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Cheap flights from Cardiff to Washington, D.C. from £714

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
4 Jan — 11 Jan1
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.

Best flights from Cardiff to Washington, D.C.
Discover carefully curated flight deals from Cardiff to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 December 2025.

Fri 16/110:20CWL - BWI
2 stops17h 45mDelta
Fri 23/110:54BWI - CWL
2 stops17h 56mDelta
Deal found 2/12£714
Fri 16/122:25CWL - BWI
2 stops25h 15mMultiple Airlines
Fri 23/111:30BWI - CWL
3 stops27h 10mMultiple Airlines
Deal found 2/12£827
Thu 15/110:20CWL - BWI
2 stops35h 18mDelta
Mon 19/115:38BWI - CWL
2 stops13h 12mDelta
Deal found 1/12£714
Fri 2/110:20CWL - DCA
2 stops36h 29mVirgin Atlantic
Sun 4/119:55DCA - CWL
2 stops32h 55mVirgin Atlantic
Deal found 3/12£1,674
Fri 2/117:15CWL - IAD
1 stop27h 50mKLM
Sun 4/118:05IAD - CWL
1 stop17h 40mKLM
Deal found 3/12£1,818
Fri 2/110:20CWL - IAD
2 stops18h 52mMultiple Airlines
Sun 4/118:05IAD - CWL
1 stop10h 45mMultiple Airlines
Deal found 3/12£1,302
Fri 2/117:15CWL - DCA
3 stops31h 32mMultiple Airlines
Sun 4/106:00DCA - CWL
3 stops29h 45mMultiple Airlines
Deal found 3/12£2,190

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 5 December 2025.

Round-trip from

£1,302
KLM
  • KLM
  • 2/1-4/1
  • 3 total stops
  • 29h 37m 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 5 December 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

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Fri 16/1

10:20-23:05

2 stops17h 45m

Baltimore/Washington

Fri 23/1

10:54-09:50

2 stops17h 56m

£714

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Thu 15/1

10:20-16:38

2 stops35h 18m

Baltimore/Washington

Mon 19/1

15:38-09:50

2 stops13h 12m

£714

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Fri 16/1

22:25-18:40

2 stops25h 15m

Baltimore/Washington

Fri 23/1

11:30-19:40

3 stops27h 10m

£827

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 2/1

10:20-00:12

2 stops18h 52m

Washington, D.C. Dulles Intl

Sun 4/1

18:05-09:50

1 stop10h 45m

£1,302

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Fri 2/1

10:20-17:49

2 stops36h 29m

Washington, D.C. Reagan-National

Sun 4/1

19:55-09:50

2 stops32h 55m

£1,674

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 2/1

17:15-16:05

1 stop27h 50m

Washington, D.C. Dulles Intl

Sun 4/1

18:05-16:45

1 stop17h 40m

£1,818

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Fri 2/1

17:15-19:47

3 stops31h 32m

Washington, D.C. Reagan-National

Sun 4/1

06:00-16:45

3 stops29h 45m

£2,190

Flights are sorted by cheapest return flights first.

Deals found on 2/12

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 £516). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £808). 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 5 December 2025.
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
1,430 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Food

7.2

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,430 reviews
KLM
7.7
Good
1,430 reviews
Check prices

Comfort

7.6

Overall

7.7

Boarding

7.8

Crew

8.4

Food

7.2

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 45m. Fly via Delta, Virgin Atlantic, or KLM to get the fastest option. Airlines will cover a distance of 3505 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, November is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. (average of £516). Flying from Cardiff to Washington, D.C. in July is currently the most expensive (average of £808). 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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Cardiff to Dulles Intl flights
Cardiff to Reagan-National flights

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