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Cheap flights from Washington, D.C. to Cardiff from $409

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. to Cardiff departing on 6/22. 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. to Cardiff

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
9:05 pm - 11:05 pm
IAD
-
CWL
21h 00m
1 stop
Multiple Airlines Logo
9:45 pm - 7:00 pm
CWL
-
IAD
26h 15m
2 stops
$976Multiple Airlines
Di, Mai 12 - Di, Mai 19
Multiple Airlines Logo
4:00 pm - 10:15 am
IAD
-
CWL
13h 15m
1 stop
Multiple Airlines Logo
9:35 am - 3:10 pm
CWL
-
IAD
34h 35m
2 stops
$1,057Multiple Airlines
So, Jun 21 - So, Jun 28
Virgin Atlantic Logo
5:40 pm - 4:45 pm
IAD
-
CWL
18h 05m
1 stop
Virgin Atlantic Logo
9:45 am - 3:35 pm
CWL
-
IAD
10h 50m
1 stop
$1,097Virgin Atlantic
Di, Mai 12 - Di, Mai 19
Virgin Atlantic Logo
11:50 am - 9:15 am
BWI
-
CWL
16h 25m
2 stops
Virgin Atlantic Logo
9:45 am - 8:47 pm
CWL
-
BWI
16h 02m
2 stops
$1,111Virgin Atlantic
Di, Mai 12 - Di, Mai 19
KLM Logo
12:59 pm - 9:15 am
DCA
-
CWL
15h 16m
2 stops
KLM Logo
9:45 am - 10:03 pm
CWL
-
DCA
17h 18m
2 stops
$1,129KLM
Di, Mai 12 - Di, Mai 19
Delta Logo
11:05 am - 9:15 am
BWI
-
CWL
17h 10m
2 stops
Delta Logo
9:45 am - 8:47 pm
CWL
-
BWI
16h 02m
2 stops
$1,142Delta
Di, Mai 12 - Di, Mai 19
KLM Logo
3:00 pm - 9:15 am
DCA
-
CWL
13h 15m
2 stops
KLM Logo
9:45 am - 10:00 pm
CWL
-
DCA
17h 15m
2 stops
$1,181KLM
Mi, Mai 13 - Mi, Mai 20
Delta Logo
7:59 pm - 4:45 pm
DCA
-
CWL
15h 46m
2 stops
Delta Logo
9:45 am - 11:24 pm
CWL
-
DCA
18h 39m
2 stops
$1,237Delta
Do, Mai 14 - Do, Mai 21
Aer Lingus Logo
9:35 pm - 11:30 am
BWI
-
CWL
32h 55m
2 stops
Aer Lingus Logo
12:00 pm - 7:40 pm
CWL
-
BWI
36h 40m
2 stops
$2,025Aer Lingus
So, Jun 21 - So, Jun 28
Aer Lingus Logo
9:30 pm - 11:30 am
BWI
-
CWL
33h 00m
2 stops
Aer Lingus Logo
12:00 pm - 7:40 pm
CWL
-
BWI
36h 40m
2 stops
$8,237Aer Lingus
Sa, Jun 6 - Do, Jun 11

Virgin Atlantic flights from Washington, D.C. to Cardiff

Our best Virgin Atlantic deals on Washington, D.C. to Cardiff flight tickets
Virgin Atlantic
May 12
IAD5:40 pmWashington, D.C. Dulles Intl
18h 05m
1 stop
CWL4:45 pmCardiff Wales
May 19
CWL9:45 amCardiff Wales
10h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,097
Virgin Atlantic
May 12
BWI11:50 amBaltimore/Washington
16h 25m
2 stops
CWL9:15 amCardiff Wales
May 19
CWL9:45 amCardiff Wales
16h 02m
2 stops
BWI8:47 pmBaltimore/Washington
$1,111
Virgin Atlantic
May 13
IAD6:10 pmWashington, D.C. Dulles Intl
17h 35m
1 stop
CWL4:45 pmCardiff Wales
May 20
CWL9:45 amCardiff Wales
10h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,113

Delta flights from Washington, D.C. to Cardiff

Our best Delta deals on Washington, D.C. to Cardiff flight tickets
Delta
May 12
IAD5:40 pmWashington, D.C. Dulles Intl
18h 05m
1 stop
CWL4:45 pmCardiff Wales
May 19
CWL9:45 amCardiff Wales
10h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,128
Delta
May 12
BWI11:05 amBaltimore/Washington
17h 10m
2 stops
CWL9:15 amCardiff Wales
May 19
CWL9:45 amCardiff Wales
16h 02m
2 stops
BWI8:47 pmBaltimore/Washington
$1,142
Delta
May 14
DCA7:59 pmWashington, D.C. Reagan-National
15h 46m
2 stops
CWL4:45 pmCardiff Wales
May 21
CWL9:45 amCardiff Wales
18h 39m
2 stops
DCA11:24 pmWashington, D.C. Reagan-National
$1,237

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 April 1, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Cardiff that are best for you.

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Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Di 5/12

9:05 pm-11:05 pm

1 stop21h 00m

Cardiff Wales

Di 5/19

9:45 pm-7:00 pm

2 stops26h 15m

$976

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

So 6/21

4:00 pm-10:15 am

1 stop13h 15m

Cardiff Wales

So 6/28

9:35 am-3:10 pm

2 stops34h 35m

$1,057
Quickest round-trip

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Di 5/12

5:40 pm-4:45 pm

1 stop18h 05m

Cardiff Wales

Di 5/19

9:45 am-3:35 pm

1 stop10h 50m

$1,097

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Di 5/12

11:50 am-9:15 am

2 stops16h 25m

Cardiff Wales

Di 5/19

9:45 am-8:47 pm

2 stops16h 02m

$1,111

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Di 5/12

12:59 pm-9:15 am

2 stops15h 16m

Cardiff Wales

Di 5/19

9:45 am-10:03 pm

2 stops17h 18m

$1,129

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Di 5/12

11:05 am-9:15 am

2 stops17h 10m

Cardiff Wales

Di 5/19

9:45 am-8:47 pm

2 stops16h 02m

$1,142

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Mi 5/13

3:00 pm-9:15 am

2 stops13h 15m

Cardiff Wales

Mi 5/20

9:45 am-10:00 pm

2 stops17h 15m

$1,181

Washington, D.C.Cardiff

DCA - CWL

DCACWL

Washington, D.C. Reagan-National

Do 5/14

7:59 pm-4:45 pm

2 stops15h 46m

Cardiff Wales

Do 5/21

9:45 am-11:24 pm

2 stops18h 39m

$1,237

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

So 6/21

9:35 pm-11:30 am

2 stops32h 55m

Cardiff Wales

So 6/28

12:00 pm-7:40 pm

2 stops36h 40m

$2,025

BaltimoreCardiff

BWI - CWL

BWICWL

Baltimore/Washington

Sa 6/6

9:30 pm-11:30 am

2 stops33h 00m

Cardiff Wales

Do 6/11

12:00 pm-7:40 pm

2 stops36h 40m

$8,237

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. 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

Can stopping save me money on Washington, D.C. to Cardiff flights?

You could potentially save up to 7% on your flight if you consider stops on a Washington, D.C. to Cardiff flight.

When to book flights from Washington, D.C. to Cardiff

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Cardiff (WAS to CWL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Cardiff

Fastest flight time

13h 15m

Direct flights

None
The fastest flight from Washington, D.C. to Cardiff takes 13h 15m
There are no direct flights from Washington, D.C. to Cardiff. There are no popular flight routes from Washington, D.C. to Cardiff.
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Frequently asked questions about flying from Washington, D.C. to Cardiff

  • How far is Washington, D.C. to Cardiff Wales by plane?

    Cardiff Wales is 3537.5 mi away from Washington, D.C.. 13h 15m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Washington, D.C. to Cardiff Wales Airport?

    Prices for flights from Washington, D.C. to Cardiff Wales Airport refresh daily.

  • How old do you have to be to fly from Washington, D.C. 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. 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.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Cardiff?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Cardiff for you.

Can I find flights from Washington, D.C. to Cardiff with flexible booking policies on momondo?

Yes. All flights to Cardiff from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to Cardiff?

momondo provides multiple filters to help you find the best flight to Cardiff from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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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Aer Lingus