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.

£589 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.

Round-trip

One-way

Cheap return flights

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10:20 - 22:48

CWL

DCA

17h 28m2 stops

15:40 - 16:55

DCA

CWL

20h 15m2 stops

£589Delta

tors, 5 feb - mån, 9 feb

10:20 - 00:12

CWL

IAD

18h 52m2 stops

18:05 - 09:50

IAD

CWL

10h 45m1 stop

£1,302Multiple Airlines

fre, 2 jan - sön, 4 jan

10:20 - 00:12

CWL

IAD

18h 52m2 stops

18:50 - 16:45

IAD

CWL

16h 55m2 stops

£1,380Multiple Airlines

fre, 2 jan - sön, 4 jan

10:20 - 15:35

CWL

IAD

34h 15m2 stops

22:55 - 09:50

IAD

CWL

29h 55m3 stops

£1,583Multiple Airlines

fre, 2 jan - sön, 4 jan

17:15 - 19:30

CWL

IAD

31h 15m3 stops

22:55 - 09:50

IAD

CWL

29h 55m3 stops

£1,586Multiple Airlines

fre, 2 jan - sön, 4 jan

10:20 - 17:49

CWL

DCA

36h 29m2 stops

19:55 - 09:50

DCA

CWL

32h 55m2 stops

£1,674Virgin Atlantic

fre, 2 jan - sön, 4 jan

17:15 - 16:05

CWL

IAD

27h 50m1 stop

18:05 - 16:45

IAD

CWL

17h 40m1 stop

£1,818KLM

fre, 2 jan - sön, 4 jan

17:15 - 19:47

CWL

DCA

31h 32m3 stops

06:00 - 16:45

DCA

CWL

29h 45m3 stops

£2,190Multiple Airlines

fre, 2 jan - sön, 4 jan

17:15 - 19:47

CWL

DCA

31h 32m3 stops

06:59 - 09:50

DCA

CWL

21h 51m2 stops

£2,535Multiple Airlines

fre, 2 jan - sön, 4 jan

Fly from

Fly to

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

tors 5/2

10:20-22:48

2 stops17h 28m

Washington, D.C. Reagan-National

mån 9/2

15:40-16:55

2 stops20h 15m

£589

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

fre 2/1

10:20-00:12

2 stops18h 52m

Washington, D.C. Dulles Intl

sön 4/1

18:05-09:50

1 stop10h 45m

£1,302

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

fre 2/1

10:20-00:12

2 stops18h 52m

Washington, D.C. Dulles Intl

sön 4/1

18:50-16:45

2 stops16h 55m

£1,380

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

fre 2/1

10:20-15:35

2 stops34h 15m

Washington, D.C. Dulles Intl

sön 4/1

22:55-09:50

3 stops29h 55m

£1,583

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

fre 2/1

17:15-19:30

3 stops31h 15m

Washington, D.C. Dulles Intl

sön 4/1

22:55-09:50

3 stops29h 55m

£1,586

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

fre 2/1

10:20-17:49

2 stops36h 29m

Washington, D.C. Reagan-National

sön 4/1

19:55-09:50

2 stops32h 55m

£1,674

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

fre 2/1

17:15-16:05

1 stop27h 50m

Washington, D.C. Dulles Intl

sön 4/1

18:05-16:45

1 stop17h 40m

£1,818

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

fre 2/1

17:15-19:47

3 stops31h 32m

Washington, D.C. Reagan-National

sön 4/1

06:00-16:45

3 stops29h 45m

£2,190

CardiffWashington, D.C.

CWL - DCA

CWLDCA

Cardiff Wales

fre 2/1

17:15-19:47

3 stops31h 32m

Washington, D.C. Reagan-National

sön 4/1

06:59-09:50

2 stops21h 51m

£2,535

Flights are sorted by cheapest return flights first.

Sorted 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

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	18h 52m
Direct flights	None

The fastest flight from Cardiff to Washington, D.C. takes 18h 52m

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.. 18h 52m 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.