Find flights
Deals
When to book
FAQs & Tips
Airlines

WAS - CWL

$705 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 9/3. 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
Wed 6/5
Wed 6/12

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 42,830,901 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

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.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
5:50 pm - 9:15 amIAD-CWL
10h 25m1 stop
9:45 am - 4:00 pmCWL-IAD
11h 15m1 stop
$705Delta
Find Deal
Tue, Sep 3 - Tue, Sep 10
12:33 pm - 9:15 amIAD-CWL
15h 42m2 stops
9:45 am - 4:00 pmCWL-IAD
11h 15m1 stop
$709Delta
Find Deal
Tue, Sep 3 - Tue, Sep 10
11:20 am - 4:45 pmBWI-CWL
24h 25m2 stops
5:15 pm - 10:46 pmCWL-BWI
34h 31m2 stops
$766Air France
Find Deal
Sun, Sep 1 - Mon, Sep 9
12:59 pm - 4:45 pmDCA-CWL
22h 46m2 stops
5:15 pm - 9:16 pmCWL-DCA
33h 01m2 stops
$766Air France
Find Deal
Sun, Sep 1 - Mon, Sep 9
6:35 pm - 9:45 amIAD-CWL
11h 10m1 stop
5:25 pm - 3:45 pmCWL-IAD
27h 20m1 stop
$787KLM
Find Deal
Wed, Oct 30 - Sun, Nov 3
1:15 pm - 9:40 pmIAD-CWL
28h 25m2 stops
5:25 pm - 3:45 pmCWL-IAD
27h 20m1 stop
$791KLM
Find Deal
Wed, Oct 30 - Sun, Nov 3
4:30 pm - 4:45 pmIAD-CWL
19h 15m2 stops
9:45 am - 2:40 pmCWL-IAD
33h 55m2 stops
$922ITA Airways
Find Deal
Fri, Sep 20 - Wed, Sep 25
5:55 pm - 11:30 amIAD-CWL
12h 35m2 stops
12:00 pm - 8:00 pmCWL-IAD
37h 00m2 stops
$1,046British Airways
Find Deal
Mon, Aug 26 - Wed, Dec 11
10:45 pm - 11:30 amIAD-CWL
31h 45m2 stops
12:00 pm - 3:45 pmCWL-IAD
32h 45m2 stops
$1,053British Airways
Find Deal
Tue, Aug 27 - Wed, Dec 4
4:30 pm - 4:45 pmIAD-CWL
19h 15m2 stops
9:45 am - 2:40 pmCWL-IAD
33h 55m2 stops
$1,834ITA Airways
Find Deal
Thu, Jun 20 - Thu, Jun 27

Good to know

Low season

November

High season

October

Cheapest flight

$705
Best time to beat the crowds with an average 46% drop in price.
Most popular time to fly and prices are also 32% lower on average.
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 $705 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, and oneworld are the airline alliances operating flights between Washington, D.C. 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 $744 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 $792 and an overall rating of 7.8.

  • 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.

See more FAQs

Top airlines 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.
8.0
DeltaOverall score based on 10826 reviews
7.9Comfort
8.0Entertainment
7.4Food
8.2Boarding
8.6Crew
Airline reviews

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.

2.0 MediocreAnonymous, May 2024AVL - LGA
Read more about Delta reviews

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!

From Atlanta to Cabo I would have hoped on a plane that size I would have been able to breathe and wiggle my feet a little! The leg room in that plane is non existent and I am only 5”4’. And the air vent either wasn’t working very well or just could not blow air from the ceiling to the seat area as I was suffocating through the entire flight! And please don’t say I would have been more comfortable in first class because I cannot afford those rates and have always travelled Main Cabin without issues !

The pilots were good. Disappointing when planes don't have electrical ports

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.

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

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 boarding was one of the worst I’ve ever experienced. The fault lays on Ohare Airport and not so much the airline. The waiting area by the gate was the size to accommodate a regional flight for 20-30 people and right next to a busy walkway. When you cramped nearly 300 passengers into that space is was unbearable.

All and all pretty good. It’s crowded but that is what flying is all about. But no complaints otherwise.

At the transit could be less time not like 12 hour 6 hours the mix should be 4 hour, thanks

Everything in general was great, but we left 30 minutes late

Pros: "Crew was great, on time flight, clean plane."
Cons: "Entertainments options were shockingly few. Honestly have not been on a plane recently with so few and limited options of TV series and movies. I was extremely surprised. Wish I had know and I would’ve had more options for my family."

Flights to Cardiff

Destination:

Cardiff (CWL)United Kingdom

Cabin classes:

Browse destinations: