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IAD - CWL

$487 Find cheap flights from Washington Dulles Airport 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 Dulles Intl to Cardiff departing on 9/27. 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 6/8
Sat 6/15

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 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
In the last 7 days travelers have searched 43,968,530 times on KAYAK, and here is why:

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Cheap flight deals from Dulles Intl to Cardiff (IAD-CWL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl 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
6:40 pm - 9:45 amIAD-CWL
11h 05m1 stop
5:25 pm - 3:45 pmCWL-IAD
27h 20m1 stop
$800Virgin Atlantic
Find Deal
Wed, Oct 30 - Sun, Nov 3
1:15 pm - 9:45 amIAD-CWL
16h 30m2 stops
5:25 pm - 3:45 pmCWL-IAD
27h 20m1 stop
$804Virgin Atlantic
Find Deal
Wed, Oct 30 - Sun, Nov 3
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
9:45 am - 3:35 pmCWL-IAD
10h 50m1 stop
$815KLM
Find Deal
Sun, Sep 1 - Mon, Sep 9
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
9:45 am - 10:43 pmCWL-IAD
17h 58m2 stops
$825Delta
Find Deal
Sun, Sep 1 - Mon, Sep 9
6:11 pm - 4:45 pmIAD-CWL
41h 34m2 stops
9:45 am - 12:07 amCWL-IAD
19h 22m2 stops
$881Air France
Find Deal
Sun, Sep 1 - Mon, Sep 9
4:30 pm - 4:45 pmIAD-CWL
19h 15m2 stops
9:45 am - 2:40 pmCWL-IAD
57h 55m2 stops
$911ITA Airways
Find Deal
Tue, Sep 24 - Thu, Oct 3
4:30 pm - 4:45 pmIAD-CWL
19h 15m2 stops
9:45 am - 2:40 pmCWL-IAD
33h 55m2 stops
$969ITA Airways
Find Deal
Fri, Sep 20 - Fri, Sep 27
5:50 pm - 4:45 pmIAD-CWL
17h 55m1 stop
9:45 am - 4:00 pmCWL-IAD
11h 15m1 stop
$1,099KLM
Find Deal
Wed, May 22 - Wed, May 29
1:20 pm - 9:15 amIAD-CWL
14h 55m2 stops
9:45 am - 3:35 pmCWL-IAD
10h 50m1 stop
$1,103Delta
Find Deal
Wed, Jul 17 - Thu, Jul 25
9:20 pm - 4:45 pmIAD-CWL
14h 25m2 stops
9:45 am - 7:10 pmCWL-IAD
14h 25m2 stops
$1,463Air France
Find Deal
Wed, May 22 - Wed, May 29

Flights from Dulles Intl to Cardiff - Travel Insights & Trends

Get data-powered insights and trends into flights from Dulles Intl 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 Dulles Airport to Cardiff?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to Cardiff from Washington Dulles Airport were found on Delta ($487) and British Airways ($569), and the lowest round-trip tickets were found on Virgin Atlantic ($800) and KLM ($815).

Good to know

Cheapest flight

$487
Flight from Washington Dulles Airport to Cardiff

When to book flights from Dulles Intl to Cardiff

Are your dates flexible? Find out the best times to travel from Dulles Intl 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 Washington Dulles Airport to Cardiff flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Cardiff was $487 for a one-way ticket and $800 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Cardiff?

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

  • Which airports will I be using when flying from Washington Dulles Airport to Cardiff?

    Washington Dulles Airport airport is called Washington, D.C. Dulles Intl and the only airport in Cardiff is Cardiff Wales.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Cardiff?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Cardiff?

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

  • Which is the best airline for flights from Washington, D.C. to Cardiff, Delta or KLM?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Cardiff are Delta and KLM. With an average price for the route of $783 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 $910 and an overall rating of 7.8.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport 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 Dulles Airport to Cardiff.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Cardiff from Washington Dulles Airport 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 Dulles Airport 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 Dulles Airport with another airline. Booking your flights between Washington Dulles Airport 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 Washington Dulles Airport 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 Dulles Airport 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 Dulles Intl 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 Dulles Intl 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 10778 reviews
7.9Comfort
8.0Entertainment
8.6Crew
7.4Food
8.2Boarding
Airline reviews

West Jet has a horrible boarding process and the seats have no cushion.

4.0 OkayDouglas, May 2024MSP - YEG
Read more about Delta reviews

West Jet has a horrible boarding process and the seats have no cushion.

Everything went smoothly. I didn’t like that when I booked in the main cabin my wife and I weren’t seated together. One would think when booking on an option that allows picking your seat. They would put you and your travel partner together. Had to call to get it sorted. They did fix.

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

It was a good experience except when boarding a female flight attendant did not go out of her way to assist my teenage daughters in finding space for their carry-ons after their compartments were full.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

Big plane, long flight, absolutely no leg room and basically non existent air! I am 5”4’ and always travel Main Cabin, I was miserable on this plane and could barely move when we arrived in Cabo due to the cramped leg area!

The flight was again delayed for more then 2 hours with some lousy explanation regarding the reason of the delay. Although the flight was delayed for more than 2 hours, no refreshments were offered (according to EU regulations). Last 4 flights on KLM - always at least 2 hrs late. So be prepared that you cannot plan anything with KLM.

Seats are fair enough for medium tall people. Good food all the trip. Fight attendances are warm

no issues at all... Kudos to the food. This time was really really good

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.

One of the vstewardeses wanted to bump me of the plane for absolutely nothing. There is CCTV in the plane ans everything can be verified. Very disappointing , you all will see, o other 5 years and the passangers who does not smile to flight attendent will be bumped off...

The worst airline. Cancelled flight 30 min before boarding and rebooked on flight after 3 days.

It was nice to be on a legacy airline, people try at least.

Mostly fine. Minor delays departing and arriving. Quite a cramped plane, not so much as regards legroom but very narrow seats. Quiet nice food. Non-working USB charger. Flight attendants were helpful but not particularly proactive — one had to work to get their attention (but all was fine once they notice you), very Dutch style:)

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.

Book cheap flights from Washington, D.C. to Cardiff

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Washington, D.C. to Cardiff found on KAYAK in the last 72 hours.
9/27Fri
1 stopDelta
10h 50mIAD-CWL
$487
9/27Fri
2 stopsBritish Airways
31h 45mIAD-CWL
$569
9/27Fri
3 stops
34h 00mIAD-CWL
$577

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Last minute flights from Dulles Intl to Cardiff

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 Washington, D.C. to Cardiff that are departing in the next 10 days.
5/10Fri
multi-stopBritish Airways
13h 45mIAD-CWL
5/14Tue
multi-stopBritish Airways
37h 30mCWL-IAD
$1,025
5/10Fri
multi-stopAir France
18h 20mIAD-CWL
5/14Tue
multi-stopAir France
11h 15mCWL-IAD
$1,314
5/10Fri
multi-stopKLM
18h 20mIAD-CWL
5/14Tue
multi-stopKLM
18h 29mCWL-IAD
$1,324

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Washington Dulles Airport - Cardiff Flights

Departure:

Washington Dulles Airport (undefined)United States

Destination:

Cardiff (CWL)United Kingdom

Return flight deals:

Cardiff - Washington Dulles Airport

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