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.

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.

£447 Cheap Flights from Cardiff to Washington, D.C. in 2026

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

Return

One-way

Cheap return flights

Enter your travel dates to find the best prices.

17:15 - 15:35CWL Cardiff Wales-IAD Washington, D.C. Dulles Intl

27h 20m1 stop Amsterdam Schiphol

18:10 - 09:15IAD Washington, D.C. Dulles Intl-CWL Cardiff Wales

10h 05m1 stop Amsterdam Schiphol

£638KLM

Mon, 21 Sep - Mon, 28 Sep

09:45 - 15:35CWL Cardiff Wales-IAD Washington, D.C. Dulles Intl

10h 50m1 stop Amsterdam Schiphol

12:25 - 09:15IAD Washington, D.C. Dulles Intl-CWL Cardiff Wales

15h 50m2 stops New York John F Kennedy Intl Amsterdam Schiphol

£644Delta

Mon, 21 Sep - Mon, 28 Sep

09:45 - 21:25CWL Cardiff Wales-BWI Baltimore/Washington

16h 40m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

13:55 - 09:15BWI Baltimore/Washington-CWL Cardiff Wales

14h 20m2 stops Boston Logan Intl Amsterdam Schiphol

£648KLM

Mon, 21 Sep - Mon, 28 Sep

09:45 - 23:35CWL Cardiff Wales-DCA Washington, D.C. Reagan-National

18h 50m2 stops Amsterdam Schiphol Boston Logan Intl

10:14 - 09:15DCA Washington, D.C. Reagan-National-CWL Cardiff Wales

18h 01m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol

£648Delta

Mon, 21 Sep - Mon, 28 Sep

09:45 - 23:14CWL Cardiff Wales-IAD Washington, D.C. Dulles Intl

18h 29m2 stops Amsterdam Schiphol Detroit Metropolitan Wayne County

12:25 - 09:15IAD Washington, D.C. Dulles Intl-CWL Cardiff Wales

15h 50m2 stops New York John F Kennedy Intl Amsterdam Schiphol

£648Delta

Mon, 21 Sep - Mon, 28 Sep

17:15 - 15:35CWL Cardiff Wales-IAD Washington, D.C. Dulles Intl

27h 20m1 stop Amsterdam Schiphol

17:30 - 09:15IAD Washington, D.C. Dulles Intl-CWL Cardiff Wales

10h 45m1 stop Amsterdam Schiphol

£666KLM

Sun, 20 Sep - Sun, 27 Sep

17:15 - 17:46CWL Cardiff Wales-IAD Washington, D.C. Dulles Intl

29h 31m2 stops Amsterdam Schiphol New York John F Kennedy Intl

17:30 - 09:15IAD Washington, D.C. Dulles Intl-CWL Cardiff Wales

10h 45m1 stop Amsterdam Schiphol

£670KLM

Sun, 20 Sep - Sun, 27 Sep

09:45 - 15:35CWL Cardiff Wales-IAD Washington, D.C. Dulles Intl

10h 50m1 stop Amsterdam Schiphol

17:30 - 09:15IAD Washington, D.C. Dulles Intl-CWL Cardiff Wales

10h 45m1 stop Amsterdam Schiphol

£676KLM

Fri, 9 Oct - Fri, 16 Oct

09:45 - 15:35CWL Cardiff Wales-IAD Washington, D.C. Dulles Intl

10h 50m1 stop Amsterdam Schiphol

12:30 - 09:15IAD Washington, D.C. Dulles Intl-CWL Cardiff Wales

15h 45m2 stops New York John F Kennedy Intl Amsterdam Schiphol

£688Multiple Airlines

Fri, 9 Oct - Fri, 16 Oct

09:45 - 22:58CWL Cardiff Wales-BWI Baltimore/Washington

18h 13m2 stops Amsterdam Schiphol Boston Logan Intl

13:55 - 09:15BWI Baltimore/Washington-CWL Cardiff Wales

14h 20m2 stops Boston Logan Intl Amsterdam Schiphol

£692Delta

Fri, 9 Oct - Fri, 16 Oct

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KLM flights from Cardiff to Washington, D.C.

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

KLM

21 Sept

CWL17:15Cardiff Wales

27h 20m

1 stop

IAD15:35Washington, D.C. Dulles Intl

28 Sept

IAD18:10Washington, D.C. Dulles Intl

10h 05m

1 stop

CWL09:15Cardiff Wales

£638

KLM

21 Sept

CWL09:45Cardiff Wales

16h 40m

2 stops

BWI21:25Baltimore/Washington

28 Sept

BWI13:55Baltimore/Washington

14h 20m

2 stops

CWL09:15Cardiff Wales

£648

KLM

20 Sept

CWL17:15Cardiff Wales

27h 20m

1 stop

IAD15:35Washington, D.C. Dulles Intl

27 Sept

IAD17:30Washington, D.C. Dulles Intl

10h 45m

1 stop

CWL09:15Cardiff Wales

£666

Delta flights from Cardiff to Washington, D.C.

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

Delta

21 Sept

CWL09:45Cardiff Wales

10h 50m

1 stop

IAD15:35Washington, D.C. Dulles Intl

28 Sept

IAD12:25Washington, D.C. Dulles Intl

15h 50m

2 stops

CWL09:15Cardiff Wales

£644

Delta

21 Sept

CWL09:45Cardiff Wales

18h 29m

2 stops

IAD23:14Washington, D.C. Dulles Intl

28 Sept

IAD12:25Washington, D.C. Dulles Intl

15h 50m

2 stops

CWL09:15Cardiff Wales

£648

Delta

9 Oct

CWL09:45Cardiff Wales

18h 13m

2 stops

BWI22:58Baltimore/Washington

16 Oct

BWI13:55Baltimore/Washington

14h 20m

2 stops

CWL09:15Cardiff Wales

£692

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Mon 21/9

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Mon 28/9

18:10-09:15

1 stop10h 05m

£638

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Mon 21/9

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Mon 28/9

12:25-09:15

2 stops15h 50m

£644

CardiffBaltimore

CWL Cardiff Wales - BWI Baltimore/Washington

CWLBWI

Cardiff Wales

Mon 21/9

09:45-21:25

2 stops16h 40m

Baltimore/Washington

Mon 28/9

13:55-09:15

2 stops14h 20m

£648

CardiffWashington, D.C.

CWL Cardiff Wales - DCA Washington, D.C. Reagan-National

CWLDCA

Cardiff Wales

Mon 21/9

09:45-23:35

2 stops18h 50m

Washington, D.C. Reagan-National

Mon 28/9

10:14-09:15

2 stops18h 01m

£648

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Mon 21/9

09:45-23:14

2 stops18h 29m

Washington, D.C. Dulles Intl

Mon 28/9

12:25-09:15

2 stops15h 50m

£648

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Sun 20/9

17:15-15:35

1 stop27h 20m

Washington, D.C. Dulles Intl

Sun 27/9

17:30-09:15

1 stop10h 45m

£666

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Sun 20/9

17:15-17:46

2 stops29h 31m

Washington, D.C. Dulles Intl

Sun 27/9

17:30-09:15

1 stop10h 45m

£670

Fastest return journey

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Fri 9/10

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Fri 16/10

17:30-09:15

1 stop10h 45m

£676

CardiffWashington, D.C.

CWL Cardiff Wales - IAD Washington, D.C. Dulles Intl

CWLIAD

Cardiff Wales

Fri 9/10

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Fri 16/10

12:30-09:15

2 stops15h 45m

£688

CardiffBaltimore

CWL Cardiff Wales - BWI Baltimore/Washington

CWLBWI

Cardiff Wales

Fri 9/10

09:45-22:58

2 stops18h 13m

Baltimore/Washington

Fri 16/10

13:55-09:15

2 stops14h 20m

£692

Flights are sorted by cheapest return flights first.

Showing 1-10 of 14 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

Prices

Airlines

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

You could potentially save up to 61% on your flight if you consider stops on a Cardiff to Washington, D.C. flight.

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.

Best price found	£447
Fastest flight time	10h 50m
Direct flights	None

The best one-way flight to Washington, D.C. from Cardiff in the past 72 hours is £447. The best return flight deal from Cardiff to Washington, D.C. found on momondo in the last 72 hours is £638.

The fastest flight from Cardiff to Washington, D.C. takes 10h 50m

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

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

How far is Cardiff Wales to Washington, D.C. by plane?
There are 3537.5 mi between Cardiff Wales and Washington, D.C.. 10h 50m 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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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.

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Fly into one of these airports located in Washington, D.C.

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Cheap flights from Cardiff to Washington, D.C. from £447

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 18/9. 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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KLM flights from Cardiff to Washington, D.C.

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

Delta flights from Cardiff to Washington, D.C.

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

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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.

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

What is the cheapest airline that flies from Cardiff Wales to Washington, D.C.?

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

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

Best price found

Fastest flight time

Direct flights

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

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

Why use momondo?

An easier way to manage your Washington, D.C. 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.

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Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Washington, D.C.

List of cabin classes available on flights landing in Washington, D.C.. Availability may vary depending on flight origin and airline.

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