Latest deals
When to book
FAQs
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £541

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 11/8. 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
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
20:55 - 21:45
IAD
-
CWL
19h 50m
1 stop
Multiple Airlines Logo
07:30 - 10:46
CWL
-
IAD
32h 16m
2 stops
£664Multiple Airlines
Sun, 13 Sep - Sat, 26 Sep
Multiple Airlines Logo
17:47 - 10:15
IAD
-
CWL
35h 28m
2 stops
Multiple Airlines Logo
11:35 - 10:46
CWL
-
IAD
28h 11m
1 stop
£673Multiple Airlines
Tue, 16 Jun - Tue, 23 Jun
Multiple Airlines Logo
20:55 - 21:45
IAD
-
CWL
19h 50m
1 stop
Multiple Airlines Logo
07:30 - 10:46
CWL
-
IAD
32h 16m
2 stops
£689Multiple Airlines
Sun, 13 Sep - Sat, 26 Sep
Multiple Airlines Logo
20:55 - 21:45
IAD
-
CWL
19h 50m
1 stop
Multiple Airlines Logo
16:15 - 15:30
CWL
-
IAD
28h 15m
2 stops
£692Multiple Airlines
Sun, 13 Sep - Tue, 22 Sep
Multiple Airlines Logo
16:00 - 10:15
IAD
-
CWL
13h 15m
1 stop
Multiple Airlines Logo
12:30 - 15:30
CWL
-
IAD
32h 00m
2 stops
£694Multiple Airlines
Fri, 11 Sep - Sat, 26 Sep
Multiple Airlines Logo
16:20 - 10:15
IAD
-
CWL
12h 55m
1 stop
Multiple Airlines Logo
23:15 - 20:24
CWL
-
IAD
26h 09m
3 stops
£701Multiple Airlines
Mon, 27 Jul - Tue, 4 Aug
Multiple Airlines Logo
17:15 - 21:45
IAD
-
CWL
23h 30m
1 stop
Multiple Airlines Logo
17:40 - 15:30
CWL
-
IAD
26h 50m
2 stops
£708Multiple Airlines
Sun, 13 Sep - Sun, 27 Sep
Multiple Airlines Logo
17:34 - 10:15
IAD
-
CWL
35h 41m
2 stops
Multiple Airlines Logo
11:35 - 15:01
CWL
-
IAD
32h 26m
2 stops
£718Multiple Airlines
Tue, 16 Jun - Tue, 23 Jun
Multiple Airlines Logo
16:00 - 10:15
IAD
-
CWL
13h 15m
1 stop
Multiple Airlines Logo
16:20 - 15:30
CWL
-
IAD
28h 10m
2 stops
£719Multiple Airlines
Fri, 11 Sep - Thu, 24 Sep
Multiple Airlines Logo
20:55 - 21:45
IAD
-
CWL
19h 50m
1 stop
Multiple Airlines Logo
23:30 - 15:10
CWL
-
IAD
20h 40m
2 stops
£720Multiple Airlines
Sun, 23 Aug - Wed, 26 Aug

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 13 May 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

Sun 13/9

20:55-21:45

1 stop19h 50m

Cardiff Wales

Sat 26/9

07:30-10:46

2 stops32h 16m

£664

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 16/6

17:47-10:15

2 stops35h 28m

Cardiff Wales

Tue 23/6

11:35-10:46

1 stop28h 11m

£673

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 13/9

20:55-21:45

1 stop19h 50m

Cardiff Wales

Sat 26/9

07:30-10:46

2 stops32h 16m

£689

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 13/9

20:55-21:45

1 stop19h 50m

Cardiff Wales

Tue 22/9

16:15-15:30

2 stops28h 15m

£692

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 11/9

16:00-10:15

1 stop13h 15m

Cardiff Wales

Sat 26/9

12:30-15:30

2 stops32h 00m

£694
Fastest return journey

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 27/7

16:20-10:15

1 stop12h 55m

Cardiff Wales

Tue 4/8

23:15-20:24

3 stops26h 09m

£701

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 13/9

17:15-21:45

1 stop23h 30m

Cardiff Wales

Sun 27/9

17:40-15:30

2 stops26h 50m

£708

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 16/6

17:34-10:15

2 stops35h 41m

Cardiff Wales

Tue 23/6

11:35-15:01

2 stops32h 26m

£718

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 11/9

16:00-10:15

1 stop13h 15m

Cardiff Wales

Thu 24/9

16:20-15:30

2 stops28h 10m

£719

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 23/8

20:55-21:45

1 stop19h 50m

Cardiff Wales

Wed 26/8

23:30-15:10

2 stops20h 40m

£720

Flights are sorted by cheapest return flights first.

Showing 1-10 of 11 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.

An easier way to manage your Cardiff trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 12/6
Fri 19/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Airports servicing Wales

Holyhead Anglesey Airport