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Cheap flights from Cardiff to Washington, D.C. from $480

This is the cheapest one-way 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 5/25. 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

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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
10:50 pm - 7:50 pm
CWL
-
IAD
26h 00m
2 stops
Multiple Airlines Logo
1:20 pm - 10:20 pm
IAD
-
CWL
28h 00m
2 stops
$880Multiple Airlines
Thu, Apr 9 - Thu, Apr 16
Multiple Airlines Logo
10:25 am - 3:30 pm
CWL
-
IAD
34h 05m
2 stops
Multiple Airlines Logo
8:55 pm - 10:50 pm
IAD
-
CWL
20h 55m
1 stop
$905Multiple Airlines
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
10:50 pm - 3:10 pm
CWL
-
IAD
21h 20m
2 stops
Multiple Airlines Logo
8:40 pm - 10:20 pm
IAD
-
CWL
20h 40m
1 stop
$926Multiple Airlines
Thu, Apr 9 - Thu, Apr 16
Multiple Airlines Logo
10:50 pm - 3:10 pm
CWL
-
IAD
21h 20m
2 stops
Multiple Airlines Logo
8:30 pm - 9:15 am
IAD
-
CWL
31h 45m
3 stops
$934Multiple Airlines
Thu, Apr 9 - Thu, Apr 16
Multiple Airlines Logo
5:15 pm - 3:10 pm
CWL
-
IAD
26h 55m
3 stops
Multiple Airlines Logo
8:30 pm - 9:15 am
IAD
-
CWL
31h 45m
3 stops
$950Multiple Airlines
Thu, Apr 9 - Thu, Apr 16
Multiple Airlines Logo
11:50 pm - 3:10 pm
CWL
-
IAD
44h 20m
2 stops
Multiple Airlines Logo
5:15 pm - 10:25 pm
IAD
-
CWL
24h 10m
1 stop
$971Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
KLM Logo
5:15 pm - 3:35 pm
CWL
-
IAD
27h 20m
1 stop
KLM Logo
6:10 pm - 9:15 am
IAD
-
CWL
10h 05m
1 stop
$983KLM
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
10:25 pm - 4:09 pm
CWL
-
IAD
22h 44m
2 stops
Multiple Airlines Logo
8:30 pm - 10:50 pm
IAD
-
CWL
21h 20m
3 stops
$1,016Multiple Airlines
Mon, Apr 6 - Mon, Apr 13
KLM Logo
9:45 am - 9:24 pm
CWL
-
IAD
16h 39m
2 stops
KLM Logo
9:45 pm - 4:45 pm
IAD
-
CWL
14h 00m
2 stops
$1,018KLM
Mon, May 11 - Mon, May 18
Multiple Airlines Logo
10:25 pm - 9:18 pm
CWL
-
IAD
27h 53m
3 stops
Multiple Airlines Logo
8:30 pm - 10:50 pm
IAD
-
CWL
21h 20m
3 stops
$1,031Multiple Airlines
Mon, Apr 6 - Mon, Apr 13

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

Our best Delta deals on Cardiff to Washington, D.C. Dulles Intl Airport flight tickets
Delta
Mar 16
CWL10:20 amCardiff Wales
36h 59m
2 stops
IAD7:19 pmWashington, D.C. Dulles Intl
Mar 26
IAD12:47 pmWashington, D.C. Dulles Intl
23h 58m
2 stops
CWL4:45 pmCardiff Wales
$1,128
Delta
Apr 8
CWL9:45 amCardiff Wales
10h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
Apr 15
IAD6:10 pmWashington, D.C. Dulles Intl
17h 35m
1 stop
CWL4:45 pmCardiff Wales
$1,145
Delta
Apr 8
CWL9:45 amCardiff Wales
18h 14m
2 stops
IAD10:59 pmWashington, D.C. Dulles Intl
Apr 15
IAD11:04 amWashington, D.C. Dulles Intl
17h 11m
2 stops
CWL9:15 amCardiff Wales
$1,151

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
May 11
CWL5:15 pmCardiff Wales
27h 20m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
May 18
IAD6:10 pmWashington, D.C. Dulles Intl
10h 05m
1 stop
CWL9:15 amCardiff Wales
$983
KLM
May 11
CWL9:45 amCardiff Wales
16h 39m
2 stops
IAD9:24 pmWashington, D.C. Dulles Intl
May 18
IAD9:45 pmWashington, D.C. Dulles Intl
14h 00m
2 stops
CWL4:45 pmCardiff Wales
$1,018

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 February 24, 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

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 4/9

10:50 pm-7:50 pm

2 stops26h 00m

Washington, D.C. Dulles Intl

Thu 4/16

1:20 pm-10:20 pm

2 stops28h 00m

$880

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 5/11

10:25 am-3:30 pm

2 stops34h 05m

Washington, D.C. Dulles Intl

Mon 5/18

8:55 pm-10:50 pm

1 stop20h 55m

$905

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 4/9

10:50 pm-3:10 pm

2 stops21h 20m

Washington, D.C. Dulles Intl

Thu 4/16

8:40 pm-10:20 pm

1 stop20h 40m

$926

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 4/9

10:50 pm-3:10 pm

2 stops21h 20m

Washington, D.C. Dulles Intl

Thu 4/16

8:30 pm-9:15 am

3 stops31h 45m

$934

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Thu 4/9

5:15 pm-3:10 pm

3 stops26h 55m

Washington, D.C. Dulles Intl

Thu 4/16

8:30 pm-9:15 am

3 stops31h 45m

$950

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 4/8

11:50 pm-3:10 pm

2 stops44h 20m

Washington, D.C. Dulles Intl

Wed 4/15

5:15 pm-10:25 pm

1 stop24h 10m

$971

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 5/11

5:15 pm-3:35 pm

1 stop27h 20m

Washington, D.C. Dulles Intl

Mon 5/18

6:10 pm-9:15 am

1 stop10h 05m

$983

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 4/6

10:25 pm-4:09 pm

2 stops22h 44m

Washington, D.C. Dulles Intl

Mon 4/13

8:30 pm-10:50 pm

3 stops21h 20m

$1,016

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 5/11

9:45 am-9:24 pm

2 stops16h 39m

Washington, D.C. Dulles Intl

Mon 5/18

9:45 pm-4:45 pm

2 stops14h 00m

$1,018

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Mon 4/6

10:25 pm-9:18 pm

3 stops27h 53m

Washington, D.C. Dulles Intl

Mon 4/13

8:30 pm-10:50 pm

3 stops21h 20m

$1,031

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 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 7% 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

26h 00m

Direct flights

None
The fastest flight from Cardiff to Washington, D.C. Dulles Intl Airport takes 26h 00m
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

  • 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 26h 00m 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
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Colonial Beach
Laurel
Towson
Silver Spring
Gaithersburg
Tysons
Fredericksburg
Rockville
Manassas
Springfield
Fairfax
Bethesda
Sterling

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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