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Cheap flights from Cardiff to Washington, D.C. from £623

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/3. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
27 Feb — 6 Mar1
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 28 January 2026.

Fri 13/310:20
CWL
-
DCA
2 stops16h 16m
Multiple Airlines
Fri 20/317:09
DCA
-
CWL
2 stops12h 41m
Multiple Airlines
Deal found 27/1£623
Fri 13/308:35
CWL
-
IAD
2 stops16h 20m
British Airways
Fri 20/319:20
IAD
-
CWL
2 stops36h 10m
British Airways
Deal found 27/1£638
Fri 13/317:15
CWL
-
IAD
1 stop27h 50m
Multiple Airlines
Fri 20/319:29
IAD
-
CWL
2 stops34h 21m
Multiple Airlines
Deal found 27/1£665
Fri 13/308:35
CWL
-
BWI
2 stops15h 10m
British Airways
Fri 20/321:35
BWI
-
CWL
2 stops33h 55m
British Airways
Deal found 27/1£696
Fri 13/317:15
CWL
-
IAD
1 stop27h 50m
KLM
Fri 20/319:05
IAD
-
CWL
1 stop10h 45m
KLM
Deal found 27/1£703
Fri 13/308:35
CWL
-
BWI
2 stops15h 10m
Multiple Airlines
Fri 20/321:35
BWI
-
CWL
2 stops33h 55m
Multiple Airlines
Deal found 27/1£935

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 28 January 2026.

Round-trip from

£623
13/3-20/3
  • 13/3-20/3
  • 4 total stops
  • 28h 57m 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 28 January 2026.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. that are best for you.

Fly from

Cardiff

Fly to

Washington, D.C.

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Fri 13/3

10:20-22:36

2 stops16h 16m

Washington, D.C. Reagan-National

Fri 20/3

17:09-09:50

2 stops12h 41m

£623

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 13/3

08:35-20:55

2 stops16h 20m

Washington, D.C. Dulles Intl

Fri 20/3

19:20-11:30

2 stops36h 10m

£638

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 13/3

17:15-17:05

1 stop27h 50m

Washington, D.C. Dulles Intl

Fri 20/3

19:29-09:50

2 stops34h 21m

£665

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Fri 13/3

08:35-19:45

2 stops15h 10m

Baltimore/Washington

Fri 20/3

21:35-11:30

2 stops33h 55m

£696

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 13/3

17:15-17:05

1 stop27h 50m

Washington, D.C. Dulles Intl

Fri 20/3

19:05-09:50

1 stop10h 45m

£703

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Fri 13/3

08:35-19:45

2 stops15h 10m

Baltimore/Washington

Fri 20/3

21:35-11:30

2 stops33h 55m

£935

Flights are sorted by cheapest return flights first.

Deals found on 27/1

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.

What is the cheapest month to book a flight from Cardiff to Washington, D.C.?

Currently, November is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £500). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £788). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 28 January 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
7.7
Good
1,443 reviews
Check prices

Food

7.3

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.6

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Food

7.3

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.6

Overall

7.7

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 16h 20m. Fly via British Airways or KLM 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 - Baltimore/Washington. You may also consider Cardiff Wales - Washington, D.C. Dulles Intl 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.

  • What is the cheapest month to book a flight from Cardiff to Washington, D.C.?

    Currently, November is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £500). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £788). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
Woodbridge
Arlington
Alexandria
College Park

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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
Cardiff to Dulles Intl flights
Bristol to Reagan-National flights
Cardiff to Reagan-National flights

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How does Cheapflights help users find flights from Cardiff to Washington, D.C.?

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington, D.C. from Cardiff.

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.

Can Cheapflights notify me if prices for flights from Cardiff to Washington, D.C. become cheaper?

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