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Cheap flights from Cardiff to Washington, D.C. from £688

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
30 Mar — 6 Apr1
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 February 2026.

Mon 13/417:15
CWL
-
IAD
3 stops26h 55m
Multiple Airlines
Mon 20/420:30
IAD
-
CWL
3 stops21h 20m
Multiple Airlines
Deal found 27/2£688
Mon 13/417:15
CWL
-
IAD
1 stop27h 20m
KLM
Mon 20/418:10
IAD
-
CWL
1 stop10h 05m
KLM
Deal found 27/2£723
Tue 14/409:45
CWL
-
DCA
2 stops15h 48m
Delta
Tue 21/412:59
DCA
-
CWL
2 stops15h 16m
Delta
Deal found 28/2£733
Mon 13/409:45
CWL
-
IAD
2 stops19h 57m
Virgin Atlantic
Mon 20/412:45
IAD
-
CWL
2 stops15h 30m
Virgin Atlantic
Deal found 27/2£736
Mon 13/409:45
CWL
-
DCA
2 stops17h 56m
Delta
Mon 20/412:59
DCA
-
CWL
2 stops15h 16m
Delta
Deal found 27/2£736
Mon 16/310:20
CWL
-
IAD
2 stops36h 59m
Delta
Thu 26/312:47
IAD
-
CWL
2 stops23h 58m
Delta
Deal found 23/2£837
Tue 14/417:15
CWL
-
BWI
3 stops31h 10m
Multiple Airlines
Tue 21/420:30
BWI
-
CWL
3 stops31h 45m
Multiple Airlines
Deal found 28/2£861
Wed 4/317:25
CWL
-
IAD
2 stops27h 10m
Multiple Airlines
Wed 11/318:05
IAD
-
CWL
1 stop12h 00m
Multiple Airlines
Deal found 26/2£901
Tue 14/417:15
CWL
-
DCA
3 stops29h 48m
Multiple Airlines
Tue 21/418:50
DCA
-
CWL
3 stops23h 35m
Multiple Airlines
Deal found 28/2£964
Mon 13/412:00
CWL
-
DCA
3 stops24h 46m
Multiple Airlines
Mon 20/410:11
DCA
-
CWL
3 stops20h 19m
Multiple Airlines
Deal found 27/2£965
Sun 29/309:50
CWL
-
DCA
2 stops36h 10m
Virgin Atlantic
Sun 5/418:30
DCA
-
CWL
2 stops33h 45m
Virgin Atlantic
Deal found 27/2£1,040
Sun 29/309:50
CWL
-
DCA
2 stops17h 46m
Delta
Sun 5/409:40
DCA
-
CWL
2 stops18h 35m
Delta
Deal found 27/2£1,092

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 February 2026.

Round-trip from

£688
13/4-20/4
  • 13/4-20/4
  • 6 total stops
  • 48h 15m 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 February 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

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 13/4

17:15-15:10

3 stops26h 55m

Washington, D.C. Dulles Intl

Mon 20/4

20:30-22:50

3 stops21h 20m

£688

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 13/4

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Mon 20/4

18:10-09:15

1 stop10h 05m

£723

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Tue 14/4

09:45-20:33

2 stops15h 48m

Washington, D.C. Reagan-National

Tue 21/4

12:59-09:15

2 stops15h 16m

£733

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 13/4

09:45-00:42

2 stops19h 57m

Washington, D.C. Dulles Intl

Mon 20/4

12:45-09:15

2 stops15h 30m

£736

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Mon 13/4

09:45-22:41

2 stops17h 56m

Washington, D.C. Reagan-National

Mon 20/4

12:59-09:15

2 stops15h 16m

£736

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 16/3

10:20-19:19

2 stops36h 59m

Washington, D.C. Dulles Intl

Thu 26/3

12:47-16:45

2 stops23h 58m

£837

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Tue 14/4

17:15-19:25

3 stops31h 10m

Baltimore/Washington

Tue 21/4

20:30-09:15

3 stops31h 45m

£861

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Tue 14/4

17:15-18:03

3 stops29h 48m

Washington, D.C. Reagan-National

Tue 21/4

18:50-23:25

3 stops23h 35m

£964

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Mon 13/4

12:00-07:46

3 stops24h 46m

Washington, D.C. Reagan-National

Mon 20/4

10:11-11:30

3 stops20h 19m

£965

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 29/3

09:50-22:36

2 stops17h 46m

Washington, D.C. Reagan-National

Sun 5/4

09:40-09:15

2 stops18h 35m

£1,092

Flights are sorted by cheapest return flights first.

Deals found on 27/2

Showing 1-10 of 12 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.

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

Currently, March is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £451). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £863). 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 February 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
1,461 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

7.3

Boarding

7.8

Comfort

7.6

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.7
Good
1,461 reviews
KLM
7.7
Good
1,461 reviews
Check prices

Entertainment

7.1

Crew

8.4

Food

7.3

Boarding

7.8

Comfort

7.6

Overall

7.7

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 48m. Fly via KLM, Delta, or Virgin Atlantic 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.

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

    Currently, March is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £451). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £863). 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.
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Manchester 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.?

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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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