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IAD - CWL

$773 Find Cheap Flights from Washington Dulles Airport 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 Dulles Intl to Cardiff departing on 3/20. 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.
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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 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.

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
6:35 pm - 9:55 amIAD-CWL
11h 20m1 stop
5:25 pm - 4:45 pmCWL-IAD
27h 20m1 stop
$773KLM
Find Deal
Thu, Mar 20 - Thu, Mar 27
5:35 pm - 9:50 amIAD-CWL
11h 15m1 stop
5:25 pm - 4:45 pmCWL-IAD
27h 20m1 stop
$781Virgin Atlantic
Find Deal
Tue, Mar 4 - Mon, Mar 10
6:35 pm - 4:55 pmIAD-CWL
18h 20m1 stop
10:20 am - 11:00 pmCWL-IAD
16h 40m2 stops
$783KLM
Find Deal
Thu, Mar 20 - Thu, Mar 27
12:52 pm - 9:55 amIAD-CWL
16h 03m2 stops
5:25 pm - 4:45 pmCWL-IAD
27h 20m1 stop
$786KLM
Find Deal
Mon, Mar 3 - Mon, Mar 10
5:35 pm - 9:50 amIAD-CWL
11h 15m1 stop
10:20 am - 11:00 pmCWL-IAD
16h 40m2 stops
$788KLM
Find Deal
Tue, Mar 4 - Mon, Mar 10
6:15 pm - 4:55 pmIAD-CWL
17h 40m2 stops
10:20 am - 11:00 pmCWL-IAD
16h 40m2 stops
$796Delta
Find Deal
Tue, Mar 4 - Mon, Mar 10
12:15 pm - 9:55 amIAD-CWL
17h 40m2 stops
10:20 am - 11:00 pmCWL-IAD
16h 40m2 stops
$896Delta
Find Deal
Thu, Mar 20 - Thu, Mar 27
5:30 pm - 4:55 pmIAD-CWL
18h 25m3 stops
1:15 pm - 7:25 pmCWL-IAD
34h 10m2 stops
$987
Find Deal
Tue, Mar 4 - Mon, Mar 10
7:40 pm - 11:30 amIAD-CWL
34h 50m3 stops
1:15 pm - 7:25 pmCWL-IAD
34h 10m2 stops
$1,121
Find Deal
Mon, Mar 3 - Mon, Mar 10
9:30 am - 4:45 pmIAD-CWL
26h 15m2 stops
5:15 pm - 12:10 amCWL-IAD
35h 55m2 stops
$1,131Air France
Find Deal
Thu, Aug 14 - Thu, Aug 21

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 ($773) and Virgin Atlantic ($781).

Good to know

Low season

March

High season

September

Cheapest flight

$773
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 12% lower on average.
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 $773 for a round-trip ticket.

  • 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.

See more FAQs

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.
7.8
KLMOverall score based on 1333 reviews
7.3Food
7.8Boarding
7.7Comfort
8.4Crew
7.2Entertainment
Airline reviews

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

2.0 Mediocredale, Feb 2025ACC - AMS
Read more KLM reviews

They only had vegetarian food left on the flight which I wasn’t happy about. I didn’t get any food to eat at all.

Overall very poor. Flight was disorganised, staff were rude and this is my second experience with KLM that I've had baggage go missing. It feels like, if you are an economy customer, KLM staff do not show you any care. I shall never fly with KLM again. Worst airline in Europe

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

I tried to upgrade to premium economy anis seat online during the checkin process. The payment didn’t work due to a technical glitch on KLM’s website. I wasn’t able to change my seat unless I called Amsterdam. Since I was in Canada and there’s a time difference this wasn’t practical. So when I arrived early to Ottawa airport my seat wasn’t available and I could only get a middle seat in premium economy which isn’t great. These middle seats are priced at the same rate as an aisle seat which makes no sense.

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

Seats were nice and comfy. Crew was polite and attentive. Business class is awesome and worth the money.

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

It’s chaotic at the bus stop outside of the airport because of the Uber meeting point. You need to be alert and look for the KLM bus which is not branded or labeled. Incorrect information was provided to go to gate 28, when in fact the bus was at gate 27. On the plus side the bus left early and arrived early to Ottawa.

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

Information on your arrival and departure airports

Cardiff (CWL)
Washington Dulles Airport (IAD)

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