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

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

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

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..

What documentation or ID do you need to fly to Washington, D.C.?

The required travel and health documents for your Washington, D.C. 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 Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£345 Cheap Flights from Cardiff to Washington, D.C. in 2025/26

1 adult

0 bags

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

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17:25 - 16:05

CWL

IAD

27h 40m1 stop

19:30 - 16:55

IAD

CWL

16h 25m2 stops

£547KLM

Wed, 4 Feb - Wed, 11 Feb

17:30 - 16:05

CWL

IAD

27h 35m1 stop

18:05 - 09:50

IAD

CWL

10h 45m1 stop

£549KLM

Sun, 18 Jan - Sun, 25 Jan

10:20 - 23:06

CWL

IAD

17h 46m2 stops

19:30 - 16:55

IAD

CWL

16h 25m2 stops

£552KLM

Wed, 4 Feb - Wed, 11 Feb

10:20 - 22:57

CWL

DCA

17h 37m2 stops

19:30 - 16:55

DCA

CWL

16h 25m2 stops

£552KLM

Wed, 4 Feb - Wed, 11 Feb

10:15 - 19:09

CWL

IAD

13h 54m2 stops

12:40 - 09:50

IAD

CWL

16h 10m2 stops

£562KLM

Sun, 18 Jan - Sun, 25 Jan

10:20 - 09:24

CWL

BWI

28h 04m2 stops

18:59 - 16:55

BWI

CWL

16h 56m2 stops

£581KLM

Wed, 4 Feb - Wed, 11 Feb

15:55 - 15:15

CWL

IAD

28h 20m2 stops

19:40 - 08:05

IAD

CWL

31h 25m3 stops

£780Multiple Airlines

Wed, 4 Feb - Wed, 11 Feb

21:20 - 15:15

CWL

IAD

22h 55m2 stops

19:40 - 09:50

IAD

CWL

33h 10m3 stops

£789Multiple Airlines

Sun, 18 Jan - Sun, 25 Jan

10:15 - 14:40

CWL

IAD

33h 25m3 stops

18:00 - 09:50

IAD

CWL

34h 50m3 stops

£823Multiple Airlines

Sun, 18 Jan - Sun, 25 Jan

15:55 - 15:35

CWL

IAD

28h 40m1 stop

17:05 - 10:05

IAD

CWL

12h 00m1 stop

£844Multiple Airlines

Wed, 4 Feb - Wed, 11 Feb

KLM flights from Cardiff to Washington, D.C.

Our best KLM deals on Cardiff to Washington, D.C. flight tickets

KLM

4 Feb

CWL17:25Cardiff Wales

27h 40m

1 stop

IAD16:05Washington, D.C. Dulles Intl

11 Feb

IAD19:30Washington, D.C. Dulles Intl

16h 25m

2 stops

CWL16:55Cardiff Wales

£547

Find similar

KLM

18 Jan

CWL17:30Cardiff Wales

27h 35m

1 stop

IAD16:05Washington, D.C. Dulles Intl

25 Jan

IAD18:05Washington, D.C. Dulles Intl

10h 45m

1 stop

CWL09:50Cardiff Wales

£549

Find similar

KLM

4 Feb

CWL10:20Cardiff Wales

17h 46m

2 stops

IAD23:06Washington, D.C. Dulles Intl

11 Feb

IAD19:30Washington, D.C. Dulles Intl

16h 25m

2 stops

CWL16:55Cardiff Wales

£552

Find similar

Fly from

Fly to

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 4/2

17:25-16:05

1 stop27h 40m

Washington, D.C. Dulles Intl

Wed 11/2

19:30-16:55

2 stops16h 25m

£547

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 18/1

17:30-16:05

1 stop27h 35m

Washington, D.C. Dulles Intl

Sun 25/1

18:05-09:50

1 stop10h 45m

£549

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 4/2

10:20-23:06

2 stops17h 46m

Washington, D.C. Dulles Intl

Wed 11/2

19:30-16:55

2 stops16h 25m

£552

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

Wed 4/2

10:20-22:57

2 stops17h 37m

Washington, D.C. Reagan-National

Wed 11/2

19:30-16:55

2 stops16h 25m

£552

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 18/1

10:15-19:09

2 stops13h 54m

Washington, D.C. Dulles Intl

Sun 25/1

12:40-09:50

2 stops16h 10m

£562

CardiffBaltimore

CWL - BWI

CWLBWI

Cardiff Wales

Wed 4/2

10:20-09:24

2 stops28h 04m

Baltimore/Washington

Wed 11/2

18:59-16:55

2 stops16h 56m

£581

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 4/2

15:55-15:15

2 stops28h 20m

Washington, D.C. Dulles Intl

Wed 11/2

19:40-08:05

3 stops31h 25m

£780

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 18/1

21:20-15:15

2 stops22h 55m

Washington, D.C. Dulles Intl

Sun 25/1

19:40-09:50

3 stops33h 10m

£789

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sun 18/1

10:15-14:40

3 stops33h 25m

Washington, D.C. Dulles Intl

Sun 25/1

18:00-09:50

3 stops34h 50m

£823

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Wed 4/2

15:55-15:35

1 stop28h 40m

Washington, D.C. Dulles Intl

Wed 11/2

17:05-10:05

1 stop12h 00m

£844

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

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

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 Cardiff Wales to Washington, D.C.?

British Airways is the most popular carrier operating from Cardiff Wales to Washington, D.C.

Which airlines fly to Washington, D.C.?

Aer Lingus, Virgin Atlantic and KLM are the top three most popular airlines that fly to Washington, D.C. from Cardiff according to our data. Aer Lingus is the first choice among our users, with 67% of people opting to fly with this airline when travelling to Washington, D.C.. Keep in mind that there are 3 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

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

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

Estimated return price

Cheap Cardiff to Washington, D.C. (CWL to WAS) flight deals and tips

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

Fastest flight time	17h 37m
Direct flights	None

The fastest flight from Cardiff to Washington, D.C. takes 17h 37m

There are no direct flights from Cardiff to Washington, D.C.. There are no popular flight routes from Cardiff to Washington, D.C..

Search flight deals

How far is Cardiff Wales to Washington, D.C. by plane?
There are 3537.5 mi between Cardiff Wales and Washington, D.C.. 17h 37m is a normal flight duration for this route.
When did momondo last update prices for flights from Cardiff Wales Airport to Washington, D.C.?
Prices for flights from Cardiff Wales Airport to Washington, D.C. refresh daily.
How old do you have to be to fly from Cardiff Wales Airport to Washington, D.C.?
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..
What documentation or ID do you need to fly to Washington, D.C.?
The required travel and health documents for your Washington, D.C. 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 Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Cardiff to Washington, D.C.?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Cardiff to Washington, D.C. is KLM (100% of total bookings).

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Ellicott City

Cambridge

Westminster

Woodbridge

Silver Spring

Owings Mills

National Harbor

Why use momondo?

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

Finding the right flight to Washington, D.C. from Cardiff is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Washington, D.C. quick and easy, saving you time and money.

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.?

momondo helps you find the best flight between Cardiff and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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 can track prices for Cardiff to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.