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BOI - STL

$54 Find cheap flights from Boise to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boise to St. Louis departing on 6/25. 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
Sat 6/29
Sat 7/6

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boise to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boise to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

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Cheap flight deals from Boise to St. Louis (BOI-STL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boise to St. Louis 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
9:13 pm - 1:05 pmBOI-STL
14h 52m1 stop
4:02 pm - 12:13 pmSTL-BOI
21h 11m1 stop
$207Spirit Airlines
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Tue, Jun 25 - Fri, Jul 12
10:59 pm - 2:12 pmBOI-STL
14h 13m1 stop
6:18 pm - 10:09 pmSTL-BOI
28h 51m1 stop
$251Spirit Airlines
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Thu, Sep 12 - Thu, Sep 19
5:57 pm - 12:58 amBOI-STL
6h 01m1 stop
6:30 pm - 12:15 amSTL-BOI
6h 45m1 stop
$302Delta
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Wed, Jun 26 - Wed, Jul 10
1:44 pm - 8:43 pmBOI-STL
5h 59m1 stop
5:30 am - 10:52 amSTL-BOI
6h 22m1 stop
$334American Airlines
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Wed, Aug 14 - Fri, Dec 13
11:55 pm - 8:51 amBOI-STL
7h 56m1 stop
5:35 pm - 11:29 pmSTL-BOI
6h 54m1 stop
$342Delta
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Mon, Oct 21 - Fri, Oct 25
12:51 am - 9:29 amBOI-STL
7h 38m1 stop
5:22 am - 10:56 amSTL-BOI
6h 34m1 stop
$366American Airlines
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Thu, Jul 25 - Sun, Jul 28
5:05 am - 2:18 pmBOI-STL
8h 13m2 stops
5:30 am - 1:30 pmSTL-BOI
9h 00m2 stops
$424United Airlines
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Wed, Aug 14 - Fri, Dec 13
6:45 pm - 1:20 pmBOI-STL
17h 35m1 stop
7:32 pm - 8:33 amSTL-BOI
14h 01m2 stops
$456Alaska Airlines
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Wed, Jun 12 - Thu, Jun 13
5:00 am - 3:41 pmBOI-STL
9h 41m2 stops
1:45 pm - 10:30 pmSTL-BOI
9h 45m1 stop
$482United Airlines
Find Deal
Wed, Jun 26 - Wed, Jul 10
10:05 am - 11:58 pmBOI-STL
12h 53m2 stops
7:00 am - 10:00 pmSTL-BOI
16h 00m2 stops
$492Alaska Airlines
Find Deal
Mon, Oct 21 - Fri, Oct 25

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

Get data-powered insights and trends into flights from Boise to St. Louis 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 Boise to St. Louis?

The average price of all flights from Boise to St. Louis clicked on KAYAK for each day over the last 12 months.
When flying from Boise to St. Louis, you should consider leaving on a Tuesday and avoid Mondays if you are looking for the best rates. For your return to Boise, you’ll find the best rates on Wednesdays and the most expensive ones on Fridays.

What is the cheapest month to fly from Boise to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Boise to St. Louis, 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 Boise to St. Louis is February, where tickets cost $349 on average. On the other hand, the most expensive months are July and March, where the average cost of tickets is $589 and $584 respectively.

How far in advance should I book a flight from Boise to St. Louis?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Boise to St. Louis, 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 Boise to St. Louis, you should book around 5 days before departure. For the absolute cheapest price, our data suggests you should book 5 days before departure.

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

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, Spirit Airlines offered the best one-way deal for that route, at $54. KAYAK users also found Boise to St. Louis round-trip flights on Spirit Airlines from $207 and on Delta from $302.

Good to know

Low season

February

High season

April

Cheapest flight

$54
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Boise to St. Louis

When to book flights from Boise to St. Louis

Are your dates flexible? Find out the best times to travel from Boise to St. Louis 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 flights from Boise to St. Louis

  • What is the cheapest flight from Boise to St. Louis?

    In the last 3 days, the lowest price for a flight from Boise to St. Louis was $54 for a one-way ticket and $207 for a round-trip.

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

    No

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

    When flying out of Boise you will be using Boise Air Term. Gowen Fld. You will be landing at St. Louis, also known as Lambert-St Louis.

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

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

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

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

  • Which is the best airline for flights from Boise to St. Louis, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Boise to St. Louis are Delta and Alaska Airlines. With an average price for the route of $462 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $373 and an overall rating of 8.0.

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

    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 Boise to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Boise 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 Boise to St. Louis?

    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 St. Louis with an airline and back to Boise with another airline. Booking your flights between Boise and STL 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 Boise to St. Louis?

    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 St. Louis from Boise up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Boise to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Boise to St. Louis. 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 Boise to St. Louis? 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
Alaska AirlinesOverall score based on 9192 reviews
8.6Crew
7.9Comfort
8.2Boarding
7.3Entertainment
7.3Food
Airline reviews

I didn’t know that food needed to be ordered ahead. Please include this in the reservation information. Overall, very good experience.

8.0 ExcellentNorma, May 2024SNA - SEA
Read more about Alaska Airlines reviews

I didn’t know that food needed to be ordered ahead. Please include this in the reservation information. Overall, very good experience.

Plane hit turbulence diverted to Houston. We'll probably get in after 3am

Cabin crew very friendly and pleasant. Flight left late but we didn't know why. Alaska Airlines app was not user friendly -- app wouldn't let us upgrade our seats, but no indication if flight was full. We wound up having to call the airline to request an upgrade and we were told none was available. Waste of time. Baggage retrieval was easy.

Full flight where I had another passenger sitting in middle seat who said that he had lost 250 lbs from 500. The stewardess on exiting the flight advise me that I was going to receive a refund. I thought she was talking about another passenger. The stewardess saw that to make him comfortable I had lifted the armrest and flew for 5 hours to Seattle from Reagan DCA with a portion of his body on my seat. I survived. I flight to remember!!!!

the flight was delayed almost 3 hours and not one time was we told that it was delayed or why. I had asked one of the crew members why it was delayed, 20 minutes after the flight was supposed to take off, and was told that they had no idea what was going on and that they had not been told anything. this is FRIGHTENING!!!! No excuse!!

Given incorrect gate upon check-in, corrected by the gate attendant, D6 rather than D5, minor inconvenience. As with the previous flight, passengers were admonished to voluntarily gate-check carry-on luggage with the statement that those in the last boarding group would have no choice but to do so. If the Boeing 737 MAX8/MAX9 doesn't have room for carry-ons it's an interior design flaw on the part of Boeing. Posting an advance warning would be helpful, such as "Boeing 737 MAX planes feature limited carry-on space. Please be aware." SFO's amenities and TSA much better than MCO's. Crew was amazing! Brought my own food because Alaska's onboard selection has soy in everything. Beverage service was excellent. This was the first and last trip with Alaska after the previous flight's issues. It's no reflection on the crew of this flight. They were great.

Flights were on time. Check in was fine. Crew members were pleasant.

The boarding gate is literally just an aisle to the concourse. There is no seating and it's shared with several other airlines. It's crowded, hot, and standing-room only. It's difficult to hear gate announcements over the PA system with too many other carriers crammed into a small space. I've enjoyed flying AA in the past on the west coast, but the BNA single gate experience is horrendous! Never again from BNA to SEA with AA.

I would have liked it to have been easier to order food for the flight. My son was not happy with the snack pack I bought him and it was a very long flight for a little boy to go without food.

It was a partial full flight. But even with a spare seat it was hard to get comfortable More on me being a wide body probably

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

Our flight to Zurich was delayed by almost 3 hours, so we missed our next flight. There was no indication it would be delayed this much. We were told the gate had changed and then it apparently took over 2 hours to load the "catering" on the plane. We were not compensated in any way for the trouble.

Rated entertainment as Mediocre as there were major problems with the Infotainment system that took probably a half hour for them to fix.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

They were an hour late and they didn’t have my wheelchair for me

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

The Wi-Fi was unavailable on this flight for some reason.

On time take off…US cabins look tired and need of refresh!

Fantastic. Smooth boarding with an infant. Never experienced it with any other carriers.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

My seat was broken. WiFi didn’t work. Gate crew at HOU were rude and condescending. Treated all the passengers badly. Bad experience, United.

First flight of the day… MINIMUM FUEL! 15 minute landing delay at HOU due to fog turned into a 2+ hour delay! Rather than circle, they had to divert to another city to refuel! Sat on tarmac at Austin to refuel. We ALL missed our connections! The crew, including pilots, were clueless. Crew was really a mess. At HOU, Untied employees were exceedingly rude to all. It was pitiful.

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

There were delays on both ends. It made it less than excellent. This plane was great though

AA1537 the AC was not working properly. It was very hot and uncomfortable.

Worst experience flying American Airlines. I fly with them often, so I was super disappointed in the service I received at gate 30 in LGA on May 24, mid-day. The flight was delayed twice. I was patiently waiting in the American Airlines lounge when I received the notice on my app that the plane was boarding 45 minutes before its newly re-scheduled take off of 4 pm (from the orginal 1:45 pm then 3:00 pm). It took me 5 min to travel from the lounge to the gate and when I arrived there at 3:20 flight gate attendant told me the flight had closed and that they announced for passengers multiple times. I showed them the notification on my app and they were really rude and unempathetic. The person who rescheduled my flight at customer service wasn't any happier but was at least helpful in getting me on the next flight.

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Was lucky to have a employee at the AA checkin counter that had compassion and understood they ordeal that we went through with our original flight being diverted, needing to stay in the aircraft and then flying to the original destination; adding hours to the trip and forcing us to miss our connection and our rebooked connection. She was able to get up on standby on the highest priority on the next flight to the closest airport we need to be at and it all worked out despite being many hours late.

Delayed so that missed connecting flight. Connecting flight was also delayed on the tarmac but they closed the gate before the rescheduled time.

Attendants were rude. Scowling. Seats were miserable and we paid extra.

Took off over an hour late with multiple mechanical issues. Gate agent in Dallas was lazy and was slow as molasses. Had a line 10 people long. Spirit bad..

This was the smoothest flight I have had in awhile. I was also offered an exit row seat for a great upgrade cost and was able to sleep almost thr whole flight due to comfort and a smooth flight. We left on time and arrived on time.

No food not even water offered unless you buy it and no usb in the seat but other than that everything was good

Because our flight from marsh Harbor to Fort Lauderdale was over three hours delayed it caused us to miss our flight in Fort Lauderdale. Because we missed that flight, it cost us nearly $100 apiece for four different travelers which totaled nearly $400. We are seeking a reimbursement for the flight that we missed in Fort Lauderdale Florida.

Flight expected to leave at 6:40 pm ended leaving at 8:00 am the following day. I slept in a cold airport. Never again Spirit for me…

The flight was on time and nice as always for me with spirit but the cabin crew were not good. They left the lights on on a red eye for the entire flight.

This was the return leg of my journey with Spirit Airlines. Despite its reputation, I found no issues as it got me from point A to B safely and without delay, especially with no mechanical delays, which is fantastic in my book! The staff, from ground crew to cabin crew, were all pleasant and hassle-free. The flight was smooth from takeoff to landing. I have absolutely no complaints about this no-frills airline!

I got a one-way, last-minute nonstop flight from PDX to BWI for only $125. Yes, I got nicked $79 more for a checked suitcase and $89 more for the BIG SEAT option, but it was worth it, even with $4.50 for coffee and $10 for a snack (the latter no different than any other airline). The grand total was still less flying on any other airline.

It was the worst ever, i will be filing a lawsuit to get a refund. Our flight was delayed 4 hours so we would miss our connecting flight, we were not rebooked to our destination the same day, we were not offered any options to get home on the same day despite being clear that we absolutely cannot get stranded at night due to family, we were forced to book our own flights on a different airline to get home, and spririt is refusing a refund because our flight wasn't cancelled, only delayed. oh yeah, and they lost our luggage on the first part of the trip and you cannot get a hold of customer service when anything goes wrong, on hold for 30+ minutes. and their app breaks so you can't use that either.

This recognisable no-frills airline gets me from point-A to point-B. I was able to get to Chicago without stress. The checked baggage collection and reclaim could be improved.

The crew was the best and very accommodating I know you don't offer any complimentary items but water and coffee will not break the bank !!

Book cheap flights from Boise to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Boise to St. Louis found on KAYAK in the last 72 hours.
6/25Tue
1 stopSpirit Airlines
14h 52mBOI-STL
$54
6/4Tue
1 stopSpirit Airlines
14h 50mBOI-STL
$118
6/6Thu
1 stopSpirit Airlines
16h 03mBOI-STL
$126
6/12Wed
1 stopDelta
6h 01mBOI-STL
$159
6/25Tue
2 stopsAlaska Airlines
12h 05mBOI-STL
$201
7/6Sat
1 stopAmerican Airlines
7h 38mBOI-STL
$229
6/5Wed
1 stopDelta
4h 51mBOI-STL
$256
6/12Wed
2 stopsUnited Airlines
11h 39mBOI-STL
$288
6/4Tue
2 stopsUnited Airlines
11h 32mBOI-STL
$336
7/6Sat
2 stopsAmerican Airlines
20h 03mBOI-STL
$443

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Boise - St. Louis Flights

Departure:

Boise (BOI)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Boise

Cabin classes: