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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £381

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Cardiff departing on 20/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags
Voted winner of Europe's Best Travel App 2023

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Cardiff

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
15:50 - 10:15
IAD
-
CWL
13h 25m
1 stop
Multiple Airlines Logo
23:15 - 15:10
CWL
-
IAD
44h 55m
2 stops
£543Multiple Airlines
Mon, 3 Aug - Wed, 19 Aug
Multiple Airlines Logo
17:15 - 22:25
IAD
-
CWL
24h 10m
1 stop
Multiple Airlines Logo
23:15 - 10:45
CWL
-
IAD
40h 30m
2 stops
£570Multiple Airlines
Wed, 12 Aug - Wed, 19 Aug
Multiple Airlines Logo
20:55 - 22:25
IAD
-
CWL
20h 30m
1 stop
Multiple Airlines Logo
23:15 - 10:45
CWL
-
IAD
40h 30m
2 stops
£654Multiple Airlines
Wed, 5 Aug - Wed, 12 Aug
Multiple Airlines Logo
20:30 - 22:50
IAD
-
CWL
21h 20m
3 stops
Multiple Airlines Logo
23:15 - 20:24
CWL
-
IAD
26h 09m
2 stops
£658Multiple Airlines
Mon, 3 Aug - Wed, 19 Aug
Multiple Airlines Logo
21:05 - 23:25
IAD
-
CWL
21h 20m
1 stop
Multiple Airlines Logo
17:40 - 15:30
CWL
-
IAD
26h 50m
2 stops
£664Multiple Airlines
Tue, 15 Sep - Sun, 27 Sep
Multiple Airlines Logo
20:55 - 21:45
IAD
-
CWL
19h 50m
1 stop
Multiple Airlines Logo
17:40 - 15:30
CWL
-
IAD
26h 50m
2 stops
£666Multiple Airlines
Sun, 20 Sep - Sun, 27 Sep
Multiple Airlines Logo
21:05 - 23:25
IAD
-
CWL
21h 20m
1 stop
Multiple Airlines Logo
16:15 - 15:30
CWL
-
IAD
28h 15m
2 stops
£666Multiple Airlines
Tue, 15 Sep - Tue, 22 Sep
Multiple Airlines Logo
21:05 - 23:25
IAD
-
CWL
21h 20m
1 stop
Multiple Airlines Logo
22:10 - 18:50
CWL
-
IAD
25h 40m
2 stops
£671Multiple Airlines
Tue, 15 Sep - Mon, 28 Sep
Multiple Airlines Logo
20:55 - 21:45
IAD
-
CWL
19h 50m
1 stop
Multiple Airlines Logo
22:10 - 18:50
CWL
-
IAD
25h 40m
2 stops
£672Multiple Airlines
Sun, 20 Sep - Mon, 28 Sep
Multiple Airlines Logo
20:55 - 21:45
IAD
-
CWL
19h 50m
1 stop
Multiple Airlines Logo
17:45 - 19:10
CWL
-
IAD
30h 25m
2 stops
£675Multiple Airlines
Sun, 20 Sep - Fri, 25 Sep

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Customise your flight search to find flights from Washington, D.C. Dulles Intl Airport to Cardiff 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, momondo users made 279,928 searches. Data last updated 16 June 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Cardiff that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 3/8

15:50-10:15

1 stop13h 25m

Cardiff Wales

Wed 19/8

23:15-15:10

2 stops44h 55m

£543

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 12/8

17:15-22:25

1 stop24h 10m

Cardiff Wales

Wed 19/8

23:15-10:45

2 stops40h 30m

£570

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 5/8

20:55-22:25

1 stop20h 30m

Cardiff Wales

Wed 12/8

23:15-10:45

2 stops40h 30m

£654

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 3/8

20:30-22:50

3 stops21h 20m

Cardiff Wales

Wed 19/8

23:15-20:24

2 stops26h 09m

£658

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 15/9

21:05-23:25

1 stop21h 20m

Cardiff Wales

Sun 27/9

17:40-15:30

2 stops26h 50m

£664

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 20/9

20:55-21:45

1 stop19h 50m

Cardiff Wales

Sun 27/9

17:40-15:30

2 stops26h 50m

£666

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 15/9

21:05-23:25

1 stop21h 20m

Cardiff Wales

Tue 22/9

16:15-15:30

2 stops28h 15m

£666

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 15/9

21:05-23:25

1 stop21h 20m

Cardiff Wales

Mon 28/9

22:10-18:50

2 stops25h 40m

£671
Fastest return journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 20/9

20:55-21:45

1 stop19h 50m

Cardiff Wales

Mon 28/9

22:10-18:50

2 stops25h 40m

£672

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 20/9

20:55-21:45

1 stop19h 50m

Cardiff Wales

Fri 25/9

17:45-19:10

2 stops30h 25m

£675

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

See travel insights to Cardiff from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Cardiff

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Cardiff Wales?

Delta and KLM are the most popular carriers operating from Washington, D.C. Dulles Intl to Cardiff Wales

When to book flights from Washington, D.C. Dulles Intl Airport to Cardiff

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Cardiff according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Washington, D.C. Dulles Intl Airport to Cardiff (IAD to CWL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Cardiff

Fastest flight time

10h 05m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Cardiff takes 10h 05m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Cardiff. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Cardiff.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Cardiff

  • How far is Washington, D.C. Dulles Intl to Cardiff Wales by plane?

    A flight from Washington, D.C. Dulles Intl to Cardiff Wales will travel around 3552.6 mi. Flights usually cover this in 10h 05m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Cardiff Wales Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to Cardiff Wales Airport refresh daily.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Cardiff Wales Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Cardiff Wales Airport.

  • What documentation or ID do you need to fly to Cardiff Wales Airport?

    The required travel and health documents for your Cardiff Wales Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Cardiff Wales Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Barry
Bridgend

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Cardiff?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Cardiff. momondo saves you time and could save you money on your trip.

Can I find flights from Washington, D.C. to Cardiff with flexible booking policies on momondo?

Flights from Washington, D.C. to Cardiff with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Cardiff?

Once all potential Washington, D.C. to Cardiff flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington, D.C. to Cardiff right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Cardiff from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Cardiff trip

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