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Cheap flights from Cardiff to District of Columbia from £549

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — IAD
27 Jan — 3 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Cardiff to District of Columbia

Enter your travel dates to find the best prices.

Best flights from Cardiff to District of Columbia
Discover carefully curated flight deals from Cardiff to District of Columbia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 28 December 2025.

Mon 9/217:15CWL - IAD
1 stop27h 50mKLM
Mon 16/218:05IAD - CWL
1 stop17h 50mKLM
Deal found 26/12£549
Sun 11/110:15CWL - IAD
2 stops37h 54mDelta
Sun 18/112:29IAD - CWL
2 stops16h 21mDelta
Deal found 26/12£583
Mon 9/217:15CWL - IAD
3 stops30h 15mMultiple Airlines
Mon 16/219:40IAD - CWL
3 stops33h 10mMultiple Airlines
Deal found 26/12£791
Sun 11/117:30CWL - IAD
1 stop27h 35mKLM
Sun 18/118:05IAD - CWL
1 stop10h 45mKLM
Deal found 26/12£549
Sun 11/110:15CWL - DCA
2 stops17h 33mKLM
Sun 18/112:55DCA - CWL
2 stops15h 55mKLM
Deal found 26/12£553
Sun 11/121:20CWL - IAD
3 stops28h 34mMultiple Airlines
Sun 18/122:30IAD - CWL
2 stops19h 35mMultiple Airlines
Deal found 26/12£932
Sun 11/121:20CWL - DCA
3 stops29h 36mMultiple Airlines
Sun 18/106:59DCA - CWL
3 stops35h 06mMultiple Airlines
Deal found 26/12£981

Find flight deals from Cardiff to District of Columbia

Keep the following information in mind while searching for Cardiff to District of Columbia flight deals. Data was last updated 28 December 2025.

Round-trip from

£549
KLM
  • KLM
  • 11/1-18/1
  • 2 total stops
  • 38h 20m total
  • Cardiff to District of Columbia
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Cardiff to District of Columbia 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 December 2025.
Use the filters below to find and compare flights from Cardiff to District of Columbia that are best for you.

Fly from

Cardiff

Fly to

District of Columbia

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 9/2

17:15-16:05

1 stop27h 50m

Washington, D.C. Dulles Intl

Mon 16/2

18:05-16:55

1 stop17h 50m

£549

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 11/1

17:30-16:05

1 stop27h 35m

Washington, D.C. Dulles Intl

Sun 18/1

18:05-09:50

1 stop10h 45m

£549

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 11/1

10:15-22:48

2 stops17h 33m

Washington, D.C. Reagan-National

Sun 18/1

12:55-09:50

2 stops15h 55m

£553

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 11/1

10:15-19:09

2 stops37h 54m

Washington, D.C. Dulles Intl

Sun 18/1

12:29-09:50

2 stops16h 21m

£583

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 9/2

17:15-18:30

3 stops30h 15m

Washington, D.C. Dulles Intl

Mon 16/2

19:40-09:50

3 stops33h 10m

£791

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 11/1

21:20-20:54

3 stops28h 34m

Washington, D.C. Dulles Intl

Sun 18/1

22:30-23:05

2 stops19h 35m

£932

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Sun 11/1

21:20-21:56

3 stops29h 36m

Washington, D.C. Reagan-National

Sun 18/1

06:59-23:05

3 stops35h 06m

£981

Flights are sorted by cheapest return flights first.

Deals found on 26/12

Best time to book a flight from Cardiff to District of Columbia

Have a flexible travel schedule? Discover the best time to fly to District of Columbia 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 District of Columbia

What is the cheapest month to book a flight from Cardiff to District of Columbia?

Currently, November is the cheapest month in which you can book a flight from Cardiff to District of Columbia (average of £509). Flying from Cardiff to District of Columbia in July is currently the most expensive (average of £801). 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 District of Columbia

Get insights into the airlines that provide service to District of Columbia. 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 District of Columbia. Reviews last updated 28 December 2025.
Check out reviews from past customers who have flown with KLM from Cardiff to District of Columbia to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,435 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Food

7.2

Boarding

7.7

Comfort

7.6

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
1,435 reviews
KLM
7.7
Good
1,435 reviews
Check prices

Overall

7.7

Crew

8.4

Entertainment

7.1

Food

7.2

Boarding

7.7

Comfort

7.6

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 District of Columbia. 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 District of Columbia?

    Cardiff Wales (CWL) is the airport you will fly out of if you book a flight from Cardiff to District of Columbia. It is only a 9.1 mi journey to Cardiff Wales (CWL) from Cardiff’s city center.

  • How long is the flight from Cardiff to District of Columbia?

    For as low as £549, KLM can have you in District of Columbia from Cardiff in 27h 50m. Airlines will cover a distance of 3548 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Cardiff to District of Columbia that include hotel bookings?

    Yes. In addition to deals on Cardiff to District of Columbia flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cardiff to District of Columbia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to District of Columbia.

  • Can I find deals for business class flights from Cardiff to District of Columbia?

    Yes. Cheapflights offers flight deals from Cardiff to District of Columbia 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 District of Columbia?

    Currently, November is the cheapest month in which you can book a flight from Cardiff to District of Columbia (average of £509). Flying from Cardiff to District of Columbia in July is currently the most expensive (average of £801). 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

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