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 30m. Washington, D.C. Dulles Intl Airport and Cardiff are separated by a distance of 3548 mi.

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.

£368+ 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 19 September 2026.

Thu 29/1021:50 -

1 stop13h 50m

Thu 5/1113:25 -

2 stops31h 55m

Deal found 14/9£640

Sun 27/917:30 -

1 stop18h 15m

Mon 12/1017:15 -

1 stop27h 20m

Deal found 19/9£705

Mon 5/1020:30 -

2 stops21h 20m

Tue 13/1023:15 -

1 stop21h 30m

Deal found 19/9£718

Sat 31/1018:50 -

2 stops33h 20m

Sat 7/1108:15 -

1 stop12h 30m

Deal found 16/9£734

Mon 2/1118:15 -

1 stop10h 30m

Mon 9/1117:30 -

1 stop27h 15m

Deal found 17/9£747

Mon 5/1018:10 -

1 stop17h 35m

Tue 13/1009:45 -

1 stop10h 50m

Deal found 19/9£748

Sun 27/919:36 -

2 stops16h 09m

Mon 12/1017:15 -

1 stop27h 20m

Deal found 19/9£749

Mon 2/1118:15 -

1 stop10h 30m

Mon 9/1117:30 -

2 stops27h 56m

Deal found 17/9£756

Mon 2/1119:40 -

3 stops35h 05m

Mon 9/1108:35 -

1 stop12h 10m

Deal found 17/9£758

Tue 6/1012:30 -

2 stops15h 45m

Tue 13/1009:45 -

2 stops37h 34m

Deal found 19/9£758

Sun 1/1117:45 -

1 stop11h 05m

Sun 8/1117:30 -

1 stop27h 25m

Deal found 17/9£769

Wed 7/1017:15 -

1 stop24h 10m

Tue 13/1023:15 -

1 stop21h 30m

Deal found 19/9£775

Find flight deals from Dulles Intl to Cardiff

Round-trip from	£640
One-way from	£368

29/10-5/11
3 total stops
45h 45m total
Washington, D.C. to Cardiff

Search Deals

29/10-31/12
3 total stops
37h 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.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Thu 29/10

20:40-14:25

3 stops37h 45m

Cardiff Wales

Wed 31/12

00:00-18:00

Nonstop0h 00m

£368

Fastest return journey

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Thu 29/10

18:45-09:50

1 stop11h 05m

Cardiff Wales

Wed 31/12

00:00-18:00

Nonstop0h 00m

£417

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Thu 22/10

17:30-16:45

1 stop18h 15m

Cardiff Wales

Wed 31/12

00:00-18:00

Nonstop0h 00m

£436

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Mon 2/11

18:15-09:45

1 stop10h 30m

Cardiff Wales

Mon 9/11

17:30-15:45

1 stop27h 15m

£747

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Mon 2/11

18:15-09:45

1 stop10h 30m

Cardiff Wales

Mon 9/11

17:30-16:26

2 stops27h 56m

£756

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Mon 2/11

19:40-11:45

3 stops35h 05m

Cardiff Wales

Mon 9/11

08:35-15:45

1 stop12h 10m

£758

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Wed 7/10

12:30-09:15

2 stops15h 45m

Cardiff Wales

Tue 13/10

09:45-15:35

1 stop10h 50m

£785

Washington, D.C.Cardiff

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

IADCWL

Washington, D.C. Dulles Intl

Thu 15/10

17:30-16:45

1 stop18h 15m

Cardiff Wales

Mon 19/10

17:15-15:35

1 stop27h 20m

£786

Flights are sorted by cheapest return flights first.

Deals found on 15/9

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 30m. Washington, D.C. Dulles Intl Airport and Cardiff are separated by a distance of 3548 mi.
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 £368

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/10. 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 19 September 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 19 September 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 19 September 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 19 September 2026.

Last-minute flights from Dulles Intl to CardiffDiscover last-minute flight deals from Dulles Intl to Cardiff. Data last updated 19 September 2026 and is based on user searches.

Discover last-minute flight deals from Dulles Intl to Cardiff. Data last updated 19 September 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 19 September 2026.

Search for one-way flight options from Dulles Intl to Cardiff. Find affordable one-way fares based on user searches. Data last updated 19 September 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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Other flights to Cardiff

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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 19 September 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 19 September 2026.

Last-minute flights from Dulles Intl to Cardiff
Discover last-minute flight deals from Dulles Intl to Cardiff. Data last updated 19 September 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 19 September 2026.