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.

$878+ 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	$878 (KLM)

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

Search Deals

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 junio 12, 2025.

mar. 7/85:15 pmCWL - IAD

1 stop27h 20mKLM

mar. 7/1512:12 pmIAD - CWL

2 stops16h 03mKLM

Deal found 6/11

$878

mié. 7/99:50 amCWL - IAD

2 stops30h 42mVirgin Atlantic

mié. 7/166:00 amIAD - CWL

2 stops22h 15mVirgin Atlantic

Deal found 6/11

$898

mié. 7/99:50 amCWL - IAD

1 stop10h 45mDelta

dom. 7/138:31 pmIAD - CWL

2 stops15h 14mDelta

Deal found 6/11

$919

jue. 7/109:50 amCWL - IAD

2 stops14h 25mMultiple Airlines

mar. 7/155:25 pmIAD - CWL

1 stop10h 50mMultiple Airlines

Deal found 6/11

$1,001

jue. 7/109:50 amCWL - IAD

1 stop10h 45mAir France

mar. 7/155:25 pmIAD - CWL

1 stop18h 20mAir France

Deal found 6/11

$1,024

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 junio 12, 2025.

mar. 7/85:15 pmCWL - IAD

1 stop27h 20mKLM

mar. 7/1512:12 pmIAD - CWL

2 stops16h 03mKLM

Deal found 6/11

$878

mié. 7/99:50 amCWL - IAD

2 stops30h 42mVirgin Atlantic

mié. 7/166:00 amIAD - CWL

2 stops22h 15mVirgin Atlantic

Deal found 6/11

$898

mié. 7/99:50 amCWL - IAD

1 stop10h 45mDelta

dom. 7/138:31 pmIAD - CWL

2 stops15h 14mDelta

Deal found 6/11

$919

jue. 7/109:50 amCWL - IAD

2 stops14h 25mMultiple Airlines

mar. 7/155:25 pmIAD - CWL

1 stop10h 50mMultiple Airlines

Deal found 6/11

$1,001

jue. 7/109:50 amCWL - IAD

1 stop10h 45mAir France

mar. 7/155:25 pmIAD - CWL

1 stop18h 20mAir France

Deal found 6/11

$1,024

Last-minute flights from Cardiff to Dulles Intl
Discover last-minute flight deals from Cardiff to Dulles Intl. Data last updated junio 12, 2025 and is based on user searches.

dom. 6/2211:00 amCWL - IAD

2 stops29h 45mMultiple Airlines

vie. 6/275:20 pmIAD - CWL

1 stop9h 10mMultiple Airlines

Deal found 6/12

$1,676

dom. 6/2210:00 amCWL - IAD

2 stops17h 11mDelta

vie. 6/278:30 pmIAD - CWL

2 stops15h 35mDelta

Deal found 6/12

$1,817

mar. 7/85:15 pmCWL - IAD

1 stop27h 20mKLM

mié. 7/165:25 pmIAD - CWL

1 stop10h 50mKLM

Deal found 6/11

$878

mié. 7/99:50 amCWL - IAD

2 stops30h 42mVirgin Atlantic

mié. 7/166:00 amIAD - CWL

2 stops22h 15mVirgin Atlantic

Deal found 6/11

$898

mié. 7/99:50 amCWL - IAD

1 stop10h 45mDelta

dom. 7/138:31 pmIAD - CWL

2 stops15h 14mDelta

Deal found 6/11

$919

jue. 7/109:50 amCWL - IAD

2 stops14h 25mMultiple Airlines

mar. 7/155:25 pmIAD - CWL

1 stop10h 50mMultiple Airlines

Deal found 6/11

$1,001

jue. 7/109:50 amCWL - IAD

1 stop10h 45mAir France

mar. 7/155:25 pmIAD - CWL

1 stop18h 20mAir France

Deal found 6/11

$1,024

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

mar. 7/8

5:15 pm-3:35 pm

1 stop27h 20m

Washington, D.C. Dulles Intl

mié. 7/16

1:00 pm-9:15 am

2 stops15h 15m

$878

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

mié. 7/9

9:50 am-11:32 am

2 stops30h 42m

Washington, D.C. Dulles Intl

mié. 7/16

6:00 am-9:15 am

2 stops22h 15m

$898

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

mié. 7/9

9:50 am-3:35 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

dom. 7/13

8:31 pm-4:45 pm

2 stops15h 14m

$919

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

jue. 7/10

9:50 am-7:15 pm

2 stops14h 25m

Washington, D.C. Dulles Intl

mar. 7/15

5:25 pm-9:15 am

1 stop10h 50m

$1,001

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

jue. 7/10

9:50 am-3:35 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

mar. 7/15

5:25 pm-4:45 pm

1 stop18h 20m

$1,024

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 $309). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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.

Rainfall in Dulles Intl by month

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.

Temperature in Dulles Intl by month

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).

Reviews of airlines servicing Dulles Intl

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,950 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,358 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air France

7.5

Good

1,463 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Virgin Atlantic

7.4

Good

652 reviews

Delta

8.0

Very good

7,950 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.
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 $309). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $349). 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.

See more FAQs

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Fairfax

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$878+ 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 7/8. 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

1. Tell us where you want to go

2. Select your favorite providers

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 junio 12, 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 junio 12, 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?

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

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?

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 Cardiff?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Cardiff to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.

100% Free

Book with Flexibility

Travel Smart

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 junio 12, 2025.