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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £606

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
5 May — 12 May1
1 adult

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 30 April 2025.

Round-trip from

£606

Popular in

May

Cheapest in

November

Average price

£580
KLM
  • KLM
  • 20/8-27/8
  • 2 total stops
  • 21h 35m total
  • Washington, D.C. to Cardiff
Search Deals
Highest demand for flights based on searches. 26% potential increase in price (£202 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (£47 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 30 April 2025.

Wed 20/817:25IAD - CWL
1 stop10h 50mKLM
Wed 27/809:50CWL - IAD
1 stop10h 45mKLM
Deal found 29/4£606
Wed 20/809:30IAD - CWL
2 stops18h 45mDelta
Wed 27/809:50CWL - IAD
1 stop10h 45mDelta
Deal found 29/4£610
Thu 12/617:20IAD - CWL
1 stop13h 40mMultiple Airlines
Thu 19/607:55CWL - IAD
1 stop12h 55mMultiple Airlines
Deal found 28/4£782
Fri 29/821:20IAD - CWL
2 stops14h 45mAir France
Sun 7/909:50CWL - IAD
2 stops14h 25mAir France
Deal found 29/4£879
Thu 12/610:07IAD - CWL
2 stops18h 08mVirgin Atlantic
Thu 19/609:50CWL - IAD
1 stop10h 45mVirgin Atlantic
Deal found 28/4£942

Cheapflights Fare Finder

Customise 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 858,174 searches. Data last updated 30 April 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 20/8

17:25-09:15

1 stop10h 50m

Cardiff Wales

Wed 27/8

09:50-15:35

1 stop10h 45m

£606

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 20/8

09:30-09:15

2 stops18h 45m

Cardiff Wales

Wed 27/8

09:50-15:35

1 stop10h 45m

£610

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 12/6

17:20-12:00

1 stop13h 40m

Cardiff Wales

Thu 19/6

07:55-15:50

1 stop12h 55m

£782

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Fri 29/8

21:20-17:05

2 stops14h 45m

Cardiff Wales

Sun 7/9

09:50-19:15

2 stops14h 25m

£879

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Thu 12/6

10:07-09:15

2 stops18h 08m

Cardiff Wales

Thu 19/6

09:50-15:35

1 stop10h 45m

£942

Flights are sorted by cheapest return flights first.

Deals found on 29/4

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 return 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 50.0 - 90.0 inches per month. January is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Cardiff when rainfall is around 50.0 mm.

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 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

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 30 April 2025.
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

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
7,936 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

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
7,936 reviews
Check prices

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

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.
Air France
7.4
Good
1,446 reviews
Delta
8.0
Very Good
7,936 reviews
Check prices

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

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
7,936 reviews
Check prices

Overall

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Comfort

7.9

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?

    Located just 9.1 mi from the city center, Cardiff Wales is the airport most travelers will use when flying to Cardiff from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Cardiff Wales (CWL) should be relatively easy as there are 0 daily inbound flights from Washington, D.C. Dulles Intl from 0 different airlines.

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

    Currently priced at £606, KLM will fly you from Washington, D.C. Dulles Intl Airport to Cardiff and back. In addition to KLM, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Air France - these airlines can fly you to your destination from £610 and £879, respectively.

  • 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 holiday 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, July is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Cardiff (average of £169). Flying from Washington, D.C. Dulles Intl Airport to Cardiff in December is currently the most expensive (average of £263). 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

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

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Barry
Bridgend

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