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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from $228

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 9/1. 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 round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:00 pm - 11:25 pm
IAD
-
CWL
26h 25m
2 stops
Multiple Airlines Logo
11:15 pm - 8:25 pm
CWL
-
IAD
26h 10m
3 stops
$757Multiple Airlines
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
8:30 pm - 11:25 pm
IAD
-
CWL
21h 55m
3 stops
Multiple Airlines Logo
11:15 pm - 8:25 pm
CWL
-
IAD
26h 10m
3 stops
$760Multiple Airlines
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
6:05 pm - 8:10 am
IAD
-
CWL
10h 05m
1 stop
Multiple Airlines Logo
5:30 pm - 7:05 pm
CWL
-
IAD
30h 35m
2 stops
$835Multiple Airlines
Sun, Oct 25 - Thu, Nov 26
Multiple Airlines Logo
10:00 pm - 1:00 pm
IAD
-
CWL
11h 00m
1 stop
Multiple Airlines Logo
5:30 pm - 7:05 pm
CWL
-
IAD
30h 35m
2 stops
$841Multiple Airlines
Wed, Oct 28 - Thu, Nov 26
Multiple Airlines Logo
11:25 am - 10:20 pm
IAD
-
CWL
29h 55m
2 stops
Multiple Airlines Logo
8:15 am - 3:35 pm
CWL
-
IAD
12h 20m
1 stop
$883Multiple Airlines
Thu, Oct 22 - Sat, Nov 21
Multiple Airlines Logo
4:00 pm - 11:25 pm
IAD
-
CWL
26h 25m
2 stops
Multiple Airlines Logo
3:00 pm - 7:25 pm
CWL
-
IAD
33h 25m
2 stops
$887Multiple Airlines
Tue, Sep 15 - Tue, Sep 22
Multiple Airlines Logo
11:25 am - 10:20 pm
IAD
-
CWL
29h 55m
2 stops
Multiple Airlines Logo
8:35 am - 3:35 pm
CWL
-
IAD
12h 00m
1 stop
$895Multiple Airlines
Thu, Oct 22 - Mon, Nov 23
Multiple Airlines Logo
6:15 pm - 2:55 pm
IAD
-
CWL
15h 40m
1 stop
Multiple Airlines Logo
5:30 pm - 7:05 pm
CWL
-
IAD
30h 35m
2 stops
$903Multiple Airlines
Sat, Oct 24 - Thu, Nov 26
Multiple Airlines Logo
6:05 pm - 8:10 am
IAD
-
CWL
10h 05m
1 stop
Multiple Airlines Logo
9:05 am - 4:20 pm
CWL
-
IAD
36h 15m
2 stops
$906Multiple Airlines
Sun, Oct 25 - Sun, Nov 22
Multiple Airlines Logo
10:00 pm - 1:00 pm
IAD
-
CWL
11h 00m
1 stop
Multiple Airlines Logo
9:05 am - 4:20 pm
CWL
-
IAD
36h 15m
2 stops
$911Multiple Airlines
Wed, Oct 28 - Sun, Nov 22

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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
Oct 25
IAD6:45 pmWashington, D.C. Dulles Intl
11h 05m
1 stop
CWL9:50 amCardiff Wales
Nov 24
CWL5:30 pmCardiff Wales
27h 25m
1 stop
IAD3:55 pmWashington, D.C. Dulles Intl
$1,113
KLM
Oct 24
IAD5:40 pmWashington, D.C. Dulles Intl
12h 10m
1 stop
CWL10:50 amCardiff Wales
Nov 24
CWL5:30 pmCardiff Wales
27h 25m
1 stop
IAD3:55 pmWashington, D.C. Dulles Intl
$1,163

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
Oct 27
IAD6:45 pmWashington, D.C. Dulles Intl
18h 15m
1 stop
CWL5:00 pmCardiff Wales
Nov 20
CWL10:20 amCardiff Wales
27h 51m
2 stops
IAD9:11 amWashington, D.C. Dulles Intl
$1,123
Delta
Oct 25
IAD5:13 pmWashington, D.C. Dulles Intl
19h 47m
2 stops
CWL5:00 pmCardiff Wales
Nov 25
CWL10:20 amCardiff Wales
18h 01m
2 stops
IAD11:21 pmWashington, D.C. Dulles Intl
$1,127
Delta
Aug 2
IAD5:40 pmWashington, D.C. Dulles Intl
18h 05m
1 stop
CWL4:45 pmCardiff Wales
Aug 11
CWL9:45 amCardiff Wales
10h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,383

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 July 28, 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

Tue 9/15

4:00 pm-11:25 pm

2 stops26h 25m

Cardiff Wales

Tue 9/22

11:15 pm-8:25 pm

3 stops26h 10m

$757

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 9/15

8:30 pm-11:25 pm

3 stops21h 55m

Cardiff Wales

Tue 9/22

11:15 pm-8:25 pm

3 stops26h 10m

$760
Quickest round-trip

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 10/25

6:05 pm-8:10 am

1 stop10h 05m

Cardiff Wales

Thu 11/26

5:30 pm-7:05 pm

2 stops30h 35m

$835

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 10/28

10:00 pm-1:00 pm

1 stop11h 00m

Cardiff Wales

Thu 11/26

5:30 pm-7:05 pm

2 stops30h 35m

$841

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 10/22

11:25 am-10:20 pm

2 stops29h 55m

Cardiff Wales

Sat 11/21

8:15 am-3:35 pm

1 stop12h 20m

$883

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 9/15

4:00 pm-11:25 pm

2 stops26h 25m

Cardiff Wales

Tue 9/22

3:00 pm-7:25 pm

2 stops33h 25m

$887

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 10/22

11:25 am-10:20 pm

2 stops29h 55m

Cardiff Wales

Mon 11/23

8:35 am-3:35 pm

1 stop12h 00m

$895

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 10/24

6:15 pm-2:55 pm

1 stop15h 40m

Cardiff Wales

Thu 11/26

5:30 pm-7:05 pm

2 stops30h 35m

$903

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 10/25

6:05 pm-8:10 am

1 stop10h 05m

Cardiff Wales

Sun 11/22

9:05 am-4:20 pm

2 stops36h 15m

$906

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 10/28

10:00 pm-1:00 pm

1 stop11h 00m

Cardiff Wales

Sun 11/22

9:05 am-4:20 pm

2 stops36h 15m

$911

Flights are sorted by cheapest round-trip 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 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

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?

    Cardiff Wales is 3552.6 mi away from Washington, D.C. Dulles Intl. In terms of flight time, this usually takes a little over 10h 05m.

  • 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.

Traveling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Bridgend

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.

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Aer Lingus