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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £444

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 18/12. 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 return flights

Logo
17:20 - 10:35IAD-CWL
12h 15m1 stop
Logo
09:00 - 15:50CWL-IAD
11h 50m1 stop
£488
Find Deal
lø., 13 sep. - lø., 20 sep.
KLM Logo
17:25 - 09:15IAD-CWL
10h 50m1 stop
KLM Logo
17:15 - 15:35CWL-IAD
27h 20m1 stop
£623KLM
Find Deal
ma., 13 okt. - on., 22 okt.
Logo
17:20 - 07:30IAD-CWL
9h 10m1 stop
Logo
12:25 - 18:55CWL-IAD
11h 30m1 stop
£623
Find Deal
fr., 29 aug. - fr., 5 sep.
KLM Logo
12:27 - 09:15IAD-CWL
15h 48m2 stops
KLM Logo
17:15 - 15:35CWL-IAD
27h 20m1 stop
£626KLM
Find Deal
ma., 13 okt. - on., 22 okt.
Delta Logo
12:08 - 09:15IAD-CWL
16h 07m2 stops
Delta Logo
09:45 - 15:35CWL-IAD
10h 50m1 stop
£627Delta
Find Deal
lø., 13 sep. - lø., 20 sep.
Virgin Atlantic Logo
12:00 - 09:50IAD-CWL
16h 50m2 stops
Virgin Atlantic Logo
17:30 - 16:05CWL-IAD
27h 35m1 stop
£628Virgin Atlantic
Find Deal
on., 12 nov. - sø., 16 nov.
KLM Logo
13:00 - 09:15IAD-CWL
15h 15m2 stops
KLM Logo
09:50 - 23:30CWL-IAD
18h 40m2 stops
£634KLM
Find Deal
ma., 13 okt. - on., 22 okt.
Delta Logo
12:08 - 09:15IAD-CWL
16h 07m2 stops
Delta Logo
09:45 - 19:37CWL-IAD
14h 52m2 stops
£635Delta
Find Deal
lø., 13 sep. - lø., 20 sep.
Virgin Atlantic Logo
12:00 - 09:50IAD-CWL
16h 50m2 stops
Virgin Atlantic Logo
17:30 - 16:31CWL-IAD
28h 01m2 stops
£635Virgin Atlantic
Find Deal
on., 12 nov. - sø., 16 nov.
KLM Logo
18:05 - 09:50IAD-CWL
10h 45m1 stop
KLM Logo
17:30 - 16:05CWL-IAD
27h 35m1 stop
£663KLM
Find Deal
on., 12 nov. - sø., 16 nov.

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
13 Sept
IAD12:08Washington, D.C. Dulles Intl
16h 07m
2 stops
CWL09:15Cardiff Wales
20 Sept
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£627
Find similar
Delta
13 Sept
IAD12:08Washington, D.C. Dulles Intl
16h 07m
2 stops
CWL09:15Cardiff Wales
20 Sept
CWL09:45Cardiff Wales
14h 52m
2 stops
IAD19:37Washington, D.C. Dulles Intl
£635
Find similar
Delta
18 Sept
IAD12:08Washington, D.C. Dulles Intl
16h 07m
2 stops
CWL09:15Cardiff Wales
30 Sept
CWL09:50Cardiff Wales
14h 47m
2 stops
IAD19:37Washington, D.C. Dulles Intl
£771
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
13 Oct
IAD17:25Washington, D.C. Dulles Intl
10h 50m
1 stop
CWL09:15Cardiff Wales
22 Oct
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£623
Find similar
KLM
13 Oct
IAD12:27Washington, D.C. Dulles Intl
15h 48m
2 stops
CWL09:15Cardiff Wales
22 Oct
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£626
Find similar
KLM
13 Oct
IAD13:00Washington, D.C. Dulles Intl
15h 15m
2 stops
CWL09:15Cardiff Wales
22 Oct
CWL09:50Cardiff Wales
18h 40m
2 stops
IAD23:30Washington, D.C. Dulles Intl
£634
Find similar

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 august 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

lø. 13/9

17:20-10:35

1 stop12h 15m

Cardiff Wales

lø. 20/9

09:00-15:50

1 stop11h 50m

£488

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

ma. 13/10

17:25-09:15

1 stop10h 50m

Cardiff Wales

on. 22/10

17:15-15:35

1 stop27h 20m

£623

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

fr. 29/8

17:20-07:30

1 stop9h 10m

Cardiff Wales

fr. 5/9

12:25-18:55

1 stop11h 30m

£623

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

ma. 13/10

12:27-09:15

2 stops15h 48m

Cardiff Wales

on. 22/10

17:15-15:35

1 stop27h 20m

£626

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

lø. 13/9

12:08-09:15

2 stops16h 07m

Cardiff Wales

lø. 20/9

09:45-15:35

1 stop10h 50m

£627

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

on. 12/11

12:00-09:50

2 stops16h 50m

Cardiff Wales

sø. 16/11

17:30-16:05

1 stop27h 35m

£628

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

ma. 13/10

13:00-09:15

2 stops15h 15m

Cardiff Wales

on. 22/10

09:50-23:30

2 stops18h 40m

£634

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

lø. 13/9

12:08-09:15

2 stops16h 07m

Cardiff Wales

lø. 20/9

09:45-19:37

2 stops14h 52m

£635

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

on. 12/11

12:00-09:50

2 stops16h 50m

Cardiff Wales

sø. 16/11

17:30-16:31

2 stops28h 01m

£635

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

on. 12/11

18:05-09:50

1 stop10h 45m

Cardiff Wales

sø. 16/11

17:30-16:05

1 stop27h 35m

£663

Flights are sorted by cheapest return flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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

Best price found

£444

Fastest flight time

9h 10m

Direct flights

None

Airports in Cardiff

1 airport
The best one-way flight to Cardiff from Washington, D.C. Dulles Intl Airport in the past 72 hours is £444. The best return flight deal from Washington, D.C. Dulles Intl Airport to Cardiff found on momondo in the last 72 hours is £488.
The fastest flight from Washington, D.C. Dulles Intl Airport to Cardiff takes 9h 10m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Cardiff. Popular non-direct route for this connection is Washington, D.C. Dulles Intl Airport - Cardiff Wales Airport.
There is 1 airport near Cardiff: Cardiff Wales (CWL)
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 9h 10m, 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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Airports servicing Wales

Holyhead Anglesey Airport