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Cheap flights from Cardiff to Washington, D.C. from £617

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/8. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
13 Jul — 20 Jul1
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 13 June 2026.

Sat 22/811:35
CWL
-
DCA
1 stop15h 56m
Multiple Airlines
Wed 2/906:59
DCA
-
CWL
1 stop22h 16m
Multiple Airlines
Deal found 9/6£617
Mon 6/711:35
CWL
-
DCA
2 stops29h 25m
Multiple Airlines
Fri 10/706:00
DCA
-
CWL
2 stops23h 15m
Multiple Airlines
Deal found 11/6£620
Sat 22/812:00
CWL
-
IAD
2 stops34h 25m
British Airways
Wed 2/922:25
IAD
-
CWL
2 stops32h 05m
British Airways
Deal found 9/6£651
Sat 22/809:50
CWL
-
DCA
2 stops15h 43m
KLM
Wed 2/919:35
DCA
-
CWL
2 stops16h 10m
KLM
Deal found 9/6£659
Sat 22/811:35
CWL
-
IAD
1 stop13h 49m
Multiple Airlines
Wed 2/916:20
IAD
-
CWL
1 stop12h 55m
Multiple Airlines
Deal found 9/6£682
Mon 6/711:35
CWL
-
IAD
3 stops32h 26m
Multiple Airlines
Fri 10/708:18
IAD
-
CWL
2 stops20h 57m
Multiple Airlines
Deal found 10/6£690
Mon 6/717:15
CWL
-
IAD
1 stop27h 20m
Air France
Fri 10/711:10
IAD
-
CWL
2 stops24h 55m
Air France
Deal found 10/6£771
Fri 7/809:45
CWL
-
BWI
2 stops17h 54m
KLM
Fri 14/814:18
BWI
-
CWL
2 stops13h 57m
KLM
Deal found 8/6£816
Sat 22/812:00
CWL
-
BWI
2 stops36h 45m
British Airways
Wed 2/919:25
BWI
-
CWL
2 stops35h 05m
British Airways
Deal found 9/6£869
Mon 6/711:35
CWL
-
BWI
2 stops34h 06m
WestJet
Fri 10/710:33
BWI
-
CWL
2 stops18h 42m
WestJet
Deal found 8/6£1,028
Fri 7/817:15
CWL
-
BWI
3 stops31h 10m
Multiple Airlines
Fri 14/820:30
BWI
-
CWL
3 stops31h 45m
Multiple Airlines
Deal found 8/6£1,412
Thu 30/712:00
CWL
-
BWI
2 stops36h 40m
British Airways
Thu 3/921:30
BWI
-
CWL
2 stops33h 00m
British Airways
Deal found 10/6£4,631

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 13 June 2026.

Round-trip from

£617
22/8-2/9
  • 22/8-2/9
  • 2 total stops
  • 38h 12m 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 13 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 - DCA

CWLDCA

Cardiff Wales

Sat 22/8

11:35-22:31

1 stop15h 56m

Washington, D.C. Reagan-National

Wed 2/9

06:59-10:15

1 stop22h 16m

£617

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Mon 6/7

22:10-10:18

3 stops41h 08m

Washington, D.C. Reagan-National

Fri 10/7

06:00-10:15

2 stops23h 15m

£631

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sat 22/8

09:50-20:33

2 stops15h 43m

Washington, D.C. Reagan-National

Wed 2/9

19:35-16:45

2 stops16h 10m

£659
Fastest return journey

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 22/8

11:35-20:24

1 stop13h 49m

Washington, D.C. Dulles Intl

Wed 2/9

16:20-10:15

1 stop12h 55m

£682

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 6/7

11:35-15:01

3 stops32h 26m

Washington, D.C. Dulles Intl

Fri 10/7

08:18-10:15

2 stops20h 57m

£690

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 6/7

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Fri 10/7

11:10-17:05

2 stops24h 55m

£771

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Fri 7/8

09:45-22:39

2 stops17h 54m

Baltimore/Washington

Fri 14/8

14:18-09:15

2 stops13h 57m

£816

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sat 22/8

12:00-19:45

2 stops36h 45m

Baltimore/Washington

Wed 2/9

19:25-11:30

2 stops35h 05m

£869

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Mon 6/7

11:35-16:41

2 stops34h 06m

Baltimore/Washington

Fri 10/7

10:33-10:15

2 stops18h 42m

£1,028

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Thu 30/7

12:00-19:40

2 stops36h 40m

Baltimore/Washington

Thu 3/9

21:30-11:30

2 stops33h 00m

£4,631

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Showing 1-10 of 11 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.

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated 13 June 2026.
Get a feel of what it's like to fly with KLM from Cardiff to Washington, D.C. by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,527 reviews
Check prices

Boarding

7.8

Overall

7.8

Crew

8.4

Entertainment

7.2

Food

7.3

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,527 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Boarding

7.8

Overall

7.8

Crew

8.4

Entertainment

7.2

Food

7.3

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 15h 43m. Fly via KLM, British Airways, or WestJet to get the fastest option. Airlines will cover a distance of 3535 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 - Baltimore/Washington. You may also consider Cardiff Wales - Washington, D.C. Reagan-National or Cardiff Wales - Washington, D.C. Dulles Intl.

  • 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
Hanover
Oxon Hill
Gaithersburg
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 Reagan-National flights
Bristol to Dulles Intl flights
Cardiff to Dulles Intl flights
Cardiff to Reagan-National flights

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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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