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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £477

This is the cheapest return 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 25/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Cardiff

Cheap return flights

Logo
18:20 - 10:50IAD-CWL
11h 30m1 stop
Logo
23:45 - 16:35CWL-IAD
20h 50m1 stop
£477
Find Deal
Sat, 25 Oct - Sat, 1 Nov
Logo
17:00 - 21:55IAD-CWL
23h 55m3 stops
Logo
20:05 - 22:00CWL-IAD
29h 55m2 stops
£592
Find Deal
Sat, 25 Oct - Sat, 1 Nov
Virgin Atlantic Logo
19:05 - 09:50IAD-CWL
10h 45m1 stop
Virgin Atlantic Logo
17:30 - 16:05CWL-IAD
27h 35m1 stop
£596Virgin Atlantic
Find Deal
Sun, 26 Oct - Sun, 2 Nov
KLM Logo
17:25 - 16:45IAD-CWL
18h 20m1 stop
KLM Logo
09:50 - 15:35CWL-IAD
10h 45m1 stop
£609KLM
Find Deal
Mon, 13 Oct - Wed, 22 Oct
KLM Logo
17:25 - 16:45IAD-CWL
18h 20m1 stop
KLM Logo
09:50 - 15:35CWL-IAD
10h 45m1 stop
£610KLM
Find Deal
Mon, 13 Oct - Wed, 22 Oct
KLM Logo
13:00 - 09:15IAD-CWL
15h 15m2 stops
KLM Logo
09:50 - 15:35CWL-IAD
10h 45m1 stop
£613KLM
Find Deal
Mon, 13 Oct - Wed, 22 Oct
KLM Logo
18:05 - 09:50IAD-CWL
10h 45m1 stop
KLM Logo
17:25 - 16:05CWL-IAD
27h 40m1 stop
£616KLM
Find Deal
Sun, 15 Feb - Sat, 28 Feb
Delta Logo
19:05 - 09:50IAD-CWL
10h 45m1 stop
Delta Logo
10:20 - 23:03CWL-IAD
17h 43m2 stops
£616Delta
Find Deal
Thu, 30 Oct - Thu, 13 Nov
Delta Logo
19:05 - 16:45IAD-CWL
17h 40m1 stop
Delta Logo
10:20 - 00:18CWL-IAD
18h 58m2 stops
£617Delta
Find Deal
Thu, 30 Oct - Thu, 13 Nov
KLM Logo
12:30 - 09:50IAD-CWL
16h 20m2 stops
KLM Logo
17:25 - 16:05CWL-IAD
27h 40m1 stop
£619KLM
Find Deal
Sun, 15 Feb - Sat, 28 Feb

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

Our best KLM deals on Washington, D.C. Dulles Intl Airport to Cardiff flight tickets
KLM
13 Oct
IAD17:25Washington, D.C. Dulles Intl
18h 20m
1 stop
CWL16:45Cardiff Wales
22 Oct
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£609
Find similar
KLM
13 Oct
IAD17:25Washington, D.C. Dulles Intl
18h 20m
1 stop
CWL16:45Cardiff Wales
22 Oct
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£610
Find similar
KLM
13 Oct
IAD13:00Washington, D.C. Dulles Intl
15h 15m
2 stops
CWL09:15Cardiff Wales
22 Oct
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£613
Find similar

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

Our best Delta deals on Washington, D.C. Dulles Intl Airport to Cardiff flight tickets
Delta
30 Oct
IAD19:05Washington, D.C. Dulles Intl
10h 45m
1 stop
CWL09:50Cardiff Wales
13 Nov
CWL10:20Cardiff Wales
17h 43m
2 stops
IAD23:03Washington, D.C. Dulles Intl
£616
Find similar
Delta
30 Oct
IAD19:05Washington, D.C. Dulles Intl
17h 40m
1 stop
CWL16:45Cardiff Wales
13 Nov
CWL10:20Cardiff Wales
18h 58m
2 stops
IAD00:18Washington, D.C. Dulles Intl
£617
Find similar
Delta
12 Nov
IAD12:11Washington, D.C. Dulles Intl
16h 39m
2 stops
CWL09:50Cardiff Wales
16 Nov
CWL10:20Cardiff Wales
41h 43m
2 stops
IAD23:03Washington, D.C. Dulles Intl
£619
Find similar

momondo Fare Finder

 
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 12 September 2025.
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

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 25/10

18:20-10:50

1 stop11h 30m

Cardiff Wales

Sat 1/11

23:45-16:35

1 stop20h 50m

£477

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 25/10

17:00-21:55

3 stops23h 55m

Cardiff Wales

Sat 1/11

20:05-22:00

2 stops29h 55m

£592

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 26/10

19:05-09:50

1 stop10h 45m

Cardiff Wales

Sun 2/11

17:30-16:05

1 stop27h 35m

£596

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/10

17:25-16:45

1 stop18h 20m

Cardiff Wales

Wed 22/10

09:50-15:35

1 stop10h 45m

£609

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/10

17:25-16:45

1 stop18h 20m

Cardiff Wales

Wed 22/10

09:50-15:35

1 stop10h 45m

£610

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/10

13:00-09:15

2 stops15h 15m

Cardiff Wales

Wed 22/10

09:50-15:35

1 stop10h 45m

£613

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 15/2

18:05-09:50

1 stop10h 45m

Cardiff Wales

Sat 28/2

17:25-16:05

1 stop27h 40m

£616

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 30/10

19:05-09:50

1 stop10h 45m

Cardiff Wales

Thu 13/11

10:20-23:03

2 stops17h 43m

£616

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 30/10

19:05-16:45

1 stop17h 40m

Cardiff Wales

Thu 13/11

10:20-00:18

2 stops18h 58m

£617

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 15/2

12:30-09:50

2 stops16h 20m

Cardiff Wales

Sat 28/2

17:25-16:05

1 stop27h 40m

£619

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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

Direct flights

None
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.
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  • 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 45m, 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.

  • How do I get Price Alerts for flights from Washington, D.C. Dulles Intl Airport to Cardiff?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Washington, D.C. Dulles Intl Airport from Cardiff. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Washington, D.C. Dulles Intl Airport to Cardiff with momondo?

    Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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.

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