Latest deals
When to book
FAQs
Price Alerts

Cheap flights from Cardiff to Washington, D.C. from £544

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 13/9. 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. (CWL-IAD)

Cheap return flights

Logo
09:00 - 15:50CWL-IAD
11h 50m1 stop
Logo
20:25 - 10:35IAD-CWL
9h 10m1 stop
£544
Find Deal
Sat, 13 Sep - Sat, 20 Sep
KLM Logo
09:50 - 15:35CWL-IAD
10h 45m1 stop
KLM Logo
17:25 - 16:45IAD-CWL
18h 20m1 stop
£583KLM
Find Deal
Wed, 1 Oct - Wed, 8 Oct
Virgin Atlantic Logo
09:50 - 23:17CWL-IAD
18h 27m2 stops
Virgin Atlantic Logo
07:05 - 09:15IAD-CWL
21h 10m2 stops
£586Virgin Atlantic
Find Deal
Wed, 1 Oct - Wed, 8 Oct
Air France Logo
09:50 - 19:15CWL-IAD
14h 25m2 stops
Air France Logo
17:25 - 16:45IAD-CWL
18h 20m1 stop
£612Air France
Find Deal
Mon, 8 Sep - Mon, 15 Sep
Logo
17:15 - 15:35CWL-IAD
27h 20m1 stop
Logo
17:25 - 16:45IAD-CWL
18h 20m1 stop
£628
Find Deal
Mon, 8 Sep - Mon, 15 Sep
Logo
09:00 - 15:50CWL-IAD
11h 50m1 stop
Logo
22:35 - 12:45IAD-CWL
33h 10m2 stops
£629
Find Deal
Sat, 13 Sep - Sat, 20 Sep
Logo
20:20 - 15:20CWL-IAD
24h 00m2 stops
Logo
23:30 - 23:20IAD-CWL
19h 50m2 stops
£677
Find Deal
Thu, 23 Oct - Fri, 31 Oct
KLM Logo
09:45 - 19:37CWL-IAD
14h 52m2 stops
KLM Logo
21:20 - 16:45IAD-CWL
14h 25m2 stops
£755KLM
Find Deal
Sat, 13 Sep - Sat, 20 Sep
British Airways Logo
12:00 - 17:35CWL-IAD
34h 35m2 stops
British Airways Logo
17:50 - 11:30IAD-CWL
12h 40m2 stops
£756British Airways
Find Deal
Mon, 8 Sep - Mon, 15 Sep
Virgin Atlantic Logo
17:15 - 15:35CWL-IAD
27h 20m1 stop
Virgin Atlantic Logo
19:05 - 09:50IAD-CWL
10h 45m1 stop
£762Virgin Atlantic
Find Deal
Thu, 23 Oct - Fri, 31 Oct

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

Our best KLM deals on Cardiff to Washington, D.C. Dulles Intl Airport flight tickets
KLM
1 Oct
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
8 Oct
IAD17:25Washington, D.C. Dulles Intl
18h 20m
1 stop
CWL16:45Cardiff Wales
£583
Find similar
KLM
13 Sept
CWL09:45Cardiff Wales
14h 52m
2 stops
IAD19:37Washington, D.C. Dulles Intl
20 Sept
IAD21:20Washington, D.C. Dulles Intl
14h 25m
2 stops
CWL16:45Cardiff Wales
£755
Find similar

Virgin Atlantic flights from Cardiff to Washington, D.C. Dulles Intl Airport

Our best Virgin Atlantic deals on Cardiff to Washington, D.C. Dulles Intl Airport flight tickets
Virgin Atlantic
1 Oct
CWL09:50Cardiff Wales
18h 27m
2 stops
IAD23:17Washington, D.C. Dulles Intl
8 Oct
IAD07:05Washington, D.C. Dulles Intl
21h 10m
2 stops
CWL09:15Cardiff Wales
£586
Find similar
Virgin Atlantic
23 Oct
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
31 Oct
IAD19:05Washington, D.C. Dulles Intl
10h 45m
1 stop
CWL09:50Cardiff Wales
£762
Find similar

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 18 August 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

Sat 13/9

09:00-15:50

1 stop11h 50m

Washington, D.C. Dulles Intl

Sat 20/9

20:25-10:35

1 stop9h 10m

£544

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 1/10

09:50-15:35

1 stop10h 45m

Washington, D.C. Dulles Intl

Wed 8/10

17:25-16:45

1 stop18h 20m

£583

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 1/10

09:50-23:17

2 stops18h 27m

Washington, D.C. Dulles Intl

Wed 8/10

07:05-09:15

2 stops21h 10m

£586

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 8/9

09:50-19:15

2 stops14h 25m

Washington, D.C. Dulles Intl

Mon 15/9

17:25-16:45

1 stop18h 20m

£612

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 8/9

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Mon 15/9

17:25-16:45

1 stop18h 20m

£628

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 13/9

09:00-15:50

1 stop11h 50m

Washington, D.C. Dulles Intl

Sat 20/9

22:35-12:45

2 stops33h 10m

£629

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 23/10

20:20-15:20

2 stops24h 00m

Washington, D.C. Dulles Intl

Fri 31/10

23:30-23:20

2 stops19h 50m

£677

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 13/9

09:45-19:37

2 stops14h 52m

Washington, D.C. Dulles Intl

Sat 20/9

21:20-16:45

2 stops14h 25m

£755

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 8/9

12:00-17:35

2 stops34h 35m

Washington, D.C. Dulles Intl

Mon 15/9

17:50-11:30

2 stops12h 40m

£756

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 23/10

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Fri 31/10

19:05-09:50

1 stop10h 45m

£762

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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

Best price found

£544

Fastest flight time

10h 45m

Direct flights

None
The best flight deal from Cardiff to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is £544
The fastest flight from Cardiff to Washington, D.C. Dulles Intl Airport takes 10h 45m
There are no direct flights from Cardiff to Washington, D.C. Dulles Intl Airport. Popular non-direct route for this connection is Cardiff Wales Airport - 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 10h 45m.

  • 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.

  • How do I get Price Alerts for flights from Cardiff to Washington, D.C. Dulles Intl Airport?

    Price Alerts will notify you by email when the price for flights to Washington, D.C. Dulles Intl Airport from Cardiff decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Cardiff to Washington, D.C. Dulles Intl Airport with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Winchester
Laurel
Essex
Alexandria
Fairfax
Manassas
Bethesda
Oxon Hill
Chantilly
College Park
Linthicum Heights
Gettysburg
Front Royal
Hanover
Cambridge
Ellicott City
Westminster
Arlington
Ashburn
Woodbridge

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
Sat 23/8
Sat 30/8
By creating a price alert you accept our terms of use and privacy policy.

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