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Dulles Intl

$749+ 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 3/12. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — IAD
feb. 4 — feb. 111
mar. 2/4
mar. 2/11
1 adult, Economy
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Cheap flight deals from Cardiff to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Cardiff (CWL) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$749
(Mytrip)
Provider with most accurate pricing for Cardiff Wales-Washington, D.C. Dulles Intl flight deals.
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Provider most trusted by Cheapflights users for Cardiff Wales-Washington, D.C. Dulles Intl flights.
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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 enero 30, 2025.

This Mytrip deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/124:05 pmCWL - IAD
3 stops31h 20mMultiple Airlines
dom. 3/238:40 pmIAD - CWL
2 stops12h 10mMultiple Airlines
Deal found 1/30$749
This TravelUp deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/1210:20 amCWL - IAD
2 stops16h 40mKLM
dom. 3/236:35 pmIAD - CWL
1 stop18h 20mKLM
Deal found 1/30$902
This Voliamo deal was found by Cheapflights users on 1/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Voliamo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/285:35 pmCWL - IAD
1 stop27h 00mAir France
sáb. 7/195:25 pmIAD - CWL
1 stop18h 25mAir France
Deal found 1/30$1,099
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/309:50 amCWL - IAD
1 stop10h 45mDelta
vie. 5/28:33 pmIAD - CWL
2 stops15h 32mDelta
Deal found 1/29$1,584
This Gotogate deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/309:50 amCWL - IAD
1 stop10h 45mVirgin Atlantic
vie. 5/25:25 pmIAD - CWL
1 stop10h 45mVirgin Atlantic
Deal found 1/29$1,944

Find flights from Cardiff to Dulles Intl within your budget

Customize your flight search to find flights from Cardiff to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 30, 2025.

Fly from

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Fly to

Any airport

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

mié. 3/12

4:05 pm-7:25 pm

3 stops31h 20m

Washington, D.C. Dulles Intl

dom. 3/23

8:40 pm-12:50 pm

2 stops12h 10m

$749

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

mié. 3/12

10:20 am-11:00 pm

2 stops16h 40m

Washington, D.C. Dulles Intl

dom. 3/23

6:35 pm-4:55 pm

1 stop18h 20m

$902

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

sáb. 6/28

5:35 pm-3:35 pm

1 stop27h 00m

Washington, D.C. Dulles Intl

sáb. 7/19

5:25 pm-4:50 pm

1 stop18h 25m

$1,099

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

mié. 4/30

9:50 am-3:35 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

vie. 5/2

8:33 pm-5:05 pm

2 stops15h 32m

$1,584

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

mié. 4/30

9:50 am-3:35 pm

1 stop10h 45m

Washington, D.C. Dulles Intl

vie. 5/2

5:25 pm-9:10 am

1 stop10h 45m

$1,944

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Compare providers for flights from Cardiff to Dulles Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Cardiff to Dulles Intl in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Cardiff-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Cardiff-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Cardiff-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Cardiff-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Cardiff-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Cardiff to Dulles Intl

Get recent, data-driven insights about flights from Cardiff to Dulles Intl including ideal travel times, pricing trends, and more.

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 June is currently the most expensive (average of $389). 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

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

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

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated enero 30, 2025.
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,454 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,335 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.5
Good
657 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France
7.4
Good
1,475 reviews
Delta
8.0
Very good
8,454 reviews

Boarding

8.2

Entertainment

7.9

Food

7.3

Crew

8.5

Overall

8.0

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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?

    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 June is currently the most expensive (average of $389). 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

Traveling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Fairfax
Arlington
Alexandria
Springfield
Silver Spring
Rockville
Tysons
Gaithersburg
Fredericksburg
Linthicum Heights
Laurel
Falls Church
Sterling
Easton
Oxon Hill
Herndon
Woodbridge
Bowie
Reston
National Harbor

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Alternative routes for Cardiff to Dulles Intl

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