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Cheap flights from Cardiff to Washington, D.C. from £356

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
25 Aug — 1 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to Washington, D.C.

Enter your travel dates to find the best prices.

Cheapest flights from Cardiff to Washington, D.C.
Explore the most affordable flight options available from Cardiff to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 July 2026.

Sat 5/911:35
CWL
-
DCA
2 stops29h 39m
Multiple Airlines
Mon 21/911:00
DCA
-
CWL
2 stops30h 50m
Multiple Airlines
Deal found 24/7£599
Sat 5/911:35
CWL
-
IAD
1 stop13h 49m
Multiple Airlines
Mon 21/920:30
IAD
-
CWL
2 stops21h 20m
Multiple Airlines
Deal found 21/7£602
Tue 8/917:15
CWL
-
BWI
2 stops29h 12m
KLM
Tue 15/914:03
BWI
-
CWL
2 stops21h 42m
KLM
Deal found 25/7£637
Sat 5/917:35
CWL
-
IAD
1 stop27h 00m
KLM
Mon 21/918:10
IAD
-
CWL
1 stop10h 05m
KLM
Deal found 24/7£641
Sat 5/909:45
CWL
-
IAD
1 stop10h 50m
Air France
Mon 21/918:10
IAD
-
CWL
1 stop17h 35m
Air France
Deal found 22/7£642
Sat 5/909:45
CWL
-
BWI
2 stops16h 43m
Delta
Mon 21/913:55
BWI
-
CWL
2 stops14h 20m
Delta
Deal found 24/7£660
Sat 5/909:45
CWL
-
BWI
2 stops16h 38m
KLM
Mon 21/913:55
BWI
-
CWL
2 stops14h 20m
KLM
Deal found 22/7£662
Tue 8/912:45
CWL
-
BWI
2 stops35h 40m
Multiple Airlines
Tue 15/920:30
BWI
-
CWL
3 stops31h 45m
Multiple Airlines
Deal found 25/7£931
Sun 23/812:00
CWL
-
BWI
2 stops36h 40m
British Airways
Sun 30/821:35
BWI
-
CWL
2 stops32h 55m
British Airways
Deal found 24/7£1,050

Find flight deals from Cardiff to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 26 July 2026.

Round-trip from

£599

One-way from

£356
5/9-21/9
  • 5/9-21/9
  • 4 total stops
  • 60h 29m total
  • Cardiff to Washington, D.C.
Search Deals
28/9
  • 28/9
  • 3 total stops
  • 29h 05m total
  • Cardiff to Washington, D.C.
Search Deals

Cheapflights 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, Cheapflights users made 858,174 searches. Data last updated 26 July 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 - DCA

CWLDCA

Cardiff Wales

Sat 5/9

11:35-12:14

2 stops29h 39m

Washington, D.C. Reagan-National

Mon 21/9

11:00-22:50

2 stops30h 50m

£599

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 5/9

11:35-20:24

1 stop13h 49m

Washington, D.C. Dulles Intl

Mon 21/9

20:30-22:50

2 stops21h 20m

£602

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Tue 8/9

17:15-17:27

2 stops29h 12m

Baltimore/Washington

Tue 15/9

14:03-16:45

2 stops21h 42m

£637

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 5/9

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Mon 21/9

18:10-16:45

1 stop17h 35m

£644

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sat 5/9

09:45-21:28

2 stops16h 43m

Baltimore/Washington

Mon 21/9

13:55-09:15

2 stops14h 20m

£660

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sat 5/9

09:45-21:23

2 stops16h 38m

Baltimore/Washington

Mon 21/9

13:55-09:15

2 stops14h 20m

£662

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 23/8

21:45-15:10

2 stops46h 25m

Washington, D.C. Dulles Intl

Sun 30/8

17:15-22:00

1 stop23h 45m

£732
Fastest return journey

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 23/8

09:50-15:35

1 stop10h 45m

Washington, D.C. Dulles Intl

Sun 30/8

17:40-09:15

1 stop10h 35m

£904

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Tue 8/9

17:15-19:25

3 stops31h 10m

Baltimore/Washington

Tue 15/9

20:30-09:15

3 stops31h 45m

£944

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 3/9

11:35-18:10

2 stops35h 35m

Washington, D.C. Dulles Intl

Mon 7/9

19:00-10:15

2 stops58h 15m

£960

Flights are sorted by cheapest return flights first.

Deals found on 25/7

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Best time to book a flight from Cardiff to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Cardiff with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Cardiff to Washington, D.C.

No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Cardiff to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Cardiff to Washington, D.C.?

    Cardiff Wales (CWL), located 9.1 mi from the city center, is the airport you fly out of when you book flights from Cardiff to Washington, D.C.. 0 airlines have flights from Cardiff Wales to Washington, D.C. on a regular basis. Booking flights from Cardiff Wales to Washington, D.C. should not be difficult; the airport handles an average of 0 outbound flights to Washington, D.C. per day.

  • How long is the flight from Cardiff to Washington, D.C.?

    There are many flights that can get you from Cardiff to Washington, D.C. in 10h 50m. Fly via KLM, Air France, or Delta to get the fastest option. Airlines will cover a distance of 3548 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the most popular routes from Cardiff to Washington, D.C.?

    The most popular route from Cardiff to Washington, D.C. is Cardiff Wales - Washington, D.C. Dulles Intl. You may also consider Cardiff Wales - Baltimore/Washington or Cardiff Wales - Washington, D.C. Reagan-National.

  • Can I find deals for flights from Cardiff to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Cardiff to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cardiff to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Washington, D.C..

  • Can I find deals for business class flights from Cardiff to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Cardiff to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Alexandria

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Alternative routes for Cardiff to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.
Manchester to Dulles Intl flights
Manchester to Reagan-National flights
Bristol to Dulles Intl flights
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Bristol to Reagan-National flights
Cardiff to Reagan-National flights

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Why should you use Cheapflights to find cheap flight tickets from Cardiff to Washington, D.C.?

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Can Cheapflights find flights from Cardiff to Washington, D.C. with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Cardiff to Washington, D.C. flexibly with Cheapflights today.

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