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Cheap flights from Cardiff to District of Columbia from £654

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — IAD
12 Sep — 19 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to District of Columbia

Enter your travel dates to find the best prices.

Cheapest flights from Cardiff to District of Columbia
Explore the most affordable flight options available from Cardiff to District of Columbia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 August 2026.

Sat 5/907:30 -
2 stops17h 54m
Mon 21/920:30 -
2 stops21h 20m
Deal found 9/8£654
Sun 6/909:50 -
1 stop10h 45m
Sun 13/917:30 -
1 stop18h 15m
Deal found 8/8£660
Sat 5/909:45 -
1 stop10h 50m
Mon 21/918:10 -
1 stop17h 35m
Deal found 10/8£666
Sat 12/917:35 -
1 stop27h 00m
Sat 19/917:30 -
1 stop10h 45m
Deal found 12/8£672
Sat 5/909:45 -
1 stop10h 50m
Mon 21/912:25 -
2 stops15h 50m
Deal found 10/8£689
Sat 5/909:45 -
2 stops18h 14m
Mon 21/911:40 -
2 stops16h 35m
Deal found 10/8£692
Sat 12/911:35 -
2 stops27h 45m
Sat 19/911:00 -
3 stops29h 20m
Deal found 12/8£696
Thu 24/922:50 -
2 stops26h 09m
Thu 1/1006:00 -
3 stops35h 20m
Deal found 10/8£715
Sun 6/909:50 -
2 stops35h 48m
Sun 13/918:26 -
2 stops33h 49m
Deal found 8/8£721
Sat 5/907:30 -
2 stops20h 01m
Mon 21/912:55 -
3 stops28h 55m
Deal found 9/8£728
Thu 24/922:50 -
2 stops26h 35m
Thu 1/1008:28 -
2 stops32h 52m
Deal found 10/8£760
Sat 12/909:45 -
2 stops18h 29m
Sat 19/918:26 -
2 stops17h 19m
Deal found 12/8£779

Find flight deals from Cardiff to District of Columbia

Keep the following information in mind while searching for Cardiff to District of Columbia flight deals. Data was last updated 13 August 2026.

Round-trip from

£654
5/9-21/9
  • 5/9-21/9
  • 4 total stops
  • 39h 14m total
  • Cardiff to District of Columbia
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to District of Columbia 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 13 August 2026.
Use the filters below to find and compare flights from Cardiff to District of Columbia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

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

£666

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Sat 12/9

17:35-15:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Sat 19/9

17:30-09:15

1 stop10h 45m

£672
Fastest return journey

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Sun 6/9

09:50-15:35

1 stop10h 45m

Washington, D.C. Dulles Intl

Sun 13/9

12:25-09:15

2 stops15h 50m

£680

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Sat 5/9

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Mon 21/9

12:25-09:15

2 stops15h 50m

£689

CardiffWashington, D.C.

CWL Cardiff Wales - DCA Washington, D.C. Reagan-National

CWLDCA

Cardiff Wales

Sat 12/9

09:45-23:02

2 stops18h 17m

Washington, D.C. Reagan-National

Sat 19/9

11:10-09:15

2 stops17h 05m

£692

CardiffWashington, D.C.

CWL Cardiff Wales - DCA Washington, D.C. Reagan-National

CWLDCA

Cardiff Wales

Sat 5/9

09:45-22:59

2 stops18h 14m

Washington, D.C. Reagan-National

Mon 21/9

11:40-09:15

2 stops16h 35m

£692

CardiffWashington, D.C.

CWL Cardiff Wales - DCA Washington, D.C. Reagan-National

CWLDCA

Cardiff Wales

Sat 12/9

11:35-10:20

2 stops27h 45m

Washington, D.C. Reagan-National

Sat 19/9

11:00-21:20

3 stops29h 20m

£696

CardiffWashington, D.C.

CWL Cardiff Wales - DCA Washington, D.C. Reagan-National

CWLDCA

Cardiff Wales

Thu 24/9

22:50-19:59

2 stops26h 09m

Washington, D.C. Reagan-National

Thu 1/10

06:00-22:20

3 stops35h 20m

£715

CardiffWashington, D.C.

CWL Cardiff Wales - DCA Washington, D.C. Reagan-National

CWLDCA

Cardiff Wales

Sat 5/9

07:30-10:18

3 stops31h 48m

Washington, D.C. Reagan-National

Mon 21/9

12:55-22:50

3 stops28h 55m

£752

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Thu 24/9

22:50-20:25

2 stops26h 35m

Washington, D.C. Dulles Intl

Thu 1/10

08:28-22:20

2 stops32h 52m

£760

Flights are sorted by cheapest return flights first.

Deals found on 9/8

Showing 1-10 of 21 resultsSorted by cheapest first
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Best time to book a flight from Cardiff to District of Columbia

Have a flexible travel schedule? Discover the best time to fly to District of Columbia 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 District of Columbia

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 District of Columbia. 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 District of Columbia?

    Cardiff Wales (CWL) is the airport you will fly out of if you book a flight from Cardiff to District of Columbia. It is only a 9.1 mi journey to Cardiff Wales (CWL) from Cardiff’s city center.

  • How long is the flight from Cardiff to District of Columbia?

    For as low as £666, KLM can have you in District of Columbia from Cardiff in 10h 50m. Airlines will cover a distance of 3548 mi.

  • Can I find deals for flights from Cardiff to District of Columbia that include hotel bookings?

    Yes. In addition to deals on Cardiff to District of Columbia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cardiff to District of Columbia?

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

  • Can I find deals for business class flights from Cardiff to District of Columbia?

    Yes. Cheapflights offers flight deals from Cardiff to District of Columbia 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

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