Find flights
When to book
Airlines
FAQs

Cheap flights from Cardiff to Washington, D.C. from £618

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/7. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — WAS
8 Jul — 15 Jul1
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 8 June 2026.

Mon 6/722:10
CWL
-
DCA
2 stops29h 21m
Multiple Airlines
Mon 13/718:55
DCA
-
CWL
1 stop10h 20m
Multiple Airlines
Deal found 6/6£618
Mon 6/722:10
CWL
-
DCA
3 stops41h 08m
Multiple Airlines
Fri 10/706:00
DCA
-
CWL
2 stops23h 15m
Multiple Airlines
Deal found 8/6£634
Wed 4/1110:20
CWL
-
IAD
2 stops17h 42m
Delta
Wed 11/1117:30
IAD
-
CWL
2 stops18h 30m
Delta
Deal found 6/6£639
Mon 6/722:10
CWL
-
IAD
2 stops28h 16m
Multiple Airlines
Mon 13/709:55
IAD
-
CWL
1 stop19h 20m
Multiple Airlines
Deal found 6/6£645
Wed 4/1117:30
CWL
-
IAD
1 stop27h 15m
Virgin Atlantic
Wed 11/1118:20
IAD
-
CWL
1 stop10h 30m
Virgin Atlantic
Deal found 6/6£657
Mon 6/709:45
CWL
-
IAD
1 stop10h 50m
Delta
Mon 13/718:10
IAD
-
CWL
1 stop10h 05m
Delta
Deal found 6/6£694
Mon 6/722:10
CWL
-
IAD
3 stops28h 03m
Multiple Airlines
Fri 10/716:20
IAD
-
CWL
1 stop12h 55m
Multiple Airlines
Deal found 8/6£696
Thu 11/609:45
CWL
-
IAD
1 stop10h 50m
Delta
Thu 18/617:40
IAD
-
CWL
1 stop18h 05m
Delta
Deal found 4/6£696
Mon 6/709:45
CWL
-
BWI
2 stops17h 39m
Delta
Mon 13/713:45
BWI
-
CWL
2 stops14h 30m
Delta
Deal found 6/6£699
Fri 7/809:45
CWL
-
BWI
2 stops17h 54m
KLM
Fri 14/814:18
BWI
-
CWL
2 stops13h 57m
KLM
Deal found 8/6£820
Thu 11/609:45
CWL
-
BWI
2 stops16h 40m
Delta
Thu 18/610:33
BWI
-
CWL
2 stops17h 42m
Delta
Deal found 4/6£859
Thu 11/609:45
CWL
-
DCA
2 stops18h 14m
Delta
Thu 18/611:00
DCA
-
CWL
2 stops17h 15m
Delta
Deal found 4/6£904

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 8 June 2026.

Round-trip from

£618
6/7-13/7
  • 6/7-13/7
  • 3 total stops
  • 39h 41m 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 8 June 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

Cheapest return flight

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Mon 6/7

22:10-22:31

2 stops29h 21m

Washington, D.C. Reagan-National

Mon 13/7

18:55-10:15

1 stop10h 20m

£618

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Mon 6/7

22:10-10:18

3 stops41h 08m

Washington, D.C. Reagan-National

Fri 10/7

06:00-10:15

2 stops23h 15m

£634

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 4/11

10:20-23:02

2 stops17h 42m

Washington, D.C. Dulles Intl

Wed 11/11

18:20-09:50

1 stop10h 30m

£639

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 6/7

22:10-21:26

2 stops28h 16m

Washington, D.C. Dulles Intl

Mon 13/7

09:55-10:15

1 stop19h 20m

£645

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 4/11

17:30-15:45

1 stop27h 15m

Washington, D.C. Dulles Intl

Wed 11/11

18:20-09:50

1 stop10h 30m

£657
Fastest return journey

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 6/7

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Mon 13/7

18:10-09:15

1 stop10h 05m

£694

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 6/7

22:10-21:13

3 stops28h 03m

Washington, D.C. Dulles Intl

Fri 10/7

16:20-10:15

1 stop12h 55m

£696

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Mon 6/7

09:45-22:24

2 stops17h 39m

Baltimore/Washington

Mon 13/7

13:45-09:15

2 stops14h 30m

£699

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 6/7

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Fri 10/7

17:40-09:15

1 stop10h 35m

£816

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 4/8

23:15-20:35

2 stops26h 20m

Washington, D.C. Dulles Intl

Wed 12/8

09:45-10:15

2 stops19h 30m

£820

Flights are sorted by cheapest return flights first.

Deals found on 6/6

Showing 1-10 of 17 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.
No data available for this route at this time. Please check back soon.

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 8 June 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
7.8
Good
1,527 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,527 reviews
KLM
7.8
Good
1,527 reviews
Check prices

Food

7.3

Boarding

7.8

Comfort

7.7

Crew

8.4

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 42m. Fly via Delta, Virgin Atlantic, or WestJet to get the fastest option. 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.

  • 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 - Washington, D.C. Dulles Intl. You may also consider Cardiff Wales - Baltimore/Washington or Cardiff Wales - Washington, D.C. Reagan-National.

  • 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.

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
Gaithersburg
Woodbridge
Alexandria

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Cardiff to Washington, D.C.?

When you search for this flight from Cardiff to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.