IAD - CWL

$359 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 1/29. 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
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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 41,299,237 times on KAYAK, and here is why:

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Cheap Flight Deals from Washington Dulles Airport 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 Washington Dulles Airport 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 Dulles Intl to Cardiff

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Dulles Intl to Cardiff.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
5:35 pm - 4:55 pmIAD-CWL
18h 20m1 stop
5:25 pm - 3:45 pmCWL-IAD
27h 20m1 stop
$798KLM
Find Deal
Tue, Jan 28 - Tue, Feb 4
12:31 pm - 9:50 amIAD-CWL
16h 19m2 stops
5:25 pm - 3:45 pmCWL-IAD
27h 20m1 stop
$802KLM
Find Deal
Tue, Jan 28 - Tue, Feb 4
5:35 pm - 9:50 amIAD-CWL
11h 15m1 stop
10:20 am - 11:13 pmCWL-IAD
17h 53m2 stops
$808Delta
Find Deal
Wed, Jan 29 - Wed, Feb 5
4:53 pm - 4:55 pmIAD-CWL
19h 02m2 stops
10:20 am - 11:13 pmCWL-IAD
17h 53m2 stops
$812Delta
Find Deal
Thu, Jan 30 - Thu, Feb 6
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
5:15 pm - 3:35 pmCWL-IAD
27h 20m1 stop
$813KLM
Find Deal
Sun, Apr 6 - Sun, Apr 13
1:45 pm - 3:55 pmIAD-CWL
21h 10m2 stops
11:00 am - 3:50 pmCWL-IAD
33h 50m1 stop
Mon, Apr 7 - Sun, Apr 13
9:55 pm - 12:25 pmIAD-CWL
33h 30m2 stops
12:00 pm - 3:35 pmCWL-IAD
32h 35m2 stops
$974British Airways
Find Deal
Tue, Jan 28 - Tue, Feb 4
7:00 pm - 12:25 pmIAD-CWL
13h 25m2 stops
12:55 pm - 3:50 pmCWL-IAD
31h 55m2 stops
$1,026British Airways
Find Deal
Wed, Mar 26 - Sun, Apr 6
9:20 pm - 4:45 pmIAD-CWL
14h 25m2 stops
9:50 am - 7:15 pmCWL-IAD
14h 25m2 stops
$1,055Air France
Find Deal
Sun, Apr 6 - Sun, Apr 13
1:45 pm - 3:55 pmIAD-CWL
21h 10m2 stops
12:25 pm - 6:55 pmCWL-IAD
11h 30m1 stop
$1,168
Find Deal
Mon, Apr 7 - Fri, Apr 11

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 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 Dulles Airport to Cardiff were found on KLM ($798) and Delta ($808).

Good to know

Cheapest flight

$359
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 $359 for a one-way ticket and $798 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 $939 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 $790 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 8540 reviews
8.6Crew
7.9Entertainment
7.3Food
8.2Boarding
8.0Comfort
Airline reviews

Broken jer bridge. Poor communication about it. Lost 2 of 4 luggage pieces

2.0 MediocreTravis, Dec 2024MSP - DTW
Read more Delta reviews

Broken jer bridge. Poor communication about it. Lost 2 of 4 luggage pieces

Overall, it was okay. Seat was a little cramped. Would’ve liked more substantial snacks or opportunity to buy some.

Newer plane, relatively easy boarding, not a full flight and was told that we could not be moved up because of weight and balance issues. Otherwise, a very good experience.

Other then mechanical/ computer problem and 3.5 hours flight delay the flight was great. I guess that what happened when you fly an old airplane now a day.

I was with one of the last zones to board. It was kind of annoying to finally get called to board and my whole section was already on the plane. Clearly they boarded with previous zones. So by the time I got on board, there were no spaces for my luggage above my head. I had to put my luggage 4+ rows behind me, which meant that I had to wait even longer to get off the plane, since I had to wait for those rows to clear the aisle before I could retrieve my luggage and exit the plane. This also held up the plane cleaners, as they couldn't service my row until I cleared it, so they were all standing there waiting for me, while I'm standing there waiting for the other passengers to clear the aisle. Anyways, I wasn't in a rush this time, so I just waited, but I could see that being a problem in the future. Now, I could have checked my luggage, of course, but coincidentally, a friend of mine on the same flight got their luggage damaged (wheel completely knocked off) and was told by the Baggage Attendant in the airport that Delta doesn't "cover wheel damage" on luggage. This was disappointing to hear. I'm glad I didn't check mine through. If it were my luggage, I'd be highly frustrated to hear that. It makes me not want to check my luggage in the future.

The dear was very limited in space. I could put my water bottle in seat basket. Also, there was no inflight entertainment in the delta app?

Typically I give delta excellent reviews. Our flight was delayed 2hrs, I was one of the fortunate ones who were able to get to my connecting flight. Also, annoying that on the connecting flight boarding personnel make me put away a small bag into my carryon. It small enough to put in back pocket seat, why hold me and the line up to just push it into my carryon.

Logan airport construction meant that boarding was chaotic crowded and delayed

Everything was great. Great service, excellent communication, and early arrival

We were forced to wait nearly 50 additional minutes before leaving the terminal.

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

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Good flight with KLM, friendly staff. Food was good, had much worse on other airlines. Selection of drinks also good enough for us. Entertainment was also good. The economy seats are ok and that’s it. For a 12 hour flight I think a little more comfort in the economy seats in pitch and softness would be highly appreciated by the customers and can makte the difference.

Good food. Excellent crew service. Clean aircraft. Narrow seats and isle.

Seats were comfortable crew members support was very good but AVML ordered or selected by us needs a lot of improvement.

Transavia flight, was booked as KLM but i couldnt select seat or access boarding pass with KLM at all. Crammed seating and very no frills experience all around. First and last time.

Transavia flight. Couldn't select seat or anything prior to flight. No connection with klm systems. Seats are very crammed. Extremely no frills.

Flight left a few minutes late, but that's it. I wish the seats could be wider and recline more.

The IFE was quite old, but it worked fine and the content was good. The cabin crew were excellent and the food was as also very good

Great flight because I upgraded to Premium Comfort. Made a huge difference in the experience.

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.
1/29Wed
3 stops
56h 40mIAD-CWL
$359
1/29Wed
1 stopKLM
18h 20mIAD-CWL
$491
1/29Wed
2 stopsKLM
16h 45mIAD-CWL
$495

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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.
1/2Thu
multi-stopBritish Airways
13h 25mIAD-CWL
1/4Sat
multi-stopBritish Airways
32h 35mCWL-IAD
$3,125

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Everything you need to know for your flight from Dulles Intl to Cardiff

Information on your arrival and departure airports

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