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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from $696

This is the cheapest round-trip 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 2/27. 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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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
7:40 pm - 7:40 pmIAD-CWL
19h 00m2 stops
Multiple Airlines Logo
10:25 pm - 6:30 pmCWL-IAD
25h 05m2 stops
$696Multiple Airlines
Find Deal
Fri, Feb 27 - Fri, Mar 6
Multiple Airlines Logo
5:05 pm - 3:30 pmIAD-CWL
17h 25m1 stop
Multiple Airlines Logo
2:00 pm - 4:30 pmCWL-IAD
31h 30m2 stops
$761Multiple Airlines
Find Deal
Tue, Feb 10 - Wed, Feb 18
KLM Logo
6:05 pm - 9:50 amIAD-CWL
10h 45m1 stop
KLM Logo
5:25 pm - 4:05 pmCWL-IAD
27h 40m1 stop
$779KLM
Find Deal
Tue, Feb 10 - Wed, Feb 18
KLM Logo
12:35 pm - 9:50 amIAD-CWL
16h 15m2 stops
KLM Logo
5:25 pm - 4:05 pmCWL-IAD
27h 40m1 stop
$783KLM
Find Deal
Thu, Feb 26 - Wed, Mar 4
Delta Logo
6:05 pm - 4:55 pmIAD-CWL
17h 50m1 stop
Delta Logo
10:20 am - 7:11 pmCWL-IAD
13h 51m2 stops
$789Delta
Find Deal
Fri, Feb 27 - Fri, Mar 6
KLM Logo
12:40 pm - 9:50 amIAD-CWL
16h 10m2 stops
KLM Logo
10:20 am - 12:24 amCWL-IAD
19h 04m2 stops
$793KLM
Find Deal
Tue, Feb 10 - Wed, Feb 18
Delta Logo
5:50 pm - 9:15 amIAD-CWL
10h 25m1 stop
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$795Delta
Find Deal
Wed, Apr 1 - Sun, Apr 5
Delta Logo
6:00 am - 9:15 amIAD-CWL
22h 15m2 stops
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$797Delta
Find Deal
Wed, Apr 1 - Sun, Apr 5
Delta Logo
7:00 am - 9:15 amIAD-CWL
21h 15m2 stops
Delta Logo
9:50 am - 3:35 pmCWL-IAD
10h 45m1 stop
$799Delta
Find Deal
Wed, Apr 1 - Sun, Apr 5
Multiple Airlines Logo
9:45 am - 7:40 pmIAD-CWL
28h 55m3 stops
Multiple Airlines Logo
10:25 pm - 3:15 pmCWL-IAD
21h 50m2 stops
$1,161Multiple Airlines
Find Deal
Fri, Feb 27 - Fri, Mar 6

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
Feb 27
IAD6:05 pmWashington, D.C. Dulles Intl
17h 50m
1 stop
CWL4:55 pmCardiff Wales
Mar 6
CWL10:20 amCardiff Wales
13h 51m
2 stops
IAD7:11 pmWashington, D.C. Dulles Intl
$789
Find similar
Delta
Apr 1
IAD5:50 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
CWL9:15 amCardiff Wales
Apr 5
CWL9:50 amCardiff Wales
10h 45m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$795
Find similar
Delta
Apr 1
IAD6:00 amWashington, D.C. Dulles Intl
22h 15m
2 stops
CWL9:15 amCardiff Wales
Apr 5
CWL9:50 amCardiff Wales
10h 45m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$797
Find similar

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
Feb 10
IAD6:05 pmWashington, D.C. Dulles Intl
10h 45m
1 stop
CWL9:50 amCardiff Wales
Feb 18
CWL5:25 pmCardiff Wales
27h 40m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
$779
Find similar
KLM
Feb 26
IAD12:35 pmWashington, D.C. Dulles Intl
16h 15m
2 stops
CWL9:50 amCardiff Wales
Mar 4
CWL5:25 pmCardiff Wales
27h 40m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
$783
Find similar
KLM
Feb 10
IAD12:40 pmWashington, D.C. Dulles Intl
16h 10m
2 stops
CWL9:50 amCardiff Wales
Feb 18
CWL10:20 amCardiff Wales
19h 04m
2 stops
IAD12:24 amWashington, D.C. Dulles Intl
$793
Find similar

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 November 6, 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

Fri 2/27

7:40 pm-7:40 pm

2 stops19h 00m

Cardiff Wales

Fri 3/6

10:25 pm-6:30 pm

2 stops25h 05m

$696

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 2/10

5:05 pm-3:30 pm

1 stop17h 25m

Cardiff Wales

Wed 2/18

2:00 pm-4:30 pm

2 stops31h 30m

$761

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 2/10

6:05 pm-9:50 am

1 stop10h 45m

Cardiff Wales

Wed 2/18

5:25 pm-4:05 pm

1 stop27h 40m

$779

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 2/26

12:35 pm-9:50 am

2 stops16h 15m

Cardiff Wales

Wed 3/4

5:25 pm-4:05 pm

1 stop27h 40m

$783

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 2/27

6:05 pm-4:55 pm

1 stop17h 50m

Cardiff Wales

Fri 3/6

10:20 am-7:11 pm

2 stops13h 51m

$789

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 2/10

12:40 pm-9:50 am

2 stops16h 10m

Cardiff Wales

Wed 2/18

10:20 am-12:24 am

2 stops19h 04m

$793

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 4/1

5:50 pm-9:15 am

1 stop10h 25m

Cardiff Wales

Sun 4/5

9:50 am-3:35 pm

1 stop10h 45m

$795

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 4/1

6:00 am-9:15 am

2 stops22h 15m

Cardiff Wales

Sun 4/5

9:50 am-3:35 pm

1 stop10h 45m

$797

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 4/1

7:00 am-9:15 am

2 stops21h 15m

Cardiff Wales

Sun 4/5

9:50 am-3:35 pm

1 stop10h 45m

$799

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 2/27

9:45 am-7:40 pm

3 stops28h 55m

Cardiff Wales

Fri 3/6

10:25 pm-3:15 pm

2 stops21h 50m

$1,161

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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See travel insights to Cardiff from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Cardiff

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Cardiff?

The cheapest day to depart on your flight to Cardiff is on a Tuesday when prices can be found for as low as $766. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,282. These prices are subject to change though, so be sure to set up a Price Alert for flights to Cardiff.

What is the cheapest time of day to depart on your flight to Cardiff?

Flying to Cardiff from Washington, D.C. Dulles Intl Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $799 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $809 on average. Flights to Cardiff from Washington, D.C. Dulles Intl Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

Direct flights

None
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.
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  • 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 25m.

  • 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 many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Cardiff Wales Airport?

  • 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.

  • What is the most popular airline from Washington, D.C. Dulles Intl Airport to Cardiff?

Best airlines flying from Washington, D.C. Dulles Intl Airport to Cardiff

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Cardiff with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $765Free CancellationRating
7.7
1,405 reviews
Search KLM flights

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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