Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Cardiff to Washington, D.C. from £574

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to Washington, D.C. departing on 12/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Cardiff to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
17:15 - 15:35CWL-IAD
27h 20m2 stops
Multiple Airlines Logo
17:05 - 09:50IAD-CWL
35h 45m2 stops
£574Multiple Airlines
Find Deal
Fri, 12 Dec - Sun, 14 Dec
Multiple Airlines Logo
22:25 - 18:30CWL-IAD
25h 05m2 stops
Multiple Airlines Logo
22:30 - 23:05IAD-CWL
19h 35m3 stops
£737Multiple Airlines
Find Deal
Fri, 12 Dec - Sun, 14 Dec
Multiple Airlines Logo
17:25 - 18:45CWL-IAD
30h 20m3 stops
Multiple Airlines Logo
22:30 - 23:05IAD-CWL
19h 35m3 stops
£746Multiple Airlines
Find Deal
Fri, 12 Dec - Sun, 14 Dec
Virgin Atlantic Logo
17:25 - 23:02CWL-IAD
34h 37m2 stops
Virgin Atlantic Logo
18:05 - 09:50IAD-CWL
10h 45m1 stop
£782Virgin Atlantic
Find Deal
Thu, 19 Feb - Mon, 23 Feb
Multiple Airlines Logo
22:25 - 15:35CWL-IAD
22h 10m1 stop
Multiple Airlines Logo
22:55 - 23:05IAD-CWL
43h 10m2 stops
£799Multiple Airlines
Find Deal
Fri, 12 Dec - Sat, 3 Jan
Multiple Airlines Logo
22:25 - 18:30CWL-IAD
25h 05m2 stops
Multiple Airlines Logo
18:05 - 09:50IAD-CWL
10h 45m1 stop
£829Multiple Airlines
Find Deal
Fri, 12 Dec - Sun, 14 Dec
Multiple Airlines Logo
21:20 - 14:35CWL-IAD
46h 15m2 stops
Multiple Airlines Logo
17:05 - 22:00IAD-CWL
23h 55m1 stop
£831Multiple Airlines
Find Deal
Sun, 2 Nov - Thu, 6 Nov
KLM Logo
17:25 - 16:05CWL-IAD
27h 40m1 stop
KLM Logo
18:05 - 09:50IAD-CWL
10h 45m1 stop
£832KLM
Find Deal
Fri, 12 Dec - Sun, 14 Dec
Multiple Airlines Logo
22:25 - 15:35CWL-IAD
22h 10m1 stop
Multiple Airlines Logo
21:00 - 20:55IAD-CWL
18h 55m1 stop
£943Multiple Airlines
Find Deal
Fri, 12 Dec - Sat, 3 Jan
Delta Logo
10:20 - 19:18CWL-IAD
13h 58m2 stops
Delta Logo
12:09 - 09:50IAD-CWL
16h 41m2 stops
£1,198Delta
Find Deal
Sun, 2 Nov - Thu, 6 Nov

momondo Fare Finder

 
Customise your flight search to find flights from Cardiff to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 19 October 2025.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 12/12

17:15-15:35

2 stops27h 20m

Washington, D.C. Dulles Intl

Sun 14/12

17:05-09:50

2 stops35h 45m

£574

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 12/12

22:25-18:30

2 stops25h 05m

Washington, D.C. Dulles Intl

Sun 14/12

22:30-23:05

3 stops19h 35m

£737

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 12/12

17:25-18:45

3 stops30h 20m

Washington, D.C. Dulles Intl

Sun 14/12

22:30-23:05

3 stops19h 35m

£746

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 19/2

17:25-23:02

2 stops34h 37m

Washington, D.C. Dulles Intl

Mon 23/2

18:05-09:50

1 stop10h 45m

£782

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 12/12

22:25-15:35

1 stop22h 10m

Washington, D.C. Dulles Intl

Sat 3/1

22:55-23:05

2 stops43h 10m

£799

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 12/12

22:25-18:30

2 stops25h 05m

Washington, D.C. Dulles Intl

Sun 14/12

18:05-09:50

1 stop10h 45m

£829

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 2/11

21:20-14:35

2 stops46h 15m

Washington, D.C. Dulles Intl

Thu 6/11

17:05-22:00

1 stop23h 55m

£831

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 12/12

17:25-16:05

1 stop27h 40m

Washington, D.C. Dulles Intl

Sun 14/12

18:05-09:50

1 stop10h 45m

£832

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 12/12

22:25-15:35

1 stop22h 10m

Washington, D.C. Dulles Intl

Sat 3/1

21:00-20:55

1 stop18h 55m

£943

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 2/11

10:20-19:18

2 stops13h 58m

Washington, D.C. Dulles Intl

Thu 6/11

12:09-09:50

2 stops16h 41m

£1,198

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Cardiff to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Which airlines fly to Washington, D.C. Dulles Intl Airport?

Aer Lingus, KLM and Virgin Atlantic are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from Cardiff according to our data. Aer Lingus is the first choice among our users, with 65% of people opting to fly with this airline when travelling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 3 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

When to book flights from Cardiff to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Cardiff to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Cardiff to Washington, D.C. Dulles Intl Airport (CWL to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Cardiff to Washington, D.C. Dulles Intl Airport

Direct flights

None
There are no direct flights from Cardiff to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from Cardiff to Washington, D.C. Dulles Intl Airport.
Search flight deals

  • How far is Cardiff Wales to Washington, D.C. Dulles Intl by plane?

    Cardiff Wales and Washington, D.C. Dulles Intl are 3552.6 mi apart from one another. A reasonable flight in good conditions will take 13h 58m.

  • When did momondo last update prices for flights from Cardiff Wales Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Cardiff Wales Airport to Washington, D.C. Dulles Intl Airport were last updated today.

  • How old do you have to be to fly from Cardiff Wales Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Cardiff Wales Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
College Park
Alexandria
Fairfax
Linthicum Heights
Bethesda
Gettysburg
Front Royal
Cambridge
Winchester
Ellicott City
Westminster
Arlington
Ashburn
Woodbridge
Owings Mills
Sterling
Silver Spring
National Harbor

Why use momondo?

Why should I use momondo to find a flight deal from Cardiff to Washington, D.C.?

Finding the right flight to Washington, D.C. from Cardiff is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

Can I find flights from Cardiff to Washington, D.C. with flexible booking policies on momondo?

Yes. All flights to Washington, D.C. from Cardiff on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Cardiff to Washington, D.C.?

Once all potential Cardiff to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Cardiff to Washington, D.C. right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Cardiff to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 18/11
Tue 25/11
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington, D.C.