WAS - CWL

$813 Find Cheap Flights from Washington, D.C. 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 Washington, D.C. to Cardiff departing on 8/20. 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

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 Flight Deals 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.

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Washington, D.C. to Cardiff.
Discover the best prices for you by selecting your travel dates on KAYAK.
KLM Logo
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
KLM Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$813KLM
Find Deal
Wed, Aug 20 - Wed, Aug 27
Delta Logo
9:30 am - 9:15 amIAD-CWL
18h 45m2 stops
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$818Delta
Find Deal
Wed, Aug 20 - Wed, Aug 27
KLM Logo
1:00 pm - 9:15 amBWI-CWL
15h 15m2 stops
KLM Logo
9:50 am - 12:17 amCWL-BWI
19h 27m2 stops
$828KLM
Find Deal
Wed, Aug 20 - Wed, Aug 27
Delta Logo
10:05 am - 9:15 amIAD-CWL
18h 10m2 stops
Delta Logo
9:50 am - 7:37 pmCWL-IAD
14h 47m2 stops
$828Delta
Find Deal
Wed, Aug 20 - Wed, Aug 27
KLM Logo
5:25 pm - 5:05 pmIAD-CWL
18h 40m1 stop
KLM Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$916KLM
Find Deal
Fri, Aug 29 - Sun, Sep 7
Logo
5:20 pm - 12:00 pmIAD-CWL
13h 40m1 stop
Logo
7:55 am - 3:50 pmCWL-IAD
12h 55m1 stop
$1,048
Find Deal
Thu, Jun 12 - Thu, Jun 19
Aer Lingus Logo
9:20 pm - 11:30 amBWI-CWL
33h 10m2 stops
Aer Lingus Logo
12:00 pm - 7:35 pmCWL-BWI
36h 35m2 stops
$1,052Aer Lingus
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Fri, Aug 29 - Sun, Sep 7
Logo
5:45 am - 12:00 pmBWI-CWL
25h 15m3 stops
Logo
7:55 am - 5:40 pmCWL-BWI
14h 45m2 stops
$1,172
Find Deal
Thu, Jun 12 - Thu, Jun 19
Air France Logo
9:20 pm - 5:05 pmIAD-CWL
14h 45m2 stops
Air France Logo
9:50 am - 7:15 pmCWL-IAD
14h 25m2 stops
$1,179Air France
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Fri, Aug 29 - Sun, Sep 7
Virgin Atlantic Logo
10:07 am - 9:15 amIAD-CWL
18h 08m2 stops
Virgin Atlantic Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$1,263Virgin Atlantic
Find Deal
Thu, Jun 12 - Thu, Jun 19
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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 KLM ($813) and Delta ($818).

Find deals

Good to know

Low seasonNovember
High seasonMay
Cheapest flight$813
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 73% increase in price.
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 $813 for a round-trip ticket.

  • 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.

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.
7.8
KLMOverall score based on 1334 reviews
7.8Boarding
7.2Food
7.7Comfort
7.1Entertainment
8.4Crew
Airline reviews

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

8.0 ExcellentShereen, Apr 2025AMS - YUL
Read more KLM reviews

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

You should not have to pay for WiFi in business class

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

Great boarding, great short flight but no entertainment whatsoever and no wifi. Prepare to disembark by a staircase.

Great boarding, great short flight but no entertainment whatsoever. It was supposed to have wifi but that did not work.

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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