IAD - CWL

$471 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 11/2. 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

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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Everything you should know

Cheapest round-trip
$752
Virgin Atlantic
Fri 12/5Fri 12/12
IAD - CWL • 1 stop
Cheapest one-way
$471
KLM
Sun 11/2
IAD - CWL • 1 stop
Top airlines
Virgin Atlantic
Cheapest • from $752 (round-trip)
KLM
Best reviews • 7.7 score
Airline reviews
Airline reviews
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+1
Airline reviews
Airline reviews
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to Cardiff

Fri, Dec 5 - Fri, Dec 12
Virgin Atlantic Logo
6:05 pm - 9:50 amIAD-CWL
10h 45m1 stop
Virgin Atlantic Logo
5:15 pm - 4:05 pmCWL-IAD
27h 50m1 stop
$752Virgin Atlantic
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Thu, Mar 5 - Thu, Mar 12
Multiple Airlines Logo
5:05 pm - 10:30 amIAD-CWL
12h 25m1 stop
Multiple Airlines Logo
10:30 am - 8:30 pmCWL-IAD
14h 00m1 stop
$754Multiple Airlines
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Fri, Nov 7 - Fri, Nov 14
KLM Logo
6:05 pm - 9:50 amIAD-CWL
10h 45m1 stop
KLM Logo
5:15 pm - 4:05 pmCWL-IAD
27h 50m1 stop
$776KLM
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Fri, Dec 5 - Fri, Dec 12
Virgin Atlantic Logo
6:05 pm - 9:50 amIAD-CWL
10h 45m1 stop
Virgin Atlantic Logo
10:20 am - 7:19 pmCWL-IAD
13h 59m2 stops
$781Virgin Atlantic
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Sun, Mar 1 - Tue, Mar 10
KLM Logo
6:05 pm - 4:45 pmIAD-CWL
17h 40m1 stop
KLM Logo
5:25 pm - 5:05 pmCWL-IAD
27h 40m1 stop
$784KLM
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Fri, Nov 7 - Fri, Nov 14
KLM Logo
6:05 pm - 9:50 amIAD-CWL
10h 45m1 stop
KLM Logo
5:15 pm - 4:23 pmCWL-IAD
28h 08m2 stops
$786KLM
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Mon, Mar 2 - Tue, Mar 10
KLM Logo
1:00 pm - 9:50 amIAD-CWL
15h 50m2 stops
KLM Logo
5:25 pm - 5:05 pmCWL-IAD
27h 40m1 stop
$789KLM
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Wed, Nov 12 - Sun, Nov 16
Delta Logo
11:05 am - 4:55 pmIAD-CWL
24h 50m2 stops
Delta Logo
10:20 am - 7:08 pmCWL-IAD
13h 48m2 stops
$791Delta
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Fri, Feb 27 - Sat, Mar 7
Delta Logo
6:05 pm - 9:50 amIAD-CWL
10h 45m1 stop
Delta Logo
10:20 am - 5:42 pmCWL-IAD
36h 22m2 stops
$794Delta
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Wed, Mar 4 - Sun, Mar 8
Aer Lingus Logo
9:00 pm - 7:45 pmIAD-CWL
17h 45m1 stop
Aer Lingus Logo
8:15 pm - 4:35 pmCWL-IAD
24h 20m1 stop
$981Aer Lingus
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Booking Insights

KAYAK's insights & trends for Dulles Intl to Cardiff flights

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 Virgin Atlantic ($752) and KLM ($776).

Which airlines fly non-stop between Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Cardiff.

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

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Good to know

Cheapest flight$471
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 $471 for a one-way ticket and $752 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 is the only airline alliance operating flights between Washington Dulles Airport and Cardiff.

  • 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.

Reviews of the top airline 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.
7.7
KLMOverall score based on 1404 reviews
7.1Entertainment
7.6Comfort
8.4Crew
7.8Boarding
7.3Food
Airline reviews

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

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

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.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

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 Dulles Intl to Cardiff

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Cardiff (CWL)

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