How long is the flight from Washington, D.C. Dulles Intl Airport to Cardiff?

Departing from Washington, D.C. Dulles Intl Airport to Cardiff will take you 10h 35m. Washington, D.C. Dulles Intl Airport and Cardiff are separated by a distance of 3548 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in Cardiff ranges from 50.0 - 90.0 inches per month. January is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Cardiff when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Cardiff, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

What is the cheapest time of day to fly from IAD to CWL?

When flying from Washington, D.C. Dulles Intl Airport to Cardiff, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly into for flights to Cardiff from Washington, D.C. Dulles Intl?

Located just 9.1 mi from the city center, Cardiff Wales is the airport most travelers will use when flying to Cardiff from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Cardiff Wales (CWL) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 0 different airlines.

Can I find deals for flights from Dulles Intl to Cardiff that include hotel bookings?

Yes. In addition to deals on Dulles Intl to Cardiff flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Dulles Intl to Cardiff?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Cardiff.

Can I find deals for business class flights from Dulles Intl to Cardiff?

Yes. Cheapflights offers flight deals from Dulles Intl to Cardiff by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£318+ Cheap Flights from Washington, D.C. Dulles Intl Airport to Cardiff

Cheap flight deals from Dulles Intl to Cardiff

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Dulles Intl to Cardiff
Explore the most affordable flight options available from Dulles Intl to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 November 2026.

Thu 31/1219:40 -

2 stops15h 00m

Mon 4/108:35 -

2 stops32h 10m

Deal found 4/11£929

Sat 19/1219:40 -

2 stops13h 15m

Sat 26/1208:15 -

2 stops15h 15m

Deal found 4/11£1,166

Thu 17/1217:15 -

1 stop17h 25m

Thu 24/1213:25 -

2 stops31h 55m

Deal found 2/11£1,178

Tue 1/1221:45 -

2 stops29h 45m

Thu 10/1209:00 -

2 stops35h 40m

Deal found 1/11£1,304

Thu 17/1218:15 -

1 stop10h 35m

Thu 24/1217:30 -

1 stop27h 25m

Deal found 2/11£1,326

Find flight deals from Dulles Intl to Cardiff

Round-trip from	£753
One-way from	£318

11/4-14/4
4 total stops
49h 55m total
Washington, D.C. to Cardiff

Search Deals

9/4-31/12
2 total stops
13h 45m total
Washington, D.C. to Cardiff

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Cardiff that are best for you.

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Fly to

Route

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Return

Price

Cheapest return flight

Fastest return journey

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Fri 9/4

20:30-15:15

2 stops13h 45m

Cardiff Wales

Wed 31/12

00:00-18:00

Nonstop0h 00m

£318

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Sun 11/4

17:15-14:45

1 stop16h 30m

Cardiff Wales

Wed 14/4

16:10-20:35

3 stops33h 25m

£753

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Sun 11/4

17:40-09:15

1 stop10h 35m

Cardiff Wales

Wed 14/4

09:50-15:35

1 stop10h 45m

£841

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Mon 1/3

19:29-17:00

2 stops16h 31m

Cardiff Wales

Tue 9/3

17:30-15:55

1 stop27h 25m

£841

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Mon 1/3

17:37-17:00

2 stops18h 23m

Cardiff Wales

Tue 9/3

10:20-23:02

2 stops17h 42m

£848

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Wed 13/1

06:01-09:50

2 stops22h 49m

Cardiff Wales

Wed 20/1

10:20-00:46

2 stops19h 26m

£911

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Wed 13/1

09:00-09:50

2 stops19h 50m

Cardiff Wales

Wed 20/1

10:20-23:17

2 stops17h 57m

£911

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Thu 31/12

19:40-15:40

2 stops15h 00m

Cardiff Wales

Mon 4/1

08:35-11:45

2 stops32h 10m

£929

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Sat 19/12

19:40-13:55

2 stops13h 15m

Cardiff Wales

Sat 26/12

08:15-18:30

2 stops15h 15m

£1,166

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Thu 17/12

17:15-15:40

1 stop17h 25m

Cardiff Wales

Thu 24/12

13:25-16:20

2 stops31h 55m

£1,178

Flights are sorted by cheapest return flights first.

Deals found on 4/11

Sorted by cheapest first

Best time to book a flight from Dulles Intl to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Dulles Intl with our price prediction graph.

IAD-CWL

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

What airport do you fly into for flights to Cardiff from Washington, D.C. Dulles Intl?
Located just 9.1 mi from the city center, Cardiff Wales is the airport most travelers will use when flying to Cardiff from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Cardiff Wales (CWL) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 0 different airlines.
How long is the flight from Washington, D.C. Dulles Intl Airport to Cardiff?
Departing from Washington, D.C. Dulles Intl Airport to Cardiff will take you 10h 35m. Washington, D.C. Dulles Intl Airport and Cardiff are separated by a distance of 3548 mi. This flight may include one or multiple stops.
Can I find deals for flights from Dulles Intl to Cardiff that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Cardiff flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Cardiff?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Cardiff.
Can I find deals for business class flights from Dulles Intl to Cardiff?
Yes. Cheapflights offers flight deals from Dulles Intl to Cardiff by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £318

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Dulles Intl to Cardiff

Cheapest flights from Dulles Intl to CardiffExplore the most affordable flight options available from Dulles Intl to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 November 2026.

Explore the most affordable flight options available from Dulles Intl to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 November 2026.

Best flights from Dulles Intl to CardiffDiscover carefully curated flight deals from Dulles Intl to Cardiff that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 November 2026.

Discover carefully curated flight deals from Dulles Intl to Cardiff that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 November 2026.

Last-minute flights from Dulles Intl to CardiffDiscover last-minute flight deals from Dulles Intl to Cardiff. Data last updated 5 November 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Cardiff. Data last updated 5 November 2026 and is based on user searches.

One-way flights from Dulles Intl to CardiffSearch for one-way flight options from Dulles Intl to Cardiff. Find affordable one-way fares based on user searches. Data last updated 5 November 2026.

Search for one-way flight options from Dulles Intl to Cardiff. Find affordable one-way fares based on user searches. Data last updated 5 November 2026.

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Best time to book a flight from Dulles Intl to Cardiff

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Related info for your journey

What airport do you fly into for flights to Cardiff from Washington, D.C. Dulles Intl?

How long is the flight from Washington, D.C. Dulles Intl Airport to Cardiff?

Can I find deals for flights from Dulles Intl to Cardiff that include hotel bookings?

How can I find direct flights from Dulles Intl to Cardiff?

Can I find deals for business class flights from Dulles Intl to Cardiff?

Travelling to a place near Cardiff?

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Alternative routes for Dulles Intl to Cardiff

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Explore flights to Cardiff departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 5 November 2026.

Complete your trip

Complete your trip to Cardiff by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Wales

Book a non-stop flight to one of these other cities located in Wales.

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Dulles Intl and Cardiff flights

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Cheapest flights from Dulles Intl to Cardiff
Explore the most affordable flight options available from Dulles Intl to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 November 2026.

Best flights from Dulles Intl to Cardiff
Discover carefully curated flight deals from Dulles Intl to Cardiff that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 November 2026.

Last-minute flights from Dulles Intl to Cardiff
Discover last-minute flight deals from Dulles Intl to Cardiff. Data last updated 5 November 2026 and is based on user searches.

One-way flights from Dulles Intl to Cardiff
Search for one-way flight options from Dulles Intl to Cardiff. Find affordable one-way fares based on user searches. Data last updated 5 November 2026.