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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £171

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 1/9. 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

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
16:00 - 23:25
IAD
-
CWL
26h 25m
2 stops
Multiple Airlines Logo
23:15 - 20:25
CWL
-
IAD
26h 10m
3 stops
£568Multiple Airlines
Tue, 15 Sep - Tue, 22 Sep
Multiple Airlines Logo
20:30 - 23:25
IAD
-
CWL
21h 55m
3 stops
Multiple Airlines Logo
23:15 - 20:25
CWL
-
IAD
26h 10m
3 stops
£570Multiple Airlines
Tue, 15 Sep - Tue, 22 Sep
Multiple Airlines Logo
18:05 - 08:10
IAD
-
CWL
10h 05m
1 stop
Multiple Airlines Logo
17:30 - 19:05
CWL
-
IAD
30h 35m
2 stops
£627Multiple Airlines
Sun, 25 Oct - Thu, 26 Nov
Multiple Airlines Logo
22:00 - 13:00
IAD
-
CWL
11h 00m
1 stop
Multiple Airlines Logo
17:30 - 19:05
CWL
-
IAD
30h 35m
2 stops
£631Multiple Airlines
Wed, 28 Oct - Thu, 26 Nov
Multiple Airlines Logo
11:25 - 22:20
IAD
-
CWL
29h 55m
2 stops
Multiple Airlines Logo
08:15 - 15:35
CWL
-
IAD
12h 20m
1 stop
£663Multiple Airlines
Thu, 22 Oct - Sat, 21 Nov
Multiple Airlines Logo
16:00 - 23:25
IAD
-
CWL
26h 25m
2 stops
Multiple Airlines Logo
15:00 - 19:25
CWL
-
IAD
33h 25m
2 stops
£666Multiple Airlines
Tue, 15 Sep - Tue, 22 Sep
Multiple Airlines Logo
11:25 - 22:20
IAD
-
CWL
29h 55m
2 stops
Multiple Airlines Logo
08:35 - 15:35
CWL
-
IAD
12h 00m
1 stop
£672Multiple Airlines
Thu, 22 Oct - Mon, 23 Nov
Multiple Airlines Logo
18:15 - 14:55
IAD
-
CWL
15h 40m
1 stop
Multiple Airlines Logo
17:30 - 19:05
CWL
-
IAD
30h 35m
2 stops
£678Multiple Airlines
Sat, 24 Oct - Thu, 26 Nov
Multiple Airlines Logo
18:05 - 08:10
IAD
-
CWL
10h 05m
1 stop
Multiple Airlines Logo
09:05 - 16:20
CWL
-
IAD
36h 15m
2 stops
£680Multiple Airlines
Sun, 25 Oct - Sun, 22 Nov
Multiple Airlines Logo
22:00 - 13:00
IAD
-
CWL
11h 00m
1 stop
Multiple Airlines Logo
09:05 - 16:20
CWL
-
IAD
36h 15m
2 stops
£684Multiple Airlines
Wed, 28 Oct - Sun, 22 Nov

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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
25 Oct
IAD18:45Washington, D.C. Dulles Intl
11h 05m
1 stop
CWL09:50Cardiff Wales
24 Nov
CWL17:30Cardiff Wales
27h 25m
1 stop
IAD15:55Washington, D.C. Dulles Intl
£835
KLM
24 Oct
IAD17:40Washington, D.C. Dulles Intl
12h 10m
1 stop
CWL10:50Cardiff Wales
24 Nov
CWL17:30Cardiff Wales
27h 25m
1 stop
IAD15:55Washington, D.C. Dulles Intl
£873

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 Oct
IAD18:45Washington, D.C. Dulles Intl
18h 15m
1 stop
CWL17:00Cardiff Wales
20 Nov
CWL10:20Cardiff Wales
27h 51m
2 stops
IAD09:11Washington, D.C. Dulles Intl
£843
Delta
25 Oct
IAD17:13Washington, D.C. Dulles Intl
19h 47m
2 stops
CWL17:00Cardiff Wales
25 Nov
CWL10:20Cardiff Wales
18h 01m
2 stops
IAD23:21Washington, D.C. Dulles Intl
£846
Delta
2 Aug
IAD17:40Washington, D.C. Dulles Intl
18h 05m
1 stop
CWL16:45Cardiff Wales
11 Aug
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£1,038

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 28 July 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

Tue 15/9

16:00-23:25

2 stops26h 25m

Cardiff Wales

Tue 22/9

23:15-20:25

3 stops26h 10m

£568

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 15/9

20:30-23:25

3 stops21h 55m

Cardiff Wales

Tue 22/9

23:15-20:25

3 stops26h 10m

£570
Fastest return journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 25/10

18:05-08:10

1 stop10h 05m

Cardiff Wales

Thu 26/11

17:30-19:05

2 stops30h 35m

£627

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 28/10

22:00-13:00

1 stop11h 00m

Cardiff Wales

Thu 26/11

17:30-19:05

2 stops30h 35m

£631

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 22/10

11:25-22:20

2 stops29h 55m

Cardiff Wales

Sat 21/11

08:15-15:35

1 stop12h 20m

£663

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 15/9

16:00-23:25

2 stops26h 25m

Cardiff Wales

Tue 22/9

15:00-19:25

2 stops33h 25m

£666

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 22/10

11:25-22:20

2 stops29h 55m

Cardiff Wales

Mon 23/11

08:35-15:35

1 stop12h 00m

£672

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 24/10

18:15-14:55

1 stop15h 40m

Cardiff Wales

Thu 26/11

17:30-19:05

2 stops30h 35m

£678

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 25/10

18:05-08:10

1 stop10h 05m

Cardiff Wales

Sun 22/11

09:05-16:20

2 stops36h 15m

£680

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 28/10

22:00-13:00

1 stop11h 00m

Cardiff Wales

Sun 22/11

09:05-16:20

2 stops36h 15m

£684

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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.

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

  • 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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