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SEA - CWL

$1,149 Find cheap flights from Seattle to Cardiff

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Cardiff departing on 6/12. 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 Cardiff

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Cardiff, 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 Seattle to Cardiff, 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 Seattle to Cardiff (SEA-CWL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Cardiff 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
1:30 pm - 4:45 pmSEA-CWL
19h 15m1 stop
9:45 am - 4:35 pmCWL-SEA
14h 50m1 stop
$1,149KLM
Find Deal
Wed, Jun 12 - Wed, Jun 19
1:30 pm - 4:45 pmSEA-CWL
19h 15m1 stop
9:45 am - 4:35 pmCWL-SEA
14h 50m1 stop
$1,164KLM
Find Deal
Wed, Jun 12 - Wed, Jun 19
7:50 am - 9:15 amSEA-CWL
17h 25m2 stops
9:45 am - 4:35 pmCWL-SEA
14h 50m1 stop
$1,169KLM
Find Deal
Wed, Jun 12 - Wed, Jun 19
7:50 am - 9:15 amSEA-CWL
17h 25m2 stops
9:45 am - 4:35 pmCWL-SEA
14h 50m1 stop
$1,218KLM
Find Deal
Wed, Jun 12 - Wed, Jun 19
7:10 am - 9:15 amSEA-CWL
18h 05m2 stops
9:45 am - 9:56 pmCWL-SEA
20h 11m2 stops
$1,246KLM
Find Deal
Sat, Jun 15 - Fri, Sep 13
6:45 pm - 10:20 pmSEA-CWL
19h 35m1 stop
7:45 pm - 5:22 pmCWL-SEA
29h 37m2 stops
$1,395
Find Deal
Fri, Jul 12 - Fri, Jul 19
6:45 pm - 10:20 pmSEA-CWL
19h 35m1 stop
9:55 pm - 5:01 pmCWL-SEA
27h 06m1 stop
$1,656
Find Deal
Fri, Jul 12 - Fri, Jul 19
7:40 pm - 11:30 amSEA-CWL
31h 50m2 stops
12:00 pm - 5:45 pmCWL-SEA
37h 45m2 stops
$1,872British Airways
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Sun, Jun 16 - Sun, Jun 23
7:40 pm - 11:30 amSEA-CWL
31h 50m2 stops
12:00 pm - 11:30 amCWL-SEA
55h 30m2 stops
$1,947British Airways
Find Deal
Fri, Jul 12 - Fri, Jul 19
6:05 pm - 4:45 pmSEA-CWL
14h 40m1 stop
5:15 pm - 10:25 amCWL-SEA
25h 10m1 stop
$2,006Air France
Find Deal
Sat, Jun 15 - Fri, Sep 13

Good to know

Low season

December

High season

September

Cheapest flight

$1,149
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Seattle to Cardiff

When to book flights from Seattle to Cardiff

Are your dates flexible? Find out the best times to travel from Seattle to Cardiff 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 Seattle to Cardiff

  • What is the cheapest flight from Seattle to Cardiff?

    In the last 3 days, the lowest price for a flight from Seattle to Cardiff was $1,149 for a round-trip ticket.

  • Do I need a passport to fly between Seattle and Cardiff?

    A passport is required to fly from Seattle to Cardiff.

  • Which aircraft models fly most regularly from Seattle to Cardiff?

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

  • Which airline alliances offer flights from Seattle to Cardiff?

    SkyTeam, and oneworld are the airline alliances operating flights between Seattle and Cardiff, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Seattle to Cardiff?

    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 Seattle to Cardiff.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Cardiff?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Cardiff from Seattle 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 Seattle to Cardiff?

    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 Cardiff with an airline and back to Seattle with another airline. Booking your flights between Seattle and CWL 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 Seattle to Cardiff?

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

See more FAQs

Top airlines flying from Seattle to Cardiff

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Cardiff. 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 Seattle to Cardiff? 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 10457 reviews
7.9Comfort
8.6Crew
7.4Food
8.0Entertainment
8.2Boarding
Airline reviews

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

10.0 ExcellentSash, May 2024SEA - HNL
Read more about Delta reviews

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Had a broken tray in business class. Crew just shrugged it off.

Everything was great except for the seat. The backrest would not stay in the upright position.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Mi primera conexión se retrasó por lo cual perdí mi segunda conexión la cual salió adelantada

Crew was not friendly when I went to request a seat change.

There were choices for the snacks. Good choices and tasty lunch and breakfast as well.

The flight crew was amazing. I’m very tall and they moved me to an exit row unsolicited!!! Amazing service.

Quick and efficient as always. Air France managed to loose and damage my luggage that never made it onto my KLM flight.

The food from Lagos to Amsterdam was was very poor compared to AMS-YYZ

The flight was delayed for 2 hrs. Because they didn’t have a crew to fly. And it is not a first time for klm to do that. Last time they cancelled my filght and rebooked me 3 days later. Not reliable airline

We left one hour late because of technical difficulties. The economy comfort seats are great for the price. The crew was mediocre, they do not provide a pleasant experience, they just deliver food and drinks and give orders, not very amicable, no service and hospitality focus.

Booked connecting flights with KlM. My serving flight was the furthest part of the airport. On arrival in Zurich. My two cases arrived but only one carry on belong to my son. His three suitcase didn't arrive. After enquiring we discovered they were still in Amsterdam. We landed at 11.12. We eventually left the airport just after one.

I thought KLM was the best airline but the Lima - Amsterdam was 1 hours late, the Brussels - Amsterdam was 2.30 hours late and the Amsterdam - Lima was 30 minutes late

The food was ok. The crew seemed like they were cranky. I had one guy get mad at me for passing in between the storage area to get to the other toilet. I can understand if it's not allowed but reprimanding me like I'm a student saying "This is the last time!" was not appropriate. During my meal time, there was a French family around me. No problems there but when we usually have meals, they are supposed to put their chair in the upright position. These people did not do it and the steward did not tell them to raise their seat in the upright position. However, I was told to do so! So, me and another person next to me had to eat with the monitor almost touching our faces. Furthermore, a lady in front of me was putting her feet up and preventing another elder passenger from putting her seat back. To make it worse, she was continuously hitting her back into her seat, shaking my monitor while I was watching a movie. A crew member did speak to her about it but then she accused me of pushing her seat forward! The crew member gave me a death stare and told me to stop pushing the seat forward. I did not even touch her seat at all, if I did, she would know it. Her boyfriend also stood up and tried to push her seat even further past the maximum decline to no avail. None of these people were reprimanded but the steward, some bald guy, was extremely friendly with them and did not even try to instruct them to do anything until it was time to land. I resisted the urge to really argue with them because I would have obviously been seen as the aggressor (I have no idea why). I hardly said anything on this flight except "more wine please" and "sorry" if I bumped into someone accidentally. Overall, it was an annoying flight and I had to resist the urge to yell at the steward and the people he was overly friendly with. The happiest moment of this flight was leaving it.

Overall a good experience. We were disappointed when we had to check our carry on due to the plane being full. KLM hadn’t notified us and we had valuable items in the carry on but they still made us check it. Some of the food was great and some was mediocre. Crew is really kind and funny.

The plane was clean and the staff was friendly. Food and drinks as expected on international flights. The entertainment system was old style, with a pullout controller, and selections not as extensive as on other flights.

The food quality is poor. The staff are very friendly and accommodating. The entertainment program was limited. I experienced a delay of 30 minutes due to two issues. Passenger luggage had to be removed and there was a technical issue with the stairs not detaching from the aircraft. The pilot managed to compensate and we arrived only 15 minutes later. The luggage at Dubai airport was very slow. I waited over an hour.

Seattle - Cardiff Flights

Departure:

Seattle (SEA)United States

Destination:

Cardiff (CWL)United Kingdom

Cabin classes:

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