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Cheap flights from Cardiff to Washington, D.C. from £411

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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
2 Apr — 9 Apr1
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 28 March 2025.

Round-trip from

£599

One-way from

£411
12/5-19/5
  • 12/5-19/5
  • 4 total stops
  • 52h 35m total
  • Cardiff to Washington, D.C.
Search Deals
12/7
  • 12/7
  • 3 total stops
  • 37h 40m 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 28 March 2025.

Mon 12/513:10CWL - IAD
2 stops32h 05mMultiple Airlines
Mon 19/514:25IAD - CWL
2 stops20h 30mMultiple Airlines
Deal found 27/3£599
Mon 12/509:50CWL - IAD
1 stop10h 45mKLM
Mon 19/517:25IAD - CWL
1 stop10h 50mKLM
Deal found 27/3£650
Mon 12/509:50CWL - IAD
2 stops18h 04mDelta
Mon 19/517:25IAD - CWL
1 stop10h 50mDelta
Deal found 27/3£654
Mon 12/509:50CWL - DCA
2 stops15h 46mDelta
Mon 19/511:10DCA - CWL
2 stops17h 05mDelta
Deal found 27/3£654
Mon 12/509:50CWL - BWI
2 stops18h 30mDelta
Mon 19/509:55BWI - CWL
2 stops18h 20mDelta
Deal found 27/3£718
Sun 11/511:00CWL - DCA
3 stops33h 49mMultiple Airlines
Sun 18/512:55DCA - CWL
3 stops18h 50mMultiple Airlines
Deal found 27/3£736
Sun 11/512:45CWL - BWI
3 stops39h 48mMultiple Airlines
Sun 18/505:35BWI - CWL
3 stops26h 10mMultiple Airlines
Deal found 27/3£764

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 March 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

Mon 12/5

13:10-16:15

2 stops32h 05m

Washington, D.C. Dulles Intl

Mon 19/5

14:25-15:55

2 stops20h 30m

£599

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 12/5

09:50-15:35

1 stop10h 45m

Washington, D.C. Dulles Intl

Mon 19/5

17:25-09:15

1 stop10h 50m

£650

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 12/5

09:50-22:54

2 stops18h 04m

Washington, D.C. Dulles Intl

Mon 19/5

17:25-09:15

1 stop10h 50m

£654

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Mon 12/5

09:50-20:36

2 stops15h 46m

Washington, D.C. Reagan-National

Mon 19/5

11:10-09:15

2 stops17h 05m

£654

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Mon 12/5

09:50-23:20

2 stops18h 30m

Baltimore/Washington

Mon 19/5

09:55-09:15

2 stops18h 20m

£718

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 11/5

11:00-15:49

3 stops33h 49m

Washington, D.C. Reagan-National

Sun 18/5

12:55-12:45

3 stops18h 50m

£736

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sun 11/5

12:45-23:33

3 stops39h 48m

Baltimore/Washington

Sun 18/5

05:35-12:45

3 stops26h 10m

£764

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Sat 12/7

09:00-17:40

3 stops37h 40m

£411

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 13/7

17:20-18:12

2 stops29h 52m

£2,361

Flights are sorted by cheapest return flights first.

Deals found on 27/3

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, 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 28 March 2025.
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,897 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.4
Good
1,424 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Entertainment

7.9

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

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

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?

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