WAS - CWL

$546 Find Cheap Flights from Washington, D.C. to Cardiff

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Cardiff departing on 12/14. 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
1 adult, Economy, 0 bags

KAYAK searches 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 Washington, D.C. 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 Washington, D.C. to Cardiff, as well as popular online travel agencies
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Cheap Flights from Washington, D.C. to Cardiff (WAS-CWL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Cardiff

Wed, Dec 3 - Sun, Dec 7
Delta Logo
1:52 pm - 4:55 pmBWI-CWL
22h 03m2 stops
Delta Logo
10:20 am - 7:32 pmCWL-BWI
38h 12m2 stops
$789Delta
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
8:59 am - 9:50 amDCA-CWL
19h 51m2 stops
Delta Logo
10:20 am - 11:08 pmCWL-DCA
17h 48m2 stops
$789Delta
Find Deal
Wed, Dec 31 - Tue, Jan 6
Delta Logo
11:30 am - 9:50 amBWI-CWL
17h 20m2 stops
Delta Logo
10:20 am - 7:12 pmCWL-BWI
37h 52m2 stops
$827Delta
Find Deal
Mon, Dec 29 - Wed, Jan 7
Delta Logo
6:49 pm - 4:55 pmDCA-CWL
17h 06m2 stops
Delta Logo
10:20 am - 11:41 pmCWL-DCA
42h 21m2 stops
$827Delta
Find Deal
Wed, Nov 12 - Sun, Nov 16
KLM Logo
6:05 pm - 9:50 amIAD-CWL
10h 45m1 stop
KLM Logo
5:30 pm - 11:03 pmCWL-IAD
34h 33m2 stops
$837KLM
Find Deal
Wed, Nov 12 - Sun, Nov 16
KLM Logo
11:05 am - 4:55 pmIAD-CWL
24h 50m2 stops
KLM Logo
10:20 am - 7:08 pmCWL-IAD
37h 48m2 stops
$841KLM
Find Deal
Thu, Dec 25 - Wed, Jan 7
Delta Logo
7:00 am - 9:50 amDCA-CWL
21h 50m2 stops
Delta Logo
10:20 am - 4:29 pmCWL-DCA
35h 09m2 stops
$925Delta
Find Deal
Fri, Dec 12 - Fri, Dec 19
Multiple Airlines Logo
5:05 pm - 7:40 pmIAD-CWL
21h 35m1 stop
Multiple Airlines Logo
10:25 pm - 7:30 pmCWL-IAD
26h 05m1 stop
$1,020Multiple Airlines
Find Deal
Fri, Dec 12 - Fri, Dec 19
Multiple Airlines Logo
5:05 pm - 4:05 pmIAD-CWL
18h 00m2 stops
Multiple Airlines Logo
10:25 pm - 3:35 pmCWL-IAD
22h 10m1 stop
$1,077Multiple Airlines
Find Deal
Sun, Dec 28 - Sun, Jan 4
Virgin Atlantic Logo
5:29 pm - 4:45 pmIAD-CWL
18h 16m2 stops
Virgin Atlantic Logo
5:30 pm - 7:09 pmCWL-IAD
30h 39m2 stops
$1,407Virgin Atlantic
Find Deal

Everything you should know

Top airlines
Delta
Cheapest • from $789 (round-trip)
KLM
Best reviews • 7.7 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$789
Delta
Wed 12/3Sun 12/7
BWI - CWL • 2 stops
Cheapest one-way
$546
Delta
Sun 12/14
IAD - CWL • 1 stop
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We hope you love your trip to Cardiff!
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Cardiff flights

Get data-powered insights and trends into flights from Washington, D.C. to Cardiff to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Washington, D.C. to Cardiff?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Cardiff were found on Delta ($789) and KLM ($837).

Which airlines fly non-stop between Washington, D.C. and Cardiff?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Washington, D.C. to Cardiff.

There is just one airline that flies from Washington, D.C. to Cardiff direct and that is KLM. The best round-trip deal found from KLM for the route is $765.

Find deals

Good to know

Cheapest flight$546
Flight from Washington Dulles Airport to Cardiff

When to book flights from Washington, D.C. to Cardiff

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 Washington, D.C. to Cardiff

  • What is the cheapest flight from Washington, D.C. to Cardiff?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Cardiff was $546 for a one-way ticket and $789 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Cardiff?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington, D.C. and on arrival in Cardiff.

  • Which airports will I be using when flying from Washington, D.C. to Cardiff?

    On your way to Cardiff, you’ll fly out from one of these Washington, D.C. airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You’ll be landing at Cardiff Wales.

  • Which aircraft models fly most regularly from Washington, D.C. to Cardiff?

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

  • Which airline alliances offer flights from Washington, D.C. to Cardiff?

    SkyTeam is the only airline alliance operating flights between Washington, D.C. and Cardiff.

  • How does KAYAK find such low prices on flights from Washington, D.C. 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 Washington, D.C. to Cardiff.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Cardiff?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Cardiff from Washington, D.C. 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 Washington, D.C. 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 Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. 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 Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Washington, D.C. to Cardiff

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. 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 Washington, D.C. 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.
7.7
KLMOverall score based on 1406 reviews
7.7Comfort
7.1Entertainment
7.3Food
8.4Crew
7.8Boarding
Airline reviews

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

2.0 MediocreElizabeth, Oct 2025CDG - AMS
Read more KLM reviews

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Flight was ok but lack of communication cost me to literally beg to be put on another flight as connecting flight had departed

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

First of all we couldn’t check in online, then we learn at the airport we were on stand by for KLM’s mistake of overbooking. The seats were not comfy at all. Our luggage got lost.

Short flight so it was okay. Nice crew, all very pleasant and professional. We were near the back in row 27 so just as we got our drinks, we started our descent so had to drink very quickly!

KLM remains a quality flag carrier airline which maintains its standards whilst all their competitors are lowering theirs.

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Everything you need to know for your flight from Washington, D.C. to Cardiff

Information on your arrival and departure airports

Cardiff (CWL)

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