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Cheap flights from Cardiff to Washington, D.C. from £528

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 6/7. 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
1 adult, Economy, 0 bags
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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
11:35 - 15:16
CWL
-
IAD
32h 41m
1 stop
Multiple Airlines Logo
16:00 - 10:15
IAD
-
CWL
13h 15m
1 stop
£528Multiple Airlines
Mon, 6 Jul - Mon, 13 Jul
Multiple Airlines Logo
11:35 - 10:46
CWL
-
IAD
28h 11m
1 stop
Multiple Airlines Logo
16:00 - 22:50
IAD
-
CWL
25h 50m
2 stops
£547Multiple Airlines
Mon, 6 Jul - Mon, 13 Jul
Multiple Airlines Logo
22:50 - 21:26
CWL
-
IAD
27h 36m
2 stops
Multiple Airlines Logo
16:20 - 10:15
IAD
-
CWL
12h 55m
1 stop
£548Multiple Airlines
Thu, 2 Jul - Sun, 12 Jul
Multiple Airlines Logo
22:50 - 19:15
CWL
-
DCA
25h 25m
2 stops
Multiple Airlines Logo
06:00 - 10:15
DCA
-
CWL
23h 15m
2 stops
£553Multiple Airlines
Thu, 2 Jul - Sun, 12 Jul
Multiple Airlines Logo
22:50 - 21:26
CWL
-
IAD
27h 36m
2 stops
Multiple Airlines Logo
09:45 - 10:15
IAD
-
CWL
19h 30m
3 stops
£561Multiple Airlines
Thu, 2 Jul - Sun, 12 Jul
Multiple Airlines Logo
22:50 - 21:26
CWL
-
IAD
27h 36m
2 stops
Multiple Airlines Logo
08:18 - 10:15
IAD
-
CWL
20h 57m
2 stops
£580Multiple Airlines
Thu, 2 Jul - Sun, 12 Jul
Delta Logo
09:45 - 22:24
CWL
-
BWI
17h 39m
2 stops
Delta Logo
12:33 - 09:15
BWI
-
CWL
15h 42m
2 stops
£945Delta
Mon, 6 Jul - Mon, 13 Jul
WestJet Logo
11:35 - 23:18
CWL
-
BWI
16h 43m
2 stops
WestJet Logo
09:39 - 10:15
BWI
-
CWL
19h 36m
2 stops
£974WestJet
Thu, 2 Jul - Sun, 12 Jul
WestJet Logo
11:35 - 23:18
CWL
-
BWI
16h 43m
2 stops
WestJet Logo
09:39 - 10:15
BWI
-
CWL
19h 36m
2 stops
£984WestJet
Thu, 2 Jul - Sun, 12 Jul
WestJet Logo
11:35 - 16:45
CWL
-
BWI
34h 10m
2 stops
WestJet Logo
09:39 - 10:15
BWI
-
CWL
19h 36m
2 stops
£990WestJet
Thu, 2 Jul - Sun, 12 Jul

Virgin Atlantic flights from Cardiff to Washington, D.C.

Our best Virgin Atlantic deals on Cardiff to Washington, D.C. flight tickets
Virgin Atlantic
5 Jun
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
12 Jun
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
£1,299
Virgin Atlantic
6 Jun
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
13 Jun
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
£1,414
Virgin Atlantic
6 Jun
CWL09:45Cardiff Wales
16h 10m
2 stops
IAD20:55Washington, D.C. Dulles Intl
13 Jun
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
£6,029

Air France flights from Cardiff to Washington, D.C.

Our best Air France deals on Cardiff to Washington, D.C. flight tickets
Air France
6 Jun
CWL17:35Cardiff Wales
27h 00m
1 stop
IAD15:35Washington, D.C. Dulles Intl
13 Jun
IAD17:40Washington, D.C. Dulles Intl
18h 05m
1 stop
CWL16:45Cardiff Wales
£1,331
Air France
6 Jun
CWL17:35Cardiff Wales
27h 30m
2 stops
IAD16:05Washington, D.C. Dulles Intl
13 Jun
IAD17:40Washington, D.C. Dulles Intl
18h 05m
1 stop
CWL16:45Cardiff Wales
£1,354

momondo Fare Finder

 
Customise your flight search to find flights from Cardiff to Washington, D.C. 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 4 June 2026.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 6/7

11:35-15:16

1 stop32h 41m

Washington, D.C. Dulles Intl

Mon 13/7

16:00-10:15

1 stop13h 15m

£528

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 6/7

11:35-10:46

1 stop28h 11m

Washington, D.C. Dulles Intl

Mon 13/7

16:00-22:50

2 stops25h 50m

£547

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 2/7

22:50-21:26

2 stops27h 36m

Washington, D.C. Dulles Intl

Sun 12/7

16:20-10:15

1 stop12h 55m

£548

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Thu 2/7

22:50-19:15

2 stops25h 25m

Washington, D.C. Reagan-National

Sun 12/7

06:00-10:15

2 stops23h 15m

£553

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 2/7

22:50-21:26

2 stops27h 36m

Washington, D.C. Dulles Intl

Sun 12/7

09:45-10:15

3 stops19h 30m

£561

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 2/7

22:50-21:26

2 stops27h 36m

Washington, D.C. Dulles Intl

Sun 12/7

08:18-10:15

2 stops20h 57m

£580
Fastest return journey

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Mon 6/7

09:45-22:24

2 stops17h 39m

Baltimore/Washington

Mon 13/7

12:33-09:15

2 stops15h 42m

£945

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Thu 2/7

11:35-23:18

2 stops16h 43m

Baltimore/Washington

Sun 12/7

09:39-10:15

2 stops19h 36m

£974

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Thu 2/7

11:35-23:18

2 stops16h 43m

Baltimore/Washington

Sun 12/7

09:39-10:15

2 stops19h 36m

£984

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Thu 2/7

11:35-16:45

2 stops34h 10m

Baltimore/Washington

Sun 12/7

09:39-10:15

2 stops19h 36m

£990

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from Cardiff to Washington, D.C.

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

Cheap Cardiff to Washington, D.C. (CWL to WAS) flight deals and tips

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

Fastest flight time

17h 39m

Direct flights

None
The fastest flight from Cardiff to Washington, D.C. takes 17h 39m
There are no direct flights from Cardiff to Washington, D.C.. There are no popular flight routes from Cardiff to Washington, D.C..
Search flight deals

Frequently asked questions about flying from Cardiff to Washington, D.C.

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

    There are 3537.5 mi between Cardiff Wales and Washington, D.C.. 17h 39m is a normal flight duration for this route.

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

    Prices for flights from Cardiff Wales Airport to Washington, D.C. refresh daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Cardiff Wales Airport to Washington, D.C..

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

    The required travel and health documents for your Washington, D.C. 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.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Cardiff to Washington, D.C.?

Frequently asked questions about flying from Cardiff to Washington, D.C.

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

    Search flight deals from Cardiff to Washington, D.C.. While viewing offers you’ll have the option to create a Price Alert.

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

    By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
College Park
Springfield
Fairfax
Arlington
Gettysburg
Linthicum Heights
Glen Burnie
Ellicott City
Cambridge
Laurel
Lutherville Timonium
Westminster
Lexington Park
Woodbridge
Bethesda
Owings Mills
Silver Spring
Rockville
Landover

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. momondo enables you to select and highlight flights to Washington, D.C. from Cardiff with this policy.

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

momondo helps you find the best flight between Cardiff and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Cardiff to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Washington, D.C. 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.
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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport