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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £238

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 15/7. 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 return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
20:30 - 22:50
IAD
-
CWL
21h 20m
3 stops
Multiple Airlines Logo
22:50 - 15:10
CWL
-
IAD
21h 20m
2 stops
£594Multiple Airlines
Mon, 13 Apr - Thu, 16 Apr
Virgin Atlantic Logo
18:10 - 16:45
IAD
-
CWL
17h 35m
1 stop
Virgin Atlantic Logo
09:45 - 15:35
CWL
-
IAD
10h 50m
1 stop
£609Virgin Atlantic
Mon, 13 Apr - Mon, 20 Apr
Delta Logo
18:10 - 09:15
IAD
-
CWL
10h 05m
1 stop
Delta Logo
09:45 - 23:03
CWL
-
IAD
18h 18m
2 stops
£616Delta
Mon, 13 Apr - Mon, 20 Apr
Multiple Airlines Logo
17:15 - 23:25
IAD
-
CWL
25h 10m
1 stop
Multiple Airlines Logo
21:45 - 19:00
CWL
-
IAD
26h 15m
2 stops
£651Multiple Airlines
Tue, 14 Apr - Tue, 21 Apr
Multiple Airlines Logo
17:15 - 22:00
IAD
-
CWL
23h 45m
1 stop
Multiple Airlines Logo
17:40 - 19:25
CWL
-
IAD
30h 45m
2 stops
£661Multiple Airlines
Sun, 12 Apr - Sun, 19 Apr
Multiple Airlines Logo
15:00 - 09:15
IAD
-
CWL
37h 15m
2 stops
Multiple Airlines Logo
17:15 - 23:03
CWL
-
IAD
34h 48m
2 stops
£667Multiple Airlines
Mon, 13 Apr - Mon, 20 Apr
Delta Logo
18:50 - 16:45
IAD
-
CWL
16h 55m
2 stops
Delta Logo
09:45 - 23:03
CWL
-
IAD
18h 18m
2 stops
£700Delta
Tue, 14 Apr - Tue, 21 Apr
Virgin Atlantic Logo
17:40 - 09:15
IAD
-
CWL
10h 35m
1 stop
Virgin Atlantic Logo
09:45 - 15:35
CWL
-
IAD
10h 50m
1 stop
£726Virgin Atlantic
Fri, 10 Apr - Fri, 17 Apr
KLM Logo
17:40 - 09:15
IAD
-
CWL
10h 35m
1 stop
KLM Logo
17:15 - 15:35
CWL
-
IAD
27h 20m
1 stop
£726KLM
Sun, 12 Apr - Sun, 19 Apr
Multiple Airlines Logo
17:15 - 21:20
IAD
-
CWL
23h 05m
1 stop
Multiple Airlines Logo
11:35 - 22:59
CWL
-
IAD
16h 24m
2 stops
£739Multiple Airlines
Sat, 13 Jun - Tue, 23 Jun

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
12 Apr
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
19 Apr
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£726
KLM
8 Jul
IAD18:10Washington, D.C. Dulles Intl
17h 35m
1 stop
CWL16:45Cardiff Wales
20 Jul
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£788
KLM
11 Apr
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
18 Apr
CWL17:35Cardiff Wales
27h 00m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£790

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
13 Apr
IAD18:10Washington, D.C. Dulles Intl
17h 35m
1 stop
CWL16:45Cardiff Wales
20 Apr
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£608
Virgin Atlantic
10 Apr
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
17 Apr
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£726
Virgin Atlantic
10 Apr
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
17 Apr
CWL09:45Cardiff Wales
18h 47m
2 stops
IAD23:32Washington, D.C. Dulles Intl
£800

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 1 March 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

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/4

20:30-22:50

3 stops21h 20m

Cardiff Wales

Thu 16/4

22:50-15:10

2 stops21h 20m

£594

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/4

18:10-16:45

1 stop17h 35m

Cardiff Wales

Mon 20/4

09:45-15:35

1 stop10h 50m

£608

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/4

18:10-09:15

1 stop10h 05m

Cardiff Wales

Mon 20/4

09:45-23:03

2 stops18h 18m

£616

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 14/4

17:15-23:25

1 stop25h 10m

Cardiff Wales

Tue 21/4

21:45-19:00

2 stops26h 15m

£651

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 12/4

17:15-22:00

1 stop23h 45m

Cardiff Wales

Sun 19/4

17:40-19:25

2 stops30h 45m

£661

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 13/4

15:00-09:15

2 stops37h 15m

Cardiff Wales

Mon 20/4

17:15-23:03

2 stops34h 48m

£667

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Tue 14/4

18:50-16:45

2 stops16h 55m

Cardiff Wales

Tue 21/4

09:45-23:03

2 stops18h 18m

£700

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 10/4

17:40-09:15

1 stop10h 35m

Cardiff Wales

Fri 17/4

09:45-15:35

1 stop10h 50m

£726

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 12/4

17:40-09:15

1 stop10h 35m

Cardiff Wales

Sun 19/4

17:15-15:35

1 stop27h 20m

£726

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 13/6

17:15-21:20

1 stop23h 05m

Cardiff Wales

Tue 23/6

11:35-22:59

2 stops16h 24m

£739

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 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 airline that flies from Washington, D.C. Dulles Intl to Cardiff Wales?

Delta is the most popular carrier operating from Washington, D.C. Dulles Intl to Cardiff Wales

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

16h 31m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Cardiff takes 16h 31m
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

  • 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 16h 31m, 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.

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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