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Cheap flights from Cardiff to Washington, D.C. from £398

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 18/6. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
26 Jan — 2 Feb1
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 January 2025.

Round-trip from

£603

One-way from

£398
KLM
  • KLM
  • 23/3-30/3
  • 2 total stops
  • 45h 40m total
  • Cardiff to Washington, D.C.
Search Deals
18/6
  • 18/6
  • 3 total stops
  • 27h 35m 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 January 2025.

Sun 23/317:25CWL - IAD
1 stop27h 20mKLM
Sun 30/317:25IAD - CWL
1 stop18h 20mKLM
Deal found 20/1£603
Sun 23/317:25CWL - IAD
1 stop27h 20mVirgin Atlantic
Sun 30/319:59IAD - CWL
2 stops32h 16mVirgin Atlantic
Deal found 20/1£608
Sun 23/317:25CWL - BWI
2 stops43h 50mVirgin Atlantic
Sun 30/318:55BWI - CWL
2 stops33h 20mVirgin Atlantic
Deal found 20/1£613
Thu 20/210:20CWL - DCA
2 stops16h 40mDelta
Tue 25/212:55DCA - CWL
2 stops15h 55mDelta
Deal found 21/1£632
Thu 20/210:20CWL - BWI
2 stops17h 48mDelta
Tue 25/215:30BWI - CWL
2 stops13h 20mDelta
Deal found 21/1£632
Sun 23/317:25CWL - DCA
2 stops33h 51mVirgin Atlantic
Sun 30/312:10DCA - CWL
2 stops16h 05mVirgin Atlantic
Deal found 20/1£638
Sun 23/308:20CWL - BWI
3 stops43h 38mMultiple Airlines
Sun 30/318:50BWI - CWL
2 stops12h 55mMultiple Airlines
Deal found 21/1£666
Sun 23/308:20CWL - IAD
2 stops15h 05mMultiple Airlines
Sun 30/317:45IAD - CWL
3 stops22h 05mMultiple Airlines
Deal found 20/1£710
Sun 23/308:20CWL - DCA
3 stops18h 17mMultiple Airlines
Sun 30/309:40DCA - CWL
3 stops30h 10mMultiple Airlines
Deal found 21/1£1,008

Find flights from Cardiff to Washington, D.C. within your budget

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 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 23/3

17:25-16:45

1 stop27h 20m

Washington, D.C. Dulles Intl

Sun 30/3

17:25-16:45

1 stop18h 20m

£603

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 23/3

17:25-16:45

1 stop27h 20m

Washington, D.C. Dulles Intl

Sun 30/3

19:59-09:15

2 stops32h 16m

£608

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sun 23/3

17:25-09:15

2 stops43h 50m

Baltimore/Washington

Sun 30/3

18:55-09:15

2 stops33h 20m

£613

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Thu 20/2

10:20-22:00

2 stops16h 40m

Washington, D.C. Reagan-National

Tue 25/2

12:55-09:50

2 stops15h 55m

£632

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Thu 20/2

10:20-23:08

2 stops17h 48m

Baltimore/Washington

Tue 25/2

15:30-09:50

2 stops13h 20m

£632

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 23/3

17:25-23:16

2 stops33h 51m

Washington, D.C. Reagan-National

Sun 30/3

12:10-09:15

2 stops16h 05m

£638

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sun 23/3

08:20-23:58

3 stops43h 38m

Baltimore/Washington

Sun 30/3

18:50-12:45

2 stops12h 55m

£666

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 23/3

08:20-19:25

2 stops15h 05m

Washington, D.C. Dulles Intl

Sun 30/3

17:45-20:50

3 stops22h 05m

£710

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 23/3

08:20-22:37

3 stops18h 17m

Washington, D.C. Reagan-National

Sun 30/3

09:40-20:50

3 stops30h 10m

£1,008

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 18/6

20:30-19:05

3 stops27h 35m

£398

Flights are sorted by cheapest return flights first.

Deals found on 19/1

Showing 1-10 of 15 results
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.

Travel insights for flights from Cardiff to Washington, D.C.

Get recent, data-driven insights about flights from Cardiff to Washington, D.C. including ideal travel times, pricing trends, and more.

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

Currently, February is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £565). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £946). 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.

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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 21 January 2025.
Delta
8.0
Very Good
8,521 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very Good
8,521 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.5
Good
665 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Aer Lingus
7.1
Good
1,082 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines flying from Cardiff to Washington, D.C. round-trip?

    Flying on KLM is currently your cheapest option to Washington, D.C., with prices starting at £603. Additional return tickets that might be worth considering are offered by Virgin Atlantic and Delta, with the lowest prices starting at £608 and £632, respectively.

  • What are the cheapest airlines to fly from Cardiff to Washington, D.C. one-way?

    One-way options have recently been found by users for as low as £939 on Aer Lingus. Other airlines that offer cheap prices include Virgin Atlantic from £1,293 and Delta from £1,298 one-way.

  • 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, February is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £565). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £946). 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 Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Silver Spring
Arlington
Woodbridge
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.
Manchester to Dulles Intl flights
Manchester to Reagan-National flights
Bristol to Dulles Intl flights
Cardiff to Reagan-National flights
Cardiff to Dulles Intl flights
Bristol to Reagan-National flights

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