Find flights
Deals
Insights
When to book
FAQs & Tips
Airlines

IAD - CWL

$802 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 8/10. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

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

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

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

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Dulles Intl to Cardiff.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Delta Logo
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$802Delta
Find Deal
Sun, Aug 10 - Wed, Aug 27
Delta Logo
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$845Delta
Find Deal
Mon, Aug 11 - Sun, Aug 24
Delta Logo
8:30 pm - 4:45 pmIAD-CWL
15h 15m2 stops
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$849Delta
Find Deal
Sun, Aug 31 - Wed, Sep 17
Delta Logo
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
Delta Logo
9:50 am - 4:42 pmCWL-IAD
35h 52m2 stops
$855Delta
Find Deal
Mon, Aug 18 - Mon, Sep 1
Logo
1:00 pm - 9:15 amIAD-CWL
15h 15m2 stops
Logo
9:50 am - 11:15 pmCWL-IAD
18h 25m2 stops
$859
Find Deal
Wed, Aug 20 - Wed, Aug 27
Delta Logo
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$889Delta
Find Deal
Tue, Jul 22 - Thu, Aug 7
Delta Logo
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$905Delta
Find Deal
Thu, Aug 14 - Fri, Aug 29
KLM Logo
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
KLM Logo
5:15 pm - 3:35 pmCWL-IAD
27h 20m1 stop
$927KLM
Find Deal
Thu, Sep 18 - Tue, Sep 30
KLM Logo
5:25 pm - 9:15 amIAD-CWL
10h 50m1 stop
KLM Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$1,179KLM
Find Deal
Thu, Jun 19 - Fri, Jun 27
ITA Airways Logo
4:30 pm - 4:45 pmIAD-CWL
43h 15m2 stops
ITA Airways Logo
9:50 am - 2:40 pmCWL-IAD
57h 50m2 stops
$2,107ITA Airways
Find Deal
Sat, May 17 - Wed, May 28

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 Delta ($802) and KLM ($927).
Find deals

Good to know

Low season

March

High season

September

Cheapest flight

$802
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 $802 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 1321 reviews
8.4Crew
7.7Comfort
7.1Entertainment
7.3Food
7.8Boarding
Airline reviews

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

6.0 GoodPaul, Mar 2025BOM - MLE
Read more KLM reviews

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

You should not have to pay for WiFi in business class

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

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.

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)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.