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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £532

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 27/2. 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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0 bags
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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
19:40 - 19:40IAD-CWL
19h 00m2 stops
Multiple Airlines Logo
22:25 - 18:30CWL-IAD
25h 05m2 stops
£532Multiple Airlines
Find Deal
Fri, 27 Feb - Fri, 6 Mar
Multiple Airlines Logo
17:05 - 15:30IAD-CWL
17h 25m1 stop
Multiple Airlines Logo
14:00 - 16:30CWL-IAD
31h 30m2 stops
£581Multiple Airlines
Find Deal
Tue, 10 Feb - Wed, 18 Feb
KLM Logo
18:05 - 09:50IAD-CWL
10h 45m1 stop
KLM Logo
17:25 - 16:05CWL-IAD
27h 40m1 stop
£595KLM
Find Deal
Tue, 10 Feb - Wed, 18 Feb
KLM Logo
12:35 - 09:50IAD-CWL
16h 15m2 stops
KLM Logo
17:25 - 16:05CWL-IAD
27h 40m1 stop
£598KLM
Find Deal
Thu, 26 Feb - Wed, 4 Mar
Delta Logo
18:05 - 16:55IAD-CWL
17h 50m1 stop
Delta Logo
10:20 - 19:11CWL-IAD
13h 51m2 stops
£603Delta
Find Deal
Fri, 27 Feb - Fri, 6 Mar
KLM Logo
17:50 - 16:45IAD-CWL
17h 55m1 stop
KLM Logo
09:50 - 15:35CWL-IAD
10h 45m1 stop
£604KLM
Find Deal
Wed, 1 Apr - Wed, 8 Apr
KLM Logo
12:40 - 09:50IAD-CWL
16h 10m2 stops
KLM Logo
10:20 - 00:24CWL-IAD
19h 04m2 stops
£606KLM
Find Deal
Tue, 10 Feb - Wed, 18 Feb
Delta Logo
19:50 - 16:45IAD-CWL
15h 55m2 stops
Delta Logo
09:50 - 15:35CWL-IAD
10h 45m1 stop
£607Delta
Find Deal
Wed, 1 Apr - Wed, 8 Apr
Air France Logo
17:50 - 16:45IAD-CWL
17h 55m1 stop
Air France Logo
17:15 - 15:35CWL-IAD
27h 20m1 stop
£644Air France
Find Deal
Wed, 1 Apr - Sun, 5 Apr
Air France Logo
06:15 - 16:45IAD-CWL
29h 30m2 stops
Air France Logo
17:15 - 15:35CWL-IAD
27h 20m1 stop
£647Air France
Find Deal
Wed, 1 Apr - Sun, 5 Apr

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
10 Feb
IAD18:05Washington, D.C. Dulles Intl
10h 45m
1 stop
CWL09:50Cardiff Wales
18 Feb
CWL17:25Cardiff Wales
27h 40m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£595
Find similar
KLM
26 Feb
IAD12:35Washington, D.C. Dulles Intl
16h 15m
2 stops
CWL09:50Cardiff Wales
4 Mar
CWL17:25Cardiff Wales
27h 40m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£598
Find similar
KLM
1 Apr
IAD17:50Washington, D.C. Dulles Intl
17h 55m
1 stop
CWL16:45Cardiff Wales
8 Apr
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£604
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
27 Feb
IAD18:05Washington, D.C. Dulles Intl
17h 50m
1 stop
CWL16:55Cardiff Wales
6 Mar
CWL10:20Cardiff Wales
13h 51m
2 stops
IAD19:11Washington, D.C. Dulles Intl
£603
Find similar
Delta
1 Apr
IAD19:50Washington, D.C. Dulles Intl
15h 55m
2 stops
CWL16:45Cardiff Wales
8 Apr
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£607
Find similar
Delta
1 Apr
IAD06:00Washington, D.C. Dulles Intl
22h 15m
2 stops
CWL09:15Cardiff Wales
5 Apr
CWL09:50Cardiff Wales
10h 45m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£609
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 7 November 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

Fri 27/2

19:40-19:40

2 stops19h 00m

Cardiff Wales

Fri 6/3

22:25-18:30

2 stops25h 05m

£532

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 10/2

17:05-15:30

1 stop17h 25m

Cardiff Wales

Wed 18/2

14:00-16:30

2 stops31h 30m

£581

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 10/2

18:05-09:50

1 stop10h 45m

Cardiff Wales

Wed 18/2

17:25-16:05

1 stop27h 40m

£595

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 26/2

12:35-09:50

2 stops16h 15m

Cardiff Wales

Wed 4/3

17:25-16:05

1 stop27h 40m

£598

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 27/2

18:05-16:55

1 stop17h 50m

Cardiff Wales

Fri 6/3

10:20-19:11

2 stops13h 51m

£603

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 1/4

17:50-16:45

1 stop17h 55m

Cardiff Wales

Wed 8/4

09:50-15:35

1 stop10h 45m

£604

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 10/2

12:40-09:50

2 stops16h 10m

Cardiff Wales

Wed 18/2

10:20-00:24

2 stops19h 04m

£606

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 1/4

19:50-16:45

2 stops15h 55m

Cardiff Wales

Wed 8/4

09:50-15:35

1 stop10h 45m

£607

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 1/4

17:50-16:45

1 stop17h 55m

Cardiff Wales

Sun 5/4

17:15-15:35

1 stop27h 20m

£644

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 1/4

06:15-16:45

2 stops29h 30m

Cardiff Wales

Sun 5/4

17:15-15:35

1 stop27h 20m

£647

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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