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Cheap flights from Washington, D.C. Dulles Intl Airport to Cardiff from £640

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — CWL
5 Feb — 12 Feb1
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 31 January 2025.

Round-trip from

£640

Popular in

June

Cheapest in

March

Average price

£628
KLM
  • KLM
  • 1/3-8/3
  • 2 total stops
  • 38h 35m total
  • Washington, D.C. to Cardiff
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£137 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 31 January 2025.

Fri 7/217:35IAD - CWL
1 stop11h 20mKLM
Mon 10/217:25CWL - IAD
1 stop27h 20mKLM
Deal found 30/1£640
Wed 12/312:15IAD - CWL
2 stops17h 35mVirgin Atlantic
Wed 19/317:25CWL - IAD
1 stop27h 20mVirgin Atlantic
Deal found 31/1£644
Fri 7/217:35IAD - CWL
1 stop11h 20mDelta
Sun 9/210:20CWL - IAD
2 stops37h 36mDelta
Deal found 30/1£648
Fri 7/217:10IAD - CWL
1 stop11h 10mMultiple Airlines
Sun 9/208:20CWL - IAD
1 stop12h 20mMultiple Airlines
Deal found 30/1£767
Sat 1/321:55IAD - CWL
2 stops34h 05mAer Lingus
Sat 8/312:00CWL - IAD
2 stops36h 45mAer Lingus
Deal found 30/1£835

Find flights from Dulles Intl to Cardiff within your budget

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 31 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 1/3

17:35-09:50

1 stop11h 15m

Cardiff Wales

Sat 8/3

17:25-15:45

1 stop27h 20m

£640

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 12/3

12:15-09:50

2 stops17h 35m

Cardiff Wales

Wed 19/3

17:25-16:45

1 stop27h 20m

£644

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 12/3

12:15-09:50

2 stops17h 35m

Cardiff Wales

Wed 19/3

10:20-23:00

2 stops16h 40m

£652

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Sat 1/3

21:55-13:00

2 stops34h 05m

Cardiff Wales

Sat 8/3

12:00-19:45

2 stops36h 45m

£835

Washington, D.C.Cardiff

IAD - CWL

IADCWL

Washington, D.C. Dulles Intl

Wed 23/4

18:10-08:20

3 stops33h 10m

Cardiff Wales

Mon 28/4

13:10-15:20

2 stops31h 10m

£890

Flights are sorted by cheapest return flights first.

Deals found on 30/1

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.

Travel insights for flights from Dulles Intl to Cardiff

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

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.

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 31 January 2025.
Delta
8.0
Very Good
8,454 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

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
8,454 reviews
Delta
8.0
Very Good
8,454 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

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
1,335 reviews
Delta
8.0
Very Good
8,454 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

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
7.5
Good
656 reviews
Delta
8.0
Very Good
8,454 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

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.

Aer Lingus
7.1
Good
1,077 reviews
Delta
8.0
Very Good
8,454 reviews
Check prices

Overall

8.0

Comfort

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Entertainment

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 £640, 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 Virgin Atlantic and Delta - these airlines can fly you to your destination from £644 and £652, respectively. You may be able to fly from Washington, D.C. Dulles Intl Airport to Cardiff for 6% less than the average price by searching for these airlines.

  • 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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