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Cardiff

$813+ Cheap flights from Dulles Intl (IAD) to Cardiff (CWL)

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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Cheap flight deals from Dulles Intl to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Cardiff (CWL). 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 April 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$847
(Mytrip)

Popular in

May

Cheapest in

November

Average price

$778
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Cardiff Wales flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Cardiff Wales flights.
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From Washington, D.C. Dulles Intl to Cardiff Wales
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($364 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($82 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Dulles Intl to Cardiff

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 April 29, 2025.

This KLM deal was found by Cheapflights users on 4/28. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/305:25 pmIAD - CWL
1 stop10h 50mKLM
Wed 5/79:50 amCWL - IAD
1 stop10h 45mKLM
Deal found 4/28$813
This Mytrip deal was found by Cheapflights users on 4/28. 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.
Mon 5/262:25 pmIAD - CWL
2 stops20h 30mMultiple Airlines
Mon 6/21:10 pmCWL - IAD
2 stops29h 20mMultiple Airlines
Deal found 4/28$847
This Delta deal was found by Cheapflights users on 4/29. 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.
Fri 8/298:30 pmIAD - CWL
2 stops15h 35mDelta
Sun 9/79:50 amCWL - IAD
1 stop10h 45mDelta
Deal found 4/29$943
This Air France deal was found by Cheapflights users on 4/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/299:20 pmIAD - CWL
2 stops14h 45mAir France
Sun 9/79:50 amCWL - IAD
2 stops14h 25mAir France
Deal found 4/29$1,179
This Virgin Atlantic deal was found by Cheapflights users on 4/28. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1210:07 amIAD - CWL
2 stops18h 08mVirgin Atlantic
Thu 6/199:50 amCWL - IAD
1 stop10h 45mVirgin Atlantic
Deal found 4/28$1,263

Cheapflights Fare Finder

Customize your flight search to find flights from Dulles Intl to Cardiff 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 April 29, 2025.
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

Dulles Intl

Fly to

Cardiff

Route

Depart

Return

Price

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 8/20

5:25 pm-9:15 am

1 stop10h 50m

Cardiff Wales

Wed 8/27

9:50 am-3:35 pm

1 stop10h 45m

$813

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 8/20

1:00 pm-9:15 am

2 stops15h 15m

Cardiff Wales

Wed 8/27

9:50 am-3:35 pm

1 stop10h 45m

$818

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Mon 5/26

2:25 pm-3:55 pm

2 stops20h 30m

Cardiff Wales

Mon 6/2

1:10 pm-1:30 pm

2 stops29h 20m

$847

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 8/29

9:20 pm-5:05 pm

2 stops14h 45m

Cardiff Wales

Sun 9/7

9:50 am-7:15 pm

2 stops14h 25m

$1,179

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 6/12

10:07 am-9:15 am

2 stops18h 08m

Cardiff Wales

Thu 6/19

9:50 am-3:35 pm

1 stop10h 45m

$1,263

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Compare providers for flights from Dulles Intl to Cardiff

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 Dulles Intl to Cardiff in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice 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 Washington, D.C. Dulles Intl Airport-Cardiff flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Cardiff flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Cardiff flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Cardiff flights, Cheapflights users trust eDreams the most. eDreams 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 Washington, D.C. Dulles Intl Airport-Cardiff 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 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.
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 Washington, D.C. Dulles Intl Airport to Cardiff

Rainfall in Cardiff by month

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

In terms of precipitation, rainfall in Cardiff ranges from 2.0 - 3.5 inches per month. January is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Cardiff when rainfall is around 2.0 in.

Temperature in Cardiff by month

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

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 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Cardiff

Get insights into the airlines that provide service to Cardiff. 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 Cardiff. Reviews last updated April 29, 2025.
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Cardiff. 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 into for flights to Cardiff from Washington, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to Cardiff, you will be flying into Cardiff Wales. Cardiff Wales (CWL) is just 9.1 mi from the center of the city. Cardiff Wales is the only Cardiff airport and it handles 0 inbound flights from Washington, D.C. Dulles Intl per day. 1 airline has flights to Cardiff Wales from Washington, D.C. Dulles Intl on a regular basis.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Cardiff round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Cardiff is KLM. Our recent data shows that you can find tickets from as low as $1,188 on this airline. Additional options worth looking into are Virgin Atlantic and Delta, starting at $1,263 and $1,273 round-trip.

  • 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 vacation 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.

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

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Cardiff (average of $773). Flying from Washington, D.C. Dulles Intl Airport to Cardiff in June is currently the most expensive (average of $1,622). 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 Washington, D.C. Dulles Intl Airport?

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Top airline flying from Dulles Intl to Cardiff

Discover the top airline that operate flights from Dulles Intl to Cardiff. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$713Average$790FlexibilityNo cancel feeOn-time75%

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