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Cheap flights from Cardiff to Washington, D.C. from $800

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Cardiff to Washington, D.C. departing on 9/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Cardiff to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:30 am - 3:45 pm
CWL
-
IAD
13h 15m
1 stop
Multiple Airlines Logo
8:40 pm - 9:20 pm
IAD
-
CWL
19h 40m
1 stop
$800Multiple Airlines
Sat, Sep 12 - Sat, Sep 19
Virgin Atlantic Logo
9:50 am - 10:12 am
CWL
-
IAD
53h 22m
2 stops
Virgin Atlantic Logo
6:32 pm - 4:45 pm
IAD
-
CWL
41h 13m
2 stops
$865Virgin Atlantic
Sun, Oct 4 - Sun, Oct 11
Virgin Atlantic Logo
5:15 pm - 3:35 pm
CWL
-
IAD
27h 20m
1 stop
Virgin Atlantic Logo
5:40 pm - 4:45 pm
IAD
-
CWL
18h 05m
1 stop
$883Virgin Atlantic
Tue, Sep 8 - Tue, Sep 15
KLM Logo
5:15 pm - 3:35 pm
CWL
-
IAD
27h 20m
1 stop
KLM Logo
12:25 pm - 9:15 am
IAD
-
CWL
15h 50m
2 stops
$889KLM
Tue, Sep 8 - Tue, Sep 15
KLM Logo
9:50 am - 3:35 pm
CWL
-
IAD
10h 45m
1 stop
KLM Logo
6:32 pm - 9:15 am
IAD
-
CWL
33h 43m
2 stops
$891KLM
Sun, Oct 4 - Sun, Oct 11
Multiple Airlines Logo
9:45 am - 11:14 pm
CWL
-
IAD
18h 29m
2 stops
Multiple Airlines Logo
11:10 am - 9:15 am
IAD
-
CWL
17h 05m
2 stops
$894Multiple Airlines
Tue, Sep 8 - Tue, Sep 15
Virgin Atlantic Logo
9:45 am - 3:35 pm
CWL
-
IAD
10h 50m
1 stop
Virgin Atlantic Logo
6:26 pm - 4:45 pm
IAD
-
CWL
17h 19m
2 stops
$902Virgin Atlantic
Sat, Sep 12 - Sat, Sep 19
Air France Logo
9:50 am - 3:35 pm
CWL
-
IAD
10h 45m
1 stop
Air France Logo
5:40 pm - 4:45 pm
IAD
-
CWL
18h 05m
1 stop
$914Air France
Sun, Oct 4 - Sun, Oct 11
Multiple Airlines Logo
11:35 am - 7:43 am
CWL
-
IAD
25h 08m
2 stops
Multiple Airlines Logo
9:55 am - 9:20 pm
IAD
-
CWL
30h 25m
2 stops
$932Multiple Airlines
Sat, Sep 12 - Sat, Sep 19
Multiple Airlines Logo
11:35 am - 7:43 am
CWL
-
IAD
25h 08m
2 stops
Multiple Airlines Logo
9:45 am - 9:20 pm
IAD
-
CWL
30h 35m
3 stops
$937Multiple Airlines
Sat, Sep 12 - Sat, Sep 19

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Virgin Atlantic flights from Cardiff to Washington, D.C. Dulles Intl Airport

Our best Virgin Atlantic deals on Cardiff to Washington, D.C. Dulles Intl Airport flight tickets
Virgin Atlantic
Oct 4
CWL9:50 amCardiff Wales
53h 22m
2 stops
IAD10:12 amWashington, D.C. Dulles Intl
Oct 11
IAD6:32 pmWashington, D.C. Dulles Intl
41h 13m
2 stops
CWL4:45 pmCardiff Wales
$865
Virgin Atlantic
Sep 8
CWL5:15 pmCardiff Wales
27h 20m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Sep 15
IAD5:40 pmWashington, D.C. Dulles Intl
18h 05m
1 stop
CWL4:45 pmCardiff Wales
$883
Virgin Atlantic
Sep 12
CWL9:45 amCardiff Wales
10h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Sep 19
IAD6:26 pmWashington, D.C. Dulles Intl
17h 19m
2 stops
CWL4:45 pmCardiff Wales
$902

KLM flights from Cardiff to Washington, D.C. Dulles Intl Airport

Our best KLM deals on Cardiff to Washington, D.C. Dulles Intl Airport flight tickets
KLM
Sep 8
CWL5:15 pmCardiff Wales
27h 20m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Sep 15
IAD12:25 pmWashington, D.C. Dulles Intl
15h 50m
2 stops
CWL9:15 amCardiff Wales
$889
KLM
Oct 4
CWL9:50 amCardiff Wales
10h 45m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Oct 11
IAD6:32 pmWashington, D.C. Dulles Intl
33h 43m
2 stops
CWL9:15 amCardiff Wales
$891

momondo Fare Finder

 
Customize your flight search to find flights from Cardiff to Washington, D.C. Dulles Intl Airport 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 August 2, 2026.
Use the filters below to find and compare flights from Cardiff to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 9/12

7:30 am-3:45 pm

1 stop13h 15m

Washington, D.C. Dulles Intl

Sat 9/19

8:40 pm-9:20 pm

1 stop19h 40m

$800

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 10/4

9:50 am-10:12 am

2 stops53h 22m

Washington, D.C. Dulles Intl

Sun 10/11

6:32 pm-4:45 pm

2 stops41h 13m

$865

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 9/8

5:15 pm-3:35 pm

1 stop27h 20m

Washington, D.C. Dulles Intl

Tue 9/15

5:40 pm-4:45 pm

1 stop18h 05m

$883

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 9/8

5:15 pm-3:35 pm

1 stop27h 20m

Washington, D.C. Dulles Intl

Tue 9/15

12:25 pm-9:15 am

2 stops15h 50m

$889

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 10/4

9:50 am-3:35 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

Sun 10/11

6:32 pm-9:15 am

2 stops33h 43m

$891

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Tue 9/8

9:45 am-11:14 pm

2 stops18h 29m

Washington, D.C. Dulles Intl

Tue 9/15

11:10 am-9:15 am

2 stops17h 05m

$894
Quickest round-trip

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 9/12

9:45 am-3:35 pm

1 stop10h 50m

Washington, D.C. Dulles Intl

Sat 9/19

6:26 pm-4:45 pm

2 stops17h 19m

$902

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 10/4

9:50 am-3:35 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

Sun 10/11

5:40 pm-4:45 pm

1 stop18h 05m

$914

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 9/12

11:35 am-7:43 am

2 stops25h 08m

Washington, D.C. Dulles Intl

Sat 9/19

9:55 am-9:20 pm

2 stops30h 25m

$932

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 9/12

11:35 am-7:43 am

2 stops25h 08m

Washington, D.C. Dulles Intl

Sat 9/19

9:45 am-9:20 pm

3 stops30h 35m

$937

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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

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 Cardiff to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 53% on your flight if you consider stops on a Cardiff to Washington, D.C. Dulles Intl Airport flight.

When to book flights from Cardiff to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Cardiff to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Cardiff to Washington, D.C. Dulles Intl Airport (CWL to IAD) flight deals and tips

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

Fastest flight time

13h 49m

Direct flights

None
The fastest flight from Cardiff to Washington, D.C. Dulles Intl Airport takes 13h 49m
There are no direct flights from Cardiff to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from Cardiff to Washington, D.C. Dulles Intl Airport.
Search flight deals

Frequently asked questions about flying from Cardiff to Washington, D.C. Dulles Intl Airport

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

    Cardiff Wales and Washington, D.C. Dulles Intl are 3552.6 mi apart from one another. Typically, this will take 13h 49m by plane in normal conditions.

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

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

  • How old do you have to be to fly from Cardiff Wales Airport to Washington, D.C. Dulles Intl 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 Cardiff Wales Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The necessary travel and health documents for your Washington, D.C. Dulles Intl 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.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Silver Spring
Towson
Colonial Beach
Sterling
Springfield
Fairfax
Tysons
Bethesda

Why use momondo?

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

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 Washington, D.C. from Cardiff.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Cardiff with this policy.

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

Once all potential Cardiff to Washington, D.C. 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 Cardiff to Washington, D.C. right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Washington, D.C. from Cardiff. 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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