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

Airlines like Virgin Atlantic fly from Cardiff to Washington, D.C. Dulles Intl Airport in about 27h 25m. The time it takes to get you to your destination can typically vary by up to . The distance between Cardiff and Washington, D.C. Dulles Intl Airport is about 3548 mi.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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

When flying from Cardiff to Washington, D.C. Dulles Intl Airport, 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 from for flights from Cardiff to Washington, D.C. Dulles Intl?

Cardiff Wales (CWL) is the airport you will fly out of if you book a flight from Cardiff to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Cardiff Wales; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Cardiff airport to Washington, D.C. Dulles Intl. It is only a 9.1 mi journey to Cardiff Wales (CWL) from Cardiff’s city center.

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

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

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

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

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

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

$552+ Cheap Flights from Cardiff to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Cardiff to Dulles Intl

Cheapest

Best

Last-minute

One-way

Cheapest flights from Cardiff to Dulles Intl
Explore the most affordable flight options available from Cardiff to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.

Thu 10/295:30 pm -

1 stop27h 25m

Thu 11/512:30 pm -

2 stops16h 20m

Deal found 9/14

$883

Sun 10/119:50 am -

1 stop10h 45m

Sun 10/185:30 pm -

1 stop10h 45m

Deal found 9/13

$941

Sun 10/119:50 am -

1 stop10h 45m

Sun 10/1812:30 pm -

2 stops15h 45m

Deal found 9/13

$964

Thu 9/1710:50 pm -

2 stops20h 35m

Mon 9/215:15 pm -

1 stop24h 35m

Deal found 9/11

$1,003

Sun 10/255:30 pm -

1 stop27h 25m

Sun 11/15:45 pm -

1 stop18h 15m

Deal found 9/10

$1,009

Sun 10/259:00 am -

2 stops35h 40m

Sun 11/19:45 pm -

2 stops33h 00m

Deal found 9/10

$1,200

Best flights from Cardiff to Dulles Intl
Discover carefully curated flight deals from Cardiff to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.

Thu 10/295:30 pm -

1 stop27h 25m

Thu 11/512:30 pm -

2 stops16h 20m

Deal found 9/14

$883

Sun 10/112:45 pm -

2 stops33h 15m

Sun 10/185:17 pm -

2 stops23h 28m

Deal found 9/13

$984

Sun 10/259:00 am -

2 stops35h 40m

Sun 11/19:45 pm -

2 stops33h 00m

Deal found 9/10

$1,200

Sun 10/255:30 pm -

1 stop27h 25m

Sun 11/15:45 pm -

1 stop18h 15m

Deal found 9/10

$1,009

Thu 10/291:25 pm -

2 stops27h 20m

Thu 11/57:40 pm -

3 stops16h 20m

Deal found 9/14

$1,409

Last-minute flights from Cardiff to Dulles Intl
Discover last-minute flight deals from Cardiff to Dulles Intl. Data last updated September 15, 2026 and is based on user searches.

Thu 9/1710:50 pm -

2 stops20h 35m

Mon 9/215:15 pm -

1 stop24h 35m

Deal found 9/11

$1,003

Sun 10/119:50 am -

1 stop10h 45m

Sun 10/185:30 pm -

1 stop10h 45m

Deal found 9/13

$941

Sun 10/119:50 am -

1 stop10h 45m

Sun 10/1812:30 pm -

2 stops15h 45m

Deal found 9/13

$964

Sun 10/255:30 pm -

1 stop27h 25m

Sun 11/15:45 pm -

1 stop18h 15m

Deal found 9/10

$1,009

Sun 10/259:00 am -

2 stops35h 40m

Sun 11/19:45 pm -

2 stops33h 00m

Deal found 9/10

$1,200

Thu 10/295:30 pm -

1 stop27h 25m

Thu 11/512:30 pm -

2 stops16h 20m

Deal found 9/14

$883

Find flight deals from Cardiff to Dulles Intl

Round-trip from	$883 (Virgin Atlantic)
One-way from	$552 (Trip.com)

From Cardiff Wales to Washington, D.C. Dulles Intl

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One-way flight from Cardiff Wales to Washington, D.C. Dulles Intl

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

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Fly to

Route

Depart

Return

Price

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Quickest round-trip

CardiffWashington, D.C.

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

CWLIAD

Cardiff Wales

Thu 10/22

4:20 pm-7:00 pm

2 stops31h 40m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$552

CardiffWashington, D.C.

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

CWLIAD

Cardiff Wales

Sun 10/25

11:50 pm-7:30 pm

3 stops47h 40m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-6:00 am

Nonstop0h 00m

$613

CardiffWashington, D.C.

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

CWLIAD

Cardiff Wales

Thu 10/29

5:30 pm-4:55 pm

1 stop27h 25m

Washington, D.C. Dulles Intl

Thu 11/5

12:30 pm-9:50 am

2 stops16h 20m

$883

CardiffWashington, D.C.

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

CWLIAD

Cardiff Wales

Sun 10/11

2:45 pm-7:00 pm

2 stops33h 15m

Washington, D.C. Dulles Intl

Sun 10/18

5:17 pm-9:45 pm

2 stops23h 28m

$984

CardiffWashington, D.C.

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

CWLIAD

Cardiff Wales

Sun 10/25

5:30 pm-4:55 pm

1 stop27h 25m

Washington, D.C. Dulles Intl

Sun 11/1

5:45 pm-5:00 pm

1 stop18h 15m

$1,009

CardiffWashington, D.C.

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

CWLIAD

Cardiff Wales

Sun 10/25

9:00 am-4:40 pm

2 stops35h 40m

Washington, D.C. Dulles Intl

Sun 11/1

9:45 pm-11:45 am

2 stops33h 00m

$1,200

CardiffWashington, D.C.

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

CWLIAD

Cardiff Wales

Thu 10/29

1:25 pm-12:45 pm

2 stops27h 20m

Washington, D.C. Dulles Intl

Thu 11/5

7:40 pm-5:00 pm

3 stops16h 20m

$1,409

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Sorted by cheapest first

Best time to book a flight from Cardiff to Dulles Intl

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

CWL-IAD

Estimated round-trip 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 from for flights from Cardiff to Washington, D.C. Dulles Intl?
Cardiff Wales (CWL) is the airport you will fly out of if you book a flight from Cardiff to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Cardiff Wales; the airport handles an average of 0 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Cardiff airport to Washington, D.C. Dulles Intl. It is only a 9.1 mi journey to Cardiff Wales (CWL) from Cardiff’s city center.
How long is the flight from Cardiff to Washington, D.C. Dulles Intl Airport?
Airlines like Virgin Atlantic fly from Cardiff to Washington, D.C. Dulles Intl Airport in about 27h 25m. The time it takes to get you to your destination can typically vary by up to . The distance between Cardiff and Washington, D.C. Dulles Intl Airport is about 3548 mi.
Can I find deals for flights from Cardiff to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Cardiff to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Cardiff to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Dulles Intl.
Can I find deals for business class flights from Cardiff to Dulles Intl?
Yes. Cheapflights offers flight deals from Cardiff to Dulles Intl 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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$552+ Cheap flights from Cardiff (CWL) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Cardiff to Dulles Intl with Cheapflights

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Cheap flight deals from Cardiff to Dulles Intl

Cheapest flights from Cardiff to Dulles IntlExplore the most affordable flight options available from Cardiff to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.

Explore the most affordable flight options available from Cardiff to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.

Best flights from Cardiff to Dulles IntlDiscover carefully curated flight deals from Cardiff to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.

Discover carefully curated flight deals from Cardiff to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.

Last-minute flights from Cardiff to Dulles IntlDiscover last-minute flight deals from Cardiff to Dulles Intl. Data last updated September 15, 2026 and is based on user searches.

Discover last-minute flight deals from Cardiff to Dulles Intl. Data last updated September 15, 2026 and is based on user searches.

One-way flights from Cardiff to Dulles IntlSearch for one-way flight options from Cardiff to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.

Search for one-way flight options from Cardiff to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.

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

Best time to book a flight from Cardiff to Dulles Intl

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Related info for your journey

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

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

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

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

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

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Other flights to Dulles Intl

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Cheapest flights from Cardiff to Dulles Intl
Explore the most affordable flight options available from Cardiff to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.

Best flights from Cardiff to Dulles Intl
Discover carefully curated flight deals from Cardiff to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.

Last-minute flights from Cardiff to Dulles Intl
Discover last-minute flight deals from Cardiff to Dulles Intl. Data last updated September 15, 2026 and is based on user searches.

One-way flights from Cardiff to Dulles Intl
Search for one-way flight options from Cardiff to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 15, 2026.