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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £577

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 7/2. 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.
KLM Logo
18:05 - 16:50
IAD
-
CWL
17h 45m1 stop
KLM Logo
17:25 - 16:05
CWL
-
IAD
27h 40m1 stop
£577KLM
Sat, 7 Feb - Sat, 14 Feb
KLM Logo
18:05 - 09:50
IAD
-
CWL
10h 45m1 stop
KLM Logo
17:30 - 16:05
CWL
-
IAD
27h 35m1 stop
£578KLM
Sun, 8 Feb - Sun, 15 Feb
KLM Logo
12:32 - 09:50
IAD
-
CWL
16h 18m2 stops
KLM Logo
17:15 - 16:05
CWL
-
IAD
27h 50m1 stop
£581KLM
Fri, 6 Feb - Fri, 13 Feb
KLM Logo
12:32 - 09:50
IAD
-
CWL
16h 18m2 stops
KLM Logo
17:30 - 16:05
CWL
-
IAD
27h 35m1 stop
£582KLM
Sun, 8 Feb - Sun, 15 Feb
Delta Logo
15:42 - 16:55
IAD
-
CWL
20h 13m2 stops
Delta Logo
10:20 - 23:09
CWL
-
IAD
17h 49m2 stops
£588Delta
Fri, 6 Feb - Fri, 13 Feb
Delta Logo
12:40 - 09:50
IAD
-
CWL
16h 10m2 stops
Delta Logo
10:15 - 00:21
CWL
-
IAD
19h 06m2 stops
£636Delta
Sun, 8 Feb - Sun, 15 Feb
KLM Logo
13:19 - 09:15
IAD
-
CWL
14h 56m2 stops
KLM Logo
17:35 - 15:35
CWL
-
IAD
27h 00m1 stop
£715KLM
Thu, 9 Apr - Sat, 18 Apr
Multiple Airlines Logo
17:05 - 19:40
IAD
-
CWL
21h 35m1 stop
Multiple Airlines Logo
22:25 - 15:35
CWL
-
IAD
22h 10m1 stop
£761Multiple Airlines
Fri, 6 Feb - Fri, 13 Feb
Virgin Atlantic Logo
17:40 - 09:15
IAD
-
CWL
10h 35m1 stop
Virgin Atlantic Logo
09:45 - 15:35
CWL
-
IAD
10h 50m1 stop
£862Virgin Atlantic
Fri, 22 May - Sat, 30 May
KLM Logo
21:45 - 16:45
IAD
-
CWL
14h 00m2 stops
KLM Logo
09:45 - 19:35
CWL
-
IAD
14h 50m2 stops
£876KLM
Thu, 9 Apr - Sat, 18 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
7 Feb
IAD18:05Washington, D.C. Dulles Intl
17h 45m
1 stop
CWL16:50Cardiff Wales
14 Feb
CWL17:25Cardiff Wales
27h 40m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£577
Find similar
KLM
8 Feb
IAD18:05Washington, D.C. Dulles Intl
10h 45m
1 stop
CWL09:50Cardiff Wales
15 Feb
CWL17:30Cardiff Wales
27h 35m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£578
Find similar
KLM
6 Feb
IAD12:32Washington, D.C. Dulles Intl
16h 18m
2 stops
CWL09:50Cardiff Wales
13 Feb
CWL17:15Cardiff Wales
27h 50m
1 stop
IAD16:05Washington, D.C. Dulles Intl
£581
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
6 Feb
IAD15:42Washington, D.C. Dulles Intl
20h 13m
2 stops
CWL16:55Cardiff Wales
13 Feb
CWL10:20Cardiff Wales
17h 49m
2 stops
IAD23:09Washington, D.C. Dulles Intl
£588
Find similar
Delta
8 Feb
IAD12:40Washington, D.C. Dulles Intl
16h 10m
2 stops
CWL09:50Cardiff Wales
15 Feb
CWL10:15Cardiff Wales
19h 06m
2 stops
IAD00:21Washington, D.C. Dulles Intl
£636
Find similar
Delta
27 Dec
IAD18:05Washington, D.C. Dulles Intl
17h 45m
1 stop
CWL16:50Cardiff Wales
31 Dec
CWL10:20Cardiff Wales
28h 29m
2 stops
IAD09:49Washington, D.C. Dulles Intl
£1,601
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 26 December 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 7/2

18:05-16:50

1 stop17h 45m

Cardiff Wales

Sat 14/2

17:25-16:05

1 stop27h 40m

£577

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 8/2

18:05-09:50

1 stop10h 45m

Cardiff Wales

Sun 15/2

17:30-16:05

1 stop27h 35m

£578

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 6/2

12:32-09:50

2 stops16h 18m

Cardiff Wales

Fri 13/2

17:15-16:05

1 stop27h 50m

£581

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 8/2

12:32-09:50

2 stops16h 18m

Cardiff Wales

Sun 15/2

17:30-16:05

1 stop27h 35m

£582

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 6/2

15:42-16:55

2 stops20h 13m

Cardiff Wales

Fri 13/2

10:20-23:09

2 stops17h 49m

£588

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 8/2

12:40-09:50

2 stops16h 10m

Cardiff Wales

Sun 15/2

10:15-00:21

2 stops19h 06m

£636

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 9/4

13:19-09:15

2 stops14h 56m

Cardiff Wales

Sat 18/4

17:35-15:35

1 stop27h 00m

£715

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 6/2

17:05-19:40

1 stop21h 35m

Cardiff Wales

Fri 13/2

22:25-15:35

1 stop22h 10m

£761

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 22/5

17:40-09:15

1 stop10h 35m

Cardiff Wales

Sat 30/5

09:45-15:35

1 stop10h 50m

£862

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 9/4

21:45-16:45

2 stops14h 00m

Cardiff Wales

Sat 18/4

09:45-19:35

2 stops14h 50m

£876

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

Fastest flight time

10h 35m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Cardiff takes 10h 35m
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

  • 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 35m, 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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Airports servicing Wales

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