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STL - BCN

$265 Find cheap flights from St. Louis to Barcelona

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Barcelona departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Fri 7/12
Fri 7/19

Search hundreds of travel sites at once for deals on flights to Barcelona

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Barcelona.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Barcelona.
In the last 7 days travelers have searched 44,148,666 times on KAYAK, and here is why:

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Cheap flight deals from St. Louis to Barcelona (STL-BCN)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Barcelona that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:30 am - 9:45 amSTL-BCN
20h 15m2 stops
12:15 pm - 9:53 amBCN-STL
28h 38m2 stops
$537Air Canada
Find Deal
Mon, Nov 4 - Wed, Nov 20
6:02 pm - 6:00 pmSTL-BCN
16h 58m2 stops
1:30 pm - 8:13 pmBCN-STL
13h 43m1 stop
$541British Airways
Find Deal
Mon, Nov 4 - Wed, Nov 20
5:34 am - 7:10 amSTL-BCN
18h 36m1 stop
11:00 am - 11:11 pmBCN-STL
19h 11m1 stop
$581American Airlines
Find Deal
Mon, Nov 4 - Wed, Nov 20
8:05 am - 12:45 pmSTL-BCN
21h 40m1 stop
8:30 pm - 11:27 pmBCN-STL
32h 57m2 stops
Sun, Oct 20 - Mon, Oct 28
6:37 am - 9:00 amSTL-BCN
19h 23m1 stop
1:30 pm - 11:50 amBCN-STL
28h 20m1 stop
$687American Airlines
Find Deal
Sun, Oct 20 - Mon, Oct 28
8:05 am - 10:25 amSTL-BCN
19h 20m2 stops
12:25 pm - 9:05 pmBCN-STL
15h 40m1 stop
$696United Airlines
Find Deal
Mon, Jul 1 - Thu, Jul 11
8:05 am - 10:25 amSTL-BCN
19h 20m2 stops
12:25 pm - 10:37 pmBCN-STL
17h 12m2 stops
$707United Airlines
Find Deal
Mon, Jul 1 - Thu, Jul 11
6:00 am - 6:05 amSTL-BCN
17h 05m2 stops
8:55 am - 7:08 pmBCN-STL
17h 13m2 stops
$715Delta
Find Deal
Wed, Sep 11 - Tue, Sep 17
5:26 pm - 2:20 pmSTL-BCN
13h 54m2 stops
6:10 am - 8:36 pmBCN-STL
21h 26m2 stops
$742Delta
Find Deal
Tue, Jul 2 - Wed, Jul 10
5:30 pm - 5:45 pmSTL-BCN
17h 15m2 stops
6:30 pm - 3:40 pmBCN-STL
28h 10m2 stops
$753Lufthansa
Find Deal
Wed, Jul 3 - Mon, Jul 8

Flights from St. Louis to Barcelona - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to Barcelona to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to Barcelona?

The average price of all flights from St. Louis to Barcelona-El Prat Airport clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to Barcelona on a Wednesday and more expensive on a Thursday. On your return trip to St. Louis, you should consider flying back on a Tuesday, and avoid Mondays for better deals.

What is the cheapest month to fly from St. Louis to Barcelona-El Prat Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Barcelona-El Prat Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from St. Louis to Barcelona-El Prat Airport is January, where tickets cost $698 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,555 and $1,285 respectively.

How far in advance should I book a flight from St. Louis to Barcelona-El Prat Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Barcelona-El Prat Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to Barcelona-El Prat Airport, you should book around 3 days before departure. For the absolute cheapest price, our data suggests you should book 3 days before departure.

Which airlines provide the cheapest flights from St. Louis to Barcelona?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from St. Louis to Barcelona found on KAYAK was with United Airlines for $520. Air Canada proposed a round-trip connection from $537 and British Airways from $541.

Good to know

Low season

February

High season

June

Cheapest flight

$265
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly with an average 53% increase in price.
Flight from St. Louis to Barcelona

When to book flights from St. Louis to Barcelona

Are your dates flexible? Find out the best times to travel from St. Louis to Barcelona based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking St. Louis to Barcelona flights

  • What is the carry-on policy on Lufthansa Airlines?

    If you are traveling in Economy, you are allowed one carry-on bag and one personal item. With a Business or First Class ticket, you can bring two bags onboard. The personal item should not be bigger than 11.8 × 15.7 × 3.9 inches in size, while the bags must not exceed 21.6 × 15.7 × 9 inches in dimensions.

  • Is Delta an eco-friendly airline?

    Delta is one of the most sustainable airlines in the aviation world. In attempts to minimize the impact of their services on the environment, it has invested in a modern fuel-efficient fleet, sustainable aviation fuel (SAF) development, and efficient waste management and recycling programs. Additionally, it has partnered with several environmental groups.

  • What is the easiest way to travel from Barcelona El Prat Airport (BCN) using public transport?

    Taking a bus from the airport is the easiest way to get to the city center if you don’t have a car. There are three available bus transits from the airport: Aerobus, bus number 46, and the night bus N16, N17, or N18. The buses can be found in Terminal 1 and Terminal 2.

  • Can I rent a car at Barcelona El Prat Airport (BCN)?

    At BCN, you can rent a car of your choice with ease. This is because in both of its Terminals, there are counters for Avis, Budget, Enterprise, InterRent, Hertz, Thrifty, Sixt, Firefly, and Goldcar. The pickup lot for the terminals is a short distance from the terminals. Because of the locations of the counters and pickup lot, you won’t need ground transportation to get to either.

  • What is the cheapest flight from St. Louis to Barcelona-El Prat Airport?

    In the last 3 days, the lowest price for a flight from St. Louis to Barcelona-El Prat Airport was $265 for a one-way ticket and $537 for a round-trip.

  • Do I need a passport to fly between St. Louis and Barcelona?

    A passport is required to fly from St. Louis to Barcelona.

  • Which airports will I be using when flying from St. Louis to Barcelona?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Barcelona, also known as Barcelona-El Prat.

  • Which aircraft models fly most regularly from St. Louis to Barcelona?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Barcelona?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between St. Louis and Barcelona, with SkyTeam being the most commonly used for this route.

  • What is the most popular layover when flying to Barcelona from St. Louis?

    Chicago is the most popular layover city among KAYAK users traveling from St. Louis to Barcelona.

  • Which is the best airline for flights from St. Louis to Barcelona, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from St. Louis to Barcelona are Delta and KLM. With an average price for the route of $886 and an overall rating of 8.0, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $892 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from St. Louis to Barcelona?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Barcelona.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Barcelona?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Barcelona from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Barcelona?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Barcelona with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and BCN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Barcelona?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Barcelona from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from St. Louis to Barcelona-El Prat Airport

  • The airlines that serve flights from Lambert St Louis International Airport (STL) to Barcelona El Prat Airport (BCN) have varying layover destinations. Hence, your layover destination will be determined by the airline you travel with. If you travel with American Air Lines, your stopover will be in Philadelphia, and if you choose to fly with Lufthansa, you will lay over in Frankfurt. If you decide to board a two-stop Delta Air Lines flight, your layovers will be in Detroit and Paris.
  • Lambert St Louis International Airport has two passenger terminals: Terminal 1 and Terminal 2. Terminal 1 has five Concourses: A, B, C, D, and E, while Terminal 2 has only one concourse, E. On your STL flight to BCN, you are likely to depart from Terminal 1. With Lufthansa, you will depart from T1, Concourse D; with American Airlines, you depart from T1, Concourse E; and with Delta Air Lines, you will depart from T1, Concourse A.
  • Suppose you want to travel to BCN aboard a Lufthansa airline with an infant. If that is the case, your infant can travel on your lap at a heavily discounted ticket fare. For safety, flight attendants provide the baby with a safety belt before take-off. You are encouraged to reserve a bassinet for your flight 52 hours prior for proper planning. Changing tables and spare diapers are available on board.
  • If you intend to bring a drink on your STL flight to BCN, you should be aware that most airlines only allow it if the liquid is in a 3.4-oz container. The container should be carried in a plastic, transparent, and resealable bag that does not exceed one liter in size.
  • If you are a passenger with limited mobility, you don’t have to worry about struggling in STL. This is because the airport offers wheelchair services upon request, with trained staff members always ready to assist physically challenged passengers at all times. The airport also features ramps, wheelchair accessible washrooms, and accessible parking spots close to the terminals for people with reduced mobility.
See more tips

Top 5 airlines serving from St. Louis to Barcelona

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Barcelona. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Barcelona? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10000 reviews
8.6Crew
7.4Food
8.2Boarding
7.9Comfort
8.0Entertainment
Airline reviews

It was very cold because the air conditioner was on high power, and my son got sick.

4.0 OkayAnonymous, Jun 2024ORD - SEA
Read more about Delta reviews

It was very cold because the air conditioner was on high power, and my son got sick.

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

The entertainment wasn’t playing in the app or online.

Lady was a bit rude during boarding and I was being nice to her.

Why does it have to be painful to fly long distances?

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

Original plane sidelined. Had to wait an hour for replacement.

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

No real agent onsite helping you for missing luggage there. Not like the other airline next to UA desk, they have staff attending in their desk assisting answer/helping luggage issue, even after midnight.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Food is very bad and entertint not too many options ... flight attendet service is not good

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

Seats are weirdly bent, I felt hunched the entire time.

Nothing exceptional. No drink of any type, even in first class was provided for the hour and half trip.

Paid for premium economy had no tv the whole time the crew tried to reset/reboot but would not work they said they would put a trouble ticket in for it. We had 3 seats my tv was the only one that didn't work. They cancelled our flight re worked us on another that left us at airport over night on the floor I have a ten year old and a 78 diabetic mother which also had shingles and suffers from nerve pain in legs and back. Requested wheelchair service at all airports after the re route NO wheelchair service was there to help. WORST experience we have ever had. Went to American airlines assistance it was closed. I AM FURIOUS!!! I expect some sort of compensation from this traumatic experience and no need for flying points we don't plan on using American airlines again!!!!

This is by far the worst experience I have had with American Airlines. The start of this trip was a complete disaster. I purposely planned my trip so that I would weather any delays so that I could make very important meeting at the Pentagon. My flight was cancelled because of maintenance and I was put on the first flight the next day but I was late to the meeting. After a long week at the Pentagon I just wanted to go home and my flight home which was early in the day was delayed. Eventually the flight was delayed until the next day. I was not authorized a hotel room because DCA was my point of origin. So I paid for a hotel out of pocket. The flight this morning was boarded then deplaned because the aircraft was hot. The flow of information was not happening in DCA and made it worse when the news was bad. I am going to take a break from American for my next few military flights. Hopefully whatever has been going on with American Airlines will be resolved.

We had a 2 hour delay. The seats were smaller than most other airlines. The person in front of us wanted to lay back and we had to stop her because she was pressing against my girlfriend’s legs. We had to ask her to sit up and not lay back due to the lack of room.

Information when booking said the flight would be with American Airlines but the flight was actualy with British Airways. Check in from Orlando was nice and quick. I agreed to put my cabin case in the checked luggage as it was a full flight. Case came back damaged (unable to put the handle down) so will have to dispose of it. Seats were quite cramped with very little leg room, even for economy. This was the experience of both the outgoing and return flight. Cabin crew were ok and flight time was punctual.

Everything was fine once we actually got on our flight. It was more then annoying they canceled (delayed) our flight. We lost out on a day of our trip along with money on our stay. Plus we had to book another hotel. So expensive.

This flight was canceled and delayed several times without explanation. The plane was freezing cold and no wifi for messaging. Getting off the plane was terribly unorganized and felt like it took forever….

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

There was a mistake with the first name we only discovered at security. Air canada was unable to correct it to match then passport since it was booked through an agency. The agency could not correct it either since they need at least two hours to do that. We could not fly and lost a bunch of money. Learned my lesson about kayak.

My flight got canceled. Then AC rebooked me to a next day flight. No compensation no apology. It almost messed up my entire trip and schedule. However, all the unexpepected seems routine and ordinary to AC, so customers need to get used to.

The food was horrible the flying attendance hardly made any checks and the seats were very tied ..

I love air Canada. The staff is so helpful and friendly and attentive. I paid for extra room but chose a ser near a person who took up a lot of space which gave me less space than regular economy, I was sad I did that!

I appreciated the flight was on schedule but the crew told us that the flight would be delayed because of an air craft queue to take off. Instead of us arriving at 11.55pm, we were in Toronto at something past 2am which was a massive disadvantage on my part.

For such a long flight they should offer tea or coffee in between two meals.

No seat assignment . Last on board . Though I would not receive any boarding pass

last minute was rebooked. This rebooking made me miss my connection, added a stop in my itinerary without my approval, and had me arriving 10 hours later to my destination...for a delay that was 2 hours. To boot, my final flight from London to Athens booked me in a middle seat, where I originally booked all aisle seats. This was incredibly uncomfortable for a 24 hour journey and made me incredibly upset.

Did not appreciate “hidden fees” to check a bag for international flight and purchase a seat to be next to my spouse. Won’t choose this airline again.

The flight left over 2 hours late and caused me to miss my connecting flight. Consequently, I missed my cruise ship out of Barcelona. The cost associated with this miss was as follows: Airfare to Sicily Italy to get on the ship TWO days late - $232.30 Taxi from Airport to hotel $35 Dinner at hotel $38 Hotel in Barcelona - $208 Taxi from Sicily to hotel $70 Hotel in Sicily - $148 Prorated time missed on cruise $ 1,143

Quick boarding process, slight delays on the tarmac prior to takeoff and a late arrival due to an emergency on the landing runway. Not the fault of the airline at all! Cabin crew was very friendly and the Captain kept the passengers well informed about what was going on

Economy class has no legroom so if you have the money worth to upgrade! Food was absolutely horrible! The crew was super nice!!!!!

The flight was provided by Aer Lingus and our seats were in a poor condition (15A & 15C). They looked like they needed repairing/replacing and were uncomfortable for such a long flight. Also the arm rests on Aer Lingus planes do not lift more than around 45 degrees, instead of the usual 90 degrees upright, meaning you cannot maximum the space between you & your travel companion so as to be more comfortable for such a long flight.

Flights were actually with Aer Lingus outward and American Airlines & Aer Lingus on the return journey. Outward flight with Aer Lingus was good but the return flight with them was not so good as our seats were in a poor condition (15A & 15C) and looked like they needed replacing! The American Airlines flight from Miami to JFK New York was good and the seats were very comfortable and spacious (32D & 32E)

Awful. Delay, lost vacation time and travel time now more than 24h

Awful. Flight delayed and we missed our long flight to Rome. It has been a nightmare and we have still not arrived. It was NOT a weather delay, just poor planning by AA

Boarding was as fast and efficient as possible. The flight crew were amazing and extremely friendly. We enjoyed our flight.

Very bed boarding, there was overbooked and make a lot of problems and noises

There was a problem in the luggage because there were not porters

On my way from Chicago to London, I was seated next to a quite heavy passenger. I could barely move. BA should have ensured that overweight customers are placed in comfortable seats and not to penalize also other passengers because BA is not willing to accommodate these passengers and their needs. No respect at all.

Book cheap flights from St. Louis to Barcelona

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Barcelona found on KAYAK in the last 72 hours.
10/9Wed
2 stops
33h 58mSTL-BCN
$265
10/9Wed
3 stops
30h 08mSTL-BCN
$317
10/9Wed
1 stopUnited Airlines
16h 55mSTL-BCN
$520
7/1Mon
1 stopAir Canada
15h 10mSTL-BCN
$567
6/30Sun
1 stopAir Canada
11h 20mSTL-BCN
$572
7/3Wed
2 stopsLufthansa
17h 15mSTL-BCN
$590
11/28Thu
1 stopUnited Airlines
16h 55mSTL-BCN
$619
11/22Fri
1 stopLufthansa
16h 55mSTL-BCN
$769
6/29Sat
1 stopAmerican Airlines
33h 13mSTL-BCN
$901
6/28Fri
1 stopAmerican Airlines
21h 30mSTL-BCN
$994

Search by stops

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Last minute flights from St. Louis to Barcelona

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to Barcelona that are departing in the next 10 days.
6/16Sun
multi-stopUnited Airlines
16h 25mSTL-BCN
6/22Sat
multi-stopUnited Airlines
34h 05mBCN-STL
$830
6/16Sun
multi-stop
19h 20mSTL-BCN
6/22Sat
multi-stop
27h 25mBCN-STL
$834
6/14Fri
multi-stopUnited Airlines
19h 35mSTL-BCN
6/20Thu
multi-stopUnited Airlines
15h 04mBCN-STL
$936
6/14Fri
multi-stopUnited Airlines
19h 35mSTL-BCN
6/20Thu
multi-stopUnited Airlines
26h 06mBCN-STL
$940
6/16Sun
multi-stop
16h 50mSTL-BCN
6/22Sat
multi-stop
42h 15mBCN-STL
$1,241
6/16Sun
multi-stop
15h 40mSTL-BCN
6/22Sat
multi-stop
42h 15mBCN-STL
$1,247
6/16Sun
multi-stop
38h 40mSTL-BCN
6/22Sat
multi-stop
55h 56mBCN-STL
$1,278
6/16Sun
multi-stop
58h 30mSTL-BCN
6/22Sat
multi-stop
55h 56mBCN-STL
$1,296
6/14Fri
multi-stop
12h 14mSTL-BCN
6/20Thu
multi-stop
15h 40mBCN-STL
$1,316
6/16Sun
multi-stopLufthansa
16h 55mSTL-BCN
6/22Sat
multi-stopLufthansa
26h 00mBCN-STL
$1,824

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St. Louis - Barcelona Flights

Departure:

St. Louis (STL)United States

Destination:

Barcelona (BCN)Spain

Return flight deals:

Barcelona - St. Louis

Cabin classes: