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Cheap flights from Cardiff to Washington, D.C. from £264

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 14/6. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
29 May — 5 Jun1
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 29 April 2026.

Tue 9/611:35
CWL
-
DCA
1 stop15h 53m
Multiple Airlines
Tue 16/620:40
DCA
-
CWL
1 stop32h 35m
Multiple Airlines
Deal found 25/4£644
Mon 5/1017:15
CWL
-
IAD
1 stop27h 20m
KLM
Wed 7/1018:10
IAD
-
CWL
1 stop17h 35m
KLM
Deal found 25/4£4,115
Mon 5/1017:15
CWL
-
IAD
2 stops27h 50m
Multiple Airlines
Wed 7/1018:10
IAD
-
CWL
1 stop10h 05m
Multiple Airlines
Deal found 25/4£4,886
Mon 5/1017:15
CWL
-
IAD
2 stops27h 50m
Air France
Wed 7/1018:15
IAD
-
CWL
2 stops17h 30m
Air France
Deal found 25/4£4,927
Mon 5/1009:45
CWL
-
DCA
2 stops18h 41m
Multiple Airlines
Wed 7/1017:00
DCA
-
CWL
2 stops18h 45m
Multiple Airlines
Deal found 25/4£5,560
Mon 5/1009:45
CWL
-
BWI
2 stops17h 28m
Delta
Wed 7/1012:00
BWI
-
CWL
2 stops16h 15m
Delta
Deal found 25/4£6,125

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 29 April 2026.

Round-trip from

£644

One-way from

£264
9/6-16/6
  • 9/6-16/6
  • 2 total stops
  • 48h 28m total
  • Cardiff to Washington, D.C.
Search Deals
14/6
  • 14/6
  • 3 total stops
  • 42h 01m 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 29 April 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

Tue 9/6

11:35-22:28

1 stop15h 53m

Washington, D.C. Reagan-National

Tue 16/6

20:40-10:15

1 stop32h 35m

£644

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 5/10

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Wed 7/10

18:10-16:45

1 stop17h 35m

£4,115

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 5/10

17:15-16:05

2 stops27h 50m

Washington, D.C. Dulles Intl

Wed 7/10

18:10-09:15

1 stop10h 05m

£4,886

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 5/10

17:15-16:05

2 stops27h 50m

Washington, D.C. Dulles Intl

Wed 7/10

18:15-16:45

2 stops17h 30m

£4,927

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Mon 5/10

09:45-23:26

2 stops18h 41m

Washington, D.C. Reagan-National

Wed 7/10

17:00-16:45

2 stops18h 45m

£5,560
Fastest return journey

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Mon 5/10

09:45-22:13

2 stops17h 28m

Baltimore/Washington

Wed 7/10

12:00-09:15

2 stops16h 15m

£6,125
Cheapest one-way

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 14/6

21:45-10:46

2 stops42h 01m

£301

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sun 14/6

21:45-15:28

3 stops46h 43m

£338
Fastest single journey

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 14/6

21:45-22:28

3 stops29h 43m

£404

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Sorted by cheapest first

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 29 April 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
1,510 reviews
Check prices

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.1

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
1,510 reviews
KLM
7.8
Good
1,510 reviews
Check prices

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.1

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 17h 28m. Fly via KLM, Air France, or Delta to get the fastest option. Airlines will cover a distance of 3505 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
Arlington
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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Cardiff to Reagan-National flights
Cardiff to Dulles Intl 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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