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

Airlines like Delta and Virgin Atlantic fly from Cardiff to Washington, D.C. Dulles Intl Airport in about 30h 33m. The time it takes to get you to your destination can typically vary by up to 2h 15m. The distance between Cardiff and Washington, D.C. Dulles Intl Airport is about 3548 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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.

$748+ Flights from Cardiff to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Cardiff to Dulles Intl

Round-trip from	$748 (Delta)

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

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Find flight deals from Cardiff to Dulles Intl

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 septiembre 11, 2025.

dom. 10/269:20 pmCWL - IAD

2 stops22h 55mMultiple Airlines

dom. 11/210:30 pmIAD - CWL

2 stops19h 35mMultiple Airlines

Deal found 9/11

$822

dom. 10/265:30 pmCWL - IAD

1 stop27h 35mKLM

dom. 11/26:05 pmIAD - CWL

1 stop17h 40mKLM

Deal found 9/11

$982

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 septiembre 11, 2025.

jue. 2/1910:20 amCWL - IAD

2 stops30h 33mDelta

lun. 2/231:00 pmIAD - CWL

2 stops15h 50mDelta

Deal found 9/8

$748

jue. 2/195:25 pmCWL - IAD

2 stops32h 48mVirgin Atlantic

lun. 2/236:05 pmIAD - CWL

1 stop10h 45mVirgin Atlantic

Deal found 9/10

$749

dom. 10/269:20 pmCWL - IAD

1 stop27h 10mMultiple Airlines

dom. 11/210:30 pmIAD - CWL

2 stops19h 35mMultiple Airlines

Deal found 9/11

$894

dom. 10/265:30 pmCWL - IAD

1 stop27h 35mKLM

dom. 11/26:05 pmIAD - CWL

1 stop17h 40mKLM

Deal found 9/11

$982

Last-minute flights from Cardiff to Dulles Intl
Discover last-minute flight deals from Cardiff to Dulles Intl. Data last updated septiembre 11, 2025 and is based on user searches.

dom. 10/269:20 pmCWL - IAD

2 stops22h 55mMultiple Airlines

dom. 11/210:30 pmIAD - CWL

2 stops19h 35mMultiple Airlines

Deal found 9/11

$822

dom. 10/265:30 pmCWL - IAD

1 stop27h 35mKLM

dom. 11/26:05 pmIAD - CWL

1 stop17h 40mKLM

Deal found 9/11

$982

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

jue. 2/19

10:20 am-11:53 am

2 stops30h 33m

Washington, D.C. Dulles Intl

lun. 2/23

1:00 pm-9:50 am

2 stops15h 50m

$748

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

jue. 2/19

5:25 pm-9:13 pm

2 stops32h 48m

Washington, D.C. Dulles Intl

lun. 2/23

6:05 pm-9:50 am

1 stop10h 45m

$749

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

dom. 10/26

9:20 pm-8:30 pm

1 stop27h 10m

Washington, D.C. Dulles Intl

dom. 11/2

10:30 pm-11:05 pm

2 stops19h 35m

$894

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

dom. 10/26

5:30 pm-5:05 pm

1 stop27h 35m

Washington, D.C. Dulles Intl

dom. 11/2

6:05 pm-4:45 pm

1 stop17h 40m

$982

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

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.

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.

Cheapflights Insights

Everything you need to know about your flight from Cardiff to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Cardiff to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 Delta and Virgin Atlantic fly from Cardiff to Washington, D.C. Dulles Intl Airport in about 30h 33m. The time it takes to get you to your destination can typically vary by up to 2h 15m. The distance between Cardiff and Washington, D.C. Dulles Intl Airport is about 3548 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
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.
What is the cheapest month to book a flight from Cardiff to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$748+ 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 2/19. 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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3. Compare prices and book

Cheap flight deals from Cardiff to Dulles Intl

Round-trip from

Find 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 septiembre 11, 2025.

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 septiembre 11, 2025.

Cheapflights Fare Finder

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

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

Cheapflights Insights

Everything you need to know about your flight from Cardiff to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Cardiff to Washington, D.C. Dulles Intl Airport?

Related info for your journey

Find useful and relevant information for your journey from Cardiff to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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?

What is the cheapest month to book a flight from Cardiff to Washington, D.C. Dulles Intl Airport?

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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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 septiembre 11, 2025.