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IAD - CWL

$739 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 3/19. 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

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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
In the last 7 days travelers have searched 46,646,933 times on KAYAK, and here is why:

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Cheap Flight Deals from Washington Dulles Airport to Cardiff (IAD-CWL)

 
These are the cheapest deals for flights from Dulles Intl to Cardiff currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. 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 - 9:50 amIAD-CWL
11h 15m1 stop
10:20 am - 3:35 pmCWL-IAD
33h 15m1 stop
$739KLM
Find Deal
Wed, Mar 19 - Sat, Mar 29
6:35 pm - 4:55 pmIAD-CWL
18h 20m1 stop
9:45 am - 3:35 pmCWL-IAD
10h 50m1 stop
$781KLM
Find Deal
Wed, Mar 19 - Mon, Mar 31
6:35 pm - 9:50 amIAD-CWL
11h 15m1 stop
9:45 am - 6:26 pmCWL-IAD
13h 41m2 stops
$791
Find Deal
Wed, Mar 19 - Sun, Mar 30
7:50 pm - 9:50 amIAD-CWL
34h 00m2 stops
9:45 am - 3:35 pmCWL-IAD
10h 50m1 stop
$795Delta
Find Deal
Wed, Mar 19 - Wed, Apr 2
12:05 pm - 9:50 amIAD-CWL
16h 45m2 stops
10:20 am - 11:16 pmCWL-IAD
17h 56m2 stops
$796Delta
Find Deal
Thu, Feb 20 - Mon, Feb 24
6:35 pm - 4:55 pmIAD-CWL
18h 20m1 stop
9:45 am - 6:26 pmCWL-IAD
13h 41m2 stops
$800
Find Deal
Thu, Mar 20 - Thu, Apr 3
10:55 pm - 11:30 amIAD-CWL
32h 35m2 stops
12:00 pm - 8:30 pmCWL-IAD
37h 30m2 stops
$966Aer Lingus
Find Deal
Sat, Mar 22 - Tue, Apr 1
7:00 pm - 11:30 amIAD-CWL
12h 30m2 stops
12:00 pm - 3:35 pmCWL-IAD
55h 35m2 stops
$1,225British Airways
Find Deal
Mon, Mar 24 - Sat, Mar 29
5:10 pm - 1:35 pmIAD-CWL
15h 25m1 stop
12:00 pm - 3:35 pmCWL-IAD
32h 35m2 stops
$1,514Aer Lingus
Find Deal
Thu, Feb 20 - Mon, Feb 24
9:55 pm - 11:30 amIAD-CWL
32h 35m2 stops
12:00 pm - 3:35 pmCWL-IAD
32h 35m2 stops
$1,596British Airways
Find Deal
Sat, Jan 4 - Sat, Jan 11

Good to know

Cheapest flight

$739
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 $739 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, and oneworld are the airline alliances operating flights between Washington Dulles Airport and Cardiff, with SkyTeam being the most commonly used for this route.

  • 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.
8.0
DeltaOverall score based on 8755 reviews
8.5Crew
8.2Boarding
7.9Entertainment
7.9Comfort
7.3Food
Airline reviews

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

8.0 ExcellentAndrew, Nov 2024MCO - LGA
Read more Delta reviews

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

Crew was nice. Flight was timely. Seats could be better as well as the food considering it’s first class.

Left on time and arrived early this extending our 31 minute transfer. Bags made it also!

Good and consistent Printer in lounge did not work for me :(

Most of my discomfort was going through TSA. However, the Delta seats had inadequate leg room and I tried my very best to connect to the wi-fi and it was a cumbersome process that finally gave me the info that I needed to sign in AFTER I had completed the flight...Why make it so difficult to use? That said I really really appreciate the pilot taking a little extra time to avoid a bad storm area and both landings in Atlanta and Orlando were flawless to my delight!!!

Delayed in taking off because no flight crew. The in seat entertainment was working properly.

All fine save for the abominable catering. Really gone downhill. We found it all inedible.

I upgraded to first class only to find out that I still had no access to the sky lounge without a sky miles card or AmEx (something that should be emphasized outside of the fine print!) Also, no food or drink service provided during the flight, so I basically paid 4x more just for “free” checked baggage and a bigger seat. Not worth it.

I appreciated friendly service from check-in, to boarding, to in-flight amenities! Attendants were accommodating and helpful. Thank you! Elaine

Delta was really good about being transparent with why we were delayed it’s just that’s the plane was really old and outdated and a lot of the comfort and amenities we know Delta to have did not shine through

Book cheap flights from Washington, D.C. to Cardiff

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3548 miIAD-CWL

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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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