Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £314

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 1/3. 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.
KLM Logo
18:05 - 09:50
IAD
-
CWL
10h 45m
1 stop
KLM Logo
17:25 - 17:05
CWL
-
IAD
27h 40m
1 stop
£581KLM
Thu, 5 Mar - Thu, 12 Mar
KLM Logo
12:24 - 09:50
IAD
-
CWL
16h 26m
2 stops
KLM Logo
17:25 - 17:05
CWL
-
IAD
27h 40m
1 stop
£584KLM
Thu, 5 Mar - Thu, 12 Mar
Delta Logo
12:24 - 09:50
IAD
-
CWL
16h 26m
2 stops
Delta Logo
10:20 - 22:59
CWL
-
IAD
16h 39m
2 stops
£591Delta
Thu, 5 Mar - Thu, 12 Mar
Multiple Airlines Logo
08:18 - 10:15
IAD
-
CWL
20h 57m
2 stops
Multiple Airlines Logo
11:35 - 07:44
CWL
-
IAD
25h 09m
2 stops
£654Multiple Airlines
Mon, 1 Jun - Mon, 8 Jun
Multiple Airlines Logo
19:05 - 09:50
IAD
-
CWL
10h 45m
1 stop
Multiple Airlines Logo
17:25 - 15:35
CWL
-
IAD
26h 10m
1 stop
£660Multiple Airlines
Sat, 21 Mar - Sat, 28 Mar
Virgin Atlantic Logo
19:05 - 09:50
IAD
-
CWL
10h 45m
1 stop
Virgin Atlantic Logo
17:25 - 15:35
CWL
-
IAD
26h 10m
1 stop
£668Virgin Atlantic
Sat, 21 Mar - Sat, 28 Mar
Multiple Airlines Logo
18:05 - 23:05
IAD
-
CWL
25h 00m
1 stop
Multiple Airlines Logo
17:40 - 19:10
CWL
-
IAD
30h 30m
2 stops
£675Multiple Airlines
Sun, 22 Mar - Sun, 29 Mar
Multiple Airlines Logo
08:18 - 10:15
IAD
-
CWL
20h 57m
2 stops
Multiple Airlines Logo
22:25 - 20:32
CWL
-
IAD
27h 07m
3 stops
£688Multiple Airlines
Mon, 1 Jun - Mon, 8 Jun
Multiple Airlines Logo
08:18 - 10:15
IAD
-
CWL
20h 57m
2 stops
Multiple Airlines Logo
11:35 - 20:29
CWL
-
IAD
13h 54m
1 stop
£690Multiple Airlines
Mon, 1 Jun - Mon, 8 Jun
Multiple Airlines Logo
16:10 - 10:15
IAD
-
CWL
13h 05m
1 stop
Multiple Airlines Logo
11:35 - 20:29
CWL
-
IAD
13h 54m
1 stop
£757Multiple Airlines
Mon, 1 Jun - Mon, 8 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
5 Mar
IAD18:05Washington, D.C. Dulles Intl
10h 45m
1 stop
CWL09:50Cardiff Wales
12 Mar
CWL17:25Cardiff Wales
27h 40m
1 stop
IAD17:05Washington, D.C. Dulles Intl
£581
KLM
5 Mar
IAD12:24Washington, D.C. Dulles Intl
16h 26m
2 stops
CWL09:50Cardiff Wales
12 Mar
CWL17:25Cardiff Wales
27h 40m
1 stop
IAD17:05Washington, D.C. Dulles Intl
£584
KLM
9 Feb
IAD18:05Washington, D.C. Dulles Intl
17h 50m
1 stop
CWL16:55Cardiff Wales
9 Jul
CWL17:15Cardiff Wales
27h 20m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£780

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
5 Mar
IAD12:24Washington, D.C. Dulles Intl
16h 26m
2 stops
CWL09:50Cardiff Wales
12 Mar
CWL10:20Cardiff Wales
16h 39m
2 stops
IAD22:59Washington, D.C. Dulles Intl
£591
Delta
21 Jun
IAD17:40Washington, D.C. Dulles Intl
10h 35m
1 stop
CWL09:15Cardiff Wales
1 Jul
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£887
Delta
23 Jun
IAD16:00Washington, D.C. Dulles Intl
19h 45m
2 stops
CWL16:45Cardiff Wales
26 Jun
CWL09:45Cardiff Wales
10h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
£891

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 6 February 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

Thu 5/3

18:05-09:50

1 stop10h 45m

Cardiff Wales

Thu 12/3

17:25-17:05

1 stop27h 40m

£581

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 5/3

12:24-09:50

2 stops16h 26m

Cardiff Wales

Thu 12/3

17:25-17:05

1 stop27h 40m

£584

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 5/3

12:24-09:50

2 stops16h 26m

Cardiff Wales

Thu 12/3

10:20-22:59

2 stops16h 39m

£591

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 1/6

08:18-10:15

2 stops20h 57m

Cardiff Wales

Mon 8/6

11:35-07:44

2 stops25h 09m

£654

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 21/3

19:05-09:50

1 stop10h 45m

Cardiff Wales

Sat 28/3

17:25-15:35

1 stop26h 10m

£660

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 21/3

19:05-09:50

1 stop10h 45m

Cardiff Wales

Sat 28/3

17:25-15:35

1 stop26h 10m

£668

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sun 22/3

18:05-23:05

1 stop25h 00m

Cardiff Wales

Sun 29/3

17:40-19:10

2 stops30h 30m

£675

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 1/6

08:18-10:15

2 stops20h 57m

Cardiff Wales

Mon 8/6

22:25-20:32

3 stops27h 07m

£688

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 1/6

08:18-10:15

2 stops20h 57m

Cardiff Wales

Mon 8/6

11:35-20:29

1 stop13h 54m

£690

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 1/6

16:10-10:15

1 stop13h 05m

Cardiff Wales

Mon 8/6

11:35-20:29

1 stop13h 54m

£757

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 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?

KLM 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

10h 45m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Cardiff takes 10h 45m
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 10h 45m, 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.

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
Sun 8/3
Sun 15/3
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