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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from $386

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 5/11. 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 round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:05 pm - 10:15 am
IAD
-
CWL
13h 10m
1 stop
Multiple Airlines Logo
11:30 pm - 8:29 pm
CWL
-
IAD
25h 59m
3 stops
$781Multiple Airlines
Mi, Mai 27 - Mi, Jun 3
Multiple Airlines Logo
8:18 am - 10:15 am
IAD
-
CWL
20h 57m
2 stops
Multiple Airlines Logo
11:30 pm - 8:29 pm
CWL
-
IAD
25h 59m
3 stops
$834Multiple Airlines
Mi, Mai 27 - Mi, Jun 3
Multiple Airlines Logo
4:05 pm - 11:05 pm
IAD
-
CWL
26h 00m
2 stops
Multiple Airlines Logo
11:15 pm - 8:29 pm
CWL
-
IAD
26h 14m
2 stops
$870Multiple Airlines
Di, Mai 26 - Di, Jun 2
Multiple Airlines Logo
8:18 am - 10:15 am
IAD
-
CWL
20h 57m
3 stops
Multiple Airlines Logo
11:30 pm - 8:29 pm
CWL
-
IAD
25h 59m
3 stops
$880Multiple Airlines
Mi, Mai 27 - Mi, Jun 3
Multiple Airlines Logo
4:05 pm - 11:05 pm
IAD
-
CWL
26h 00m
2 stops
Multiple Airlines Logo
11:15 pm - 9:13 pm
CWL
-
IAD
26h 58m
3 stops
$884Multiple Airlines
Di, Mai 26 - Di, Jun 2
Multiple Airlines Logo
4:05 pm - 10:15 am
IAD
-
CWL
13h 10m
1 stop
Multiple Airlines Logo
11:30 pm - 8:29 pm
CWL
-
IAD
25h 59m
2 stops
$913Multiple Airlines
Mi, Mai 27 - Mi, Jun 3
Multiple Airlines Logo
8:25 am - 4:45 pm
IAD
-
CWL
27h 20m
3 stops
Multiple Airlines Logo
11:15 pm - 9:13 pm
CWL
-
IAD
26h 58m
3 stops
$959Multiple Airlines
Di, Mai 26 - Di, Jun 2
Multiple Airlines Logo
5:15 pm - 10:15 am
IAD
-
CWL
12h 00m
1 stop
Multiple Airlines Logo
11:35 am - 9:13 pm
CWL
-
IAD
14h 38m
2 stops
$972Multiple Airlines
Mo, Jun 1 - Sa, Jun 20
Multiple Airlines Logo
4:05 pm - 11:05 pm
IAD
-
CWL
26h 00m
2 stops
Multiple Airlines Logo
11:35 am - 9:26 pm
CWL
-
IAD
14h 51m
1 stop
$973Multiple Airlines
Di, Mai 26 - Di, Jun 2
Multiple Airlines Logo
9:55 am - 10:15 am
IAD
-
CWL
19h 20m
1 stop
Multiple Airlines Logo
11:30 pm - 3:45 pm
CWL
-
IAD
21h 15m
1 stop
$991Multiple Airlines
Mi, Mai 27 - Mi, Jun 3

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

Our best Virgin Atlantic deals on Washington, D.C. Dulles Intl Airport to Cardiff flight tickets
Virgin Atlantic
Apr 29
IAD6:10 pmWashington, D.C. Dulles Intl
10h 05m
1 stop
CWL9:15 amCardiff Wales
May 3
CWL9:50 amCardiff Wales
10h 45m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,288
Virgin Atlantic
May 26
IAD5:40 pmWashington, D.C. Dulles Intl
10h 35m
1 stop
CWL9:15 amCardiff Wales
Jun 2
CWL9:45 amCardiff Wales
10h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,295
Virgin Atlantic
May 26
IAD5:40 pmWashington, D.C. Dulles Intl
10h 35m
1 stop
CWL9:15 amCardiff Wales
Jun 2
CWL9:45 amCardiff Wales
10h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,299

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
May 18
IAD6:10 pmWashington, D.C. Dulles Intl
17h 35m
1 stop
CWL4:45 pmCardiff Wales
May 25
CWL5:15 pmCardiff Wales
27h 20m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,337
KLM
May 1
IAD5:40 pmWashington, D.C. Dulles Intl
10h 35m
1 stop
CWL9:15 amCardiff Wales
May 9
CWL5:35 pmCardiff Wales
27h 00m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,370
KLM
May 1
IAD5:40 pmWashington, D.C. Dulles Intl
18h 25m
1 stop
CWL5:05 pmCardiff Wales
May 9
CWL9:45 amCardiff Wales
18h 11m
2 stops
IAD10:56 pmWashington, D.C. Dulles Intl
$1,380

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated April 16, 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 round-trip

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mi 5/27

4:05 pm-10:15 am

1 stop13h 10m

Cardiff Wales

Mi 6/3

11:30 pm-8:29 pm

3 stops25h 59m

$781

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mi 5/27

8:18 am-10:15 am

2 stops20h 57m

Cardiff Wales

Mi 6/3

11:30 pm-8:29 pm

3 stops25h 59m

$834

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Di 5/26

4:05 pm-11:05 pm

2 stops26h 00m

Cardiff Wales

Di 6/2

11:15 pm-8:29 pm

2 stops26h 14m

$870

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mi 5/27

8:18 am-10:15 am

3 stops20h 57m

Cardiff Wales

Mi 6/3

11:30 pm-8:29 pm

3 stops25h 59m

$880

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Di 5/26

4:05 pm-11:05 pm

2 stops26h 00m

Cardiff Wales

Di 6/2

11:15 pm-9:13 pm

3 stops26h 58m

$884

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mi 5/27

4:05 pm-10:15 am

1 stop13h 10m

Cardiff Wales

Mi 6/3

11:30 pm-8:29 pm

2 stops25h 59m

$913

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Di 5/26

8:25 am-4:45 pm

3 stops27h 20m

Cardiff Wales

Di 6/2

11:15 pm-9:13 pm

3 stops26h 58m

$959
Quickest round-trip

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mo 6/1

5:15 pm-10:15 am

1 stop12h 00m

Cardiff Wales

Sa 6/20

11:35 am-9:13 pm

2 stops14h 38m

$972

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Di 5/26

4:05 pm-11:05 pm

2 stops26h 00m

Cardiff Wales

Di 6/2

11:35 am-9:26 pm

1 stop14h 51m

$973

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mi 5/27

9:55 am-10:15 am

1 stop19h 20m

Cardiff Wales

Mi 6/3

11:30 pm-3:45 pm

1 stop21h 15m

$991

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 round-trip 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

13h 15m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Cardiff takes 13h 15m
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?

    Cardiff Wales is 3552.6 mi away from Washington, D.C. Dulles Intl. In terms of flight time, this usually takes a little over 13h 15m.

  • 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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, 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 necessary travel and health documents for your Cardiff Wales Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted 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?

    Confirm your travel details to search for the latest offers for flights from Washington, D.C. Dulles Intl Airport to Cardiff. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

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

    By using tools like our “Price Calendar”, you can see the best day to fly round-trip for your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Cardiff from Washington, D.C..

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

Yes. momondo enables you to select and highlight flights to Cardiff from Washington, D.C. with this policy.

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

Once you have performed a search for Washington, D.C. to Cardiff flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Washington, D.C. to Cardiff flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Cardiff trip

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