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Cheap flights from Cardiff to Washington, D.C. from £304

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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
26 Aug — 2 Sep1
1 adult

Cheap 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 21 August 2025.

Round-trip from

£398

One-way from

£304
4/9-10/9
  • 4/9-10/9
  • 2 total stops
  • 22h 00m total
  • Cardiff to Washington, D.C.
Search Deals
6/10
  • 6/10
  • 3 total stops
  • 51h 20m total
  • Cardiff to Washington, D.C.
Search Deals

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

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 21 August 2025.

Thu 4/907:55CWL - IAD
1 stop12h 55mMultiple Airlines
Wed 10/917:20IAD - CWL
1 stop9h 05mMultiple Airlines
Deal found 18/8£398
Sat 4/1009:00CWL - IAD
1 stop11h 50mMultiple Airlines
Sat 11/1017:20IAD - CWL
1 stop12h 15mMultiple Airlines
Deal found 20/8£497
Sat 4/1009:00CWL - BWI
2 stops13h 40mMultiple Airlines
Sat 11/1018:50BWI - CWL
2 stops20h 20mMultiple Airlines
Deal found 20/8£561
Tue 2/1217:25CWL - IAD
1 stop27h 40mKLM
Sat 6/1218:05IAD - CWL
1 stop10h 45mKLM
Deal found 20/8£614
Tue 2/1210:20CWL - IAD
2 stops13h 51mDelta
Sat 6/1211:00IAD - CWL
2 stops17h 50mDelta
Deal found 20/8£618
Tue 2/1210:20CWL - DCA
2 stops17h 44mKLM
Sat 6/1212:59DCA - CWL
2 stops15h 51mKLM
Deal found 20/8£618
Thu 4/909:50CWL - IAD
2 stops14h 53mDelta
Wed 10/912:13IAD - CWL
2 stops16h 02mDelta
Deal found 18/8£620
Tue 2/1210:20CWL - BWI
2 stops17h 36mDelta
Sat 6/1211:00BWI - CWL
2 stops17h 50mDelta
Deal found 20/8£632
Sat 4/1009:45CWL - IAD
1 stop10h 50mDelta
Sat 11/1012:09IAD - CWL
2 stops16h 06mDelta
Deal found 20/8£644
Sat 4/1017:35CWL - IAD
2 stops51h 54mVirgin Atlantic
Sat 11/1019:59IAD - CWL
2 stops56h 16mVirgin Atlantic
Deal found 20/8£653
Sat 4/1009:45CWL - IAD
2 stops14h 30mKLM
Sat 11/1021:20IAD - CWL
2 stops14h 25mKLM
Deal found 20/8£692
Tue 2/1212:00CWL - DCA
3 stops24h 45mMultiple Airlines
Sat 6/1213:44DCA - CWL
3 stops16h 46mMultiple Airlines
Deal found 20/8£811

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 21 August 2025.
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 - IAD

CWLIAD

Cardiff Wales

Thu 4/9

07:55-15:50

1 stop12h 55m

Washington, D.C. Dulles Intl

Wed 10/9

17:20-07:25

1 stop9h 05m

£398

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 4/10

09:00-15:50

1 stop11h 50m

Washington, D.C. Dulles Intl

Sat 11/10

17:20-10:35

1 stop12h 15m

£497

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sat 4/10

09:00-17:40

2 stops13h 40m

Baltimore/Washington

Sat 11/10

18:50-20:10

2 stops20h 20m

£561

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 2/12

17:25-16:05

1 stop27h 40m

Washington, D.C. Dulles Intl

Sat 6/12

18:05-09:50

1 stop10h 45m

£614

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 5/2

10:20-00:07

2 stops18h 47m

Washington, D.C. Dulles Intl

Thu 12/2

12:30-09:50

2 stops16h 20m

£618

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 2/12

10:20-19:11

2 stops13h 51m

Washington, D.C. Dulles Intl

Sat 6/12

11:00-09:50

2 stops17h 50m

£618

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Tue 2/12

10:20-23:04

2 stops17h 44m

Washington, D.C. Reagan-National

Sat 6/12

12:59-09:50

2 stops15h 51m

£618

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Thu 5/2

10:20-23:08

2 stops17h 48m

Washington, D.C. Reagan-National

Thu 12/2

19:30-16:45

2 stops16h 15m

£618

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 2/12

10:20-19:11

2 stops13h 51m

Washington, D.C. Dulles Intl

Sat 6/12

18:05-09:50

1 stop10h 45m

£618

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 4/9

09:50-19:43

2 stops14h 53m

Washington, D.C. Dulles Intl

Wed 10/9

12:13-09:15

2 stops16h 02m

£620

Flights are sorted by cheapest return flights first.

Deals found on 20/8

Showing 1-10 of 22 results
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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, January is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £599). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £947). 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.

What’s the top stopover airport for flights from Cardiff to Washington, D.C.?

Share of one-stop return flights from Cardiff to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Amsterdam (AMS) – chosen by Cheapflights users on 83% of one-stop itineraries from Cardiff to Washington, D.C. on Cheapflights.

What’s the cheapest stopover airport for flights from Cardiff to Washington, D.C.?

Average return fare for one-stop flights from Cardiff to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £539.

What’s the fastest stopover option from Cardiff to Washington, D.C.?

Shortest average travel time for one-stop one-way flights from Cardiff to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) have the shortest average one-way travel time for one-stop routes: 10h 40m.

Which airport typically offers the quickest stopover for flights from Cardiff to Washington, D.C.?

Average stopover duration for one-stop one-way flights from Cardiff to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Amsterdam (AMS) offer the fastest connection on this route, with an average stopover time of 1h 48m.

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 48m. Fly via KLM or Delta 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. 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, January is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £599). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £947). 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
College Park
Laurel
Tysons

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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.
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Manchester to Reagan-National flights
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Fly with Cheapflights

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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?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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