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Cheap flights from Cardiff to Washington, D.C. Dulles Intl Airport from £426

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/8. Fares are subject to change and may not be available on all flights or dates of travel.
CWL — IAD
29 Apr — 6 May1
1 adult

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 24 April 2025.

Round-trip from

£773

One-way from

£426
7/6-14/6
  • 7/6-14/6
  • 5 total stops
  • 58h 22m total
  • Cardiff to Washington, D.C.
Search Deals
15/8
  • 15/8
  • 3 total stops
  • 37h 36m total
  • Cardiff to Washington, D.C.
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 24 April 2025.

Sat 7/616:50CWL - IAD
2 stops27h 30mMultiple Airlines
Sat 14/608:18IAD - CWL
3 stops30h 52mMultiple Airlines
Deal found 23/4£773
Sat 7/617:35CWL - IAD
1 stop27h 00mVirgin Atlantic
Sat 14/620:30IAD - CWL
2 stops55h 45mVirgin Atlantic
Deal found 23/4£789
Sat 28/609:45CWL - IAD
2 stops14h 30mAir France
Sat 19/721:20IAD - CWL
2 stops14h 30mAir France
Deal found 23/4£819
Sat 28/609:45CWL - IAD
1 stop10h 50mKLM
Sat 19/717:25IAD - CWL
1 stop10h 50mKLM
Deal found 23/4£828

Cheapflights Fare Finder

Customise 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 858,174 searches. Data last updated 24 April 2025.
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

Cardiff

Fly to

Dulles Intl

Route

Depart

Return

Price

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 7/6

16:50-15:20

2 stops27h 30m

Washington, D.C. Dulles Intl

Sat 14/6

08:18-20:10

3 stops30h 52m

£773

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 7/6

17:35-15:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Sat 14/6

20:30-09:15

2 stops55h 45m

£789

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 28/6

09:45-19:15

2 stops14h 30m

Washington, D.C. Dulles Intl

Sat 19/7

21:20-16:50

2 stops14h 30m

£819

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Sat 28/6

09:45-15:35

1 stop10h 50m

Washington, D.C. Dulles Intl

Sat 19/7

17:25-09:15

1 stop10h 50m

£828

CardiffWashington, D.C.

CWL - IAD

CWLIAD

Cardiff Wales

Fri 15/8

12:25-21:01

3 stops37h 36m

£426

Flights are sorted by cheapest return flights first.

Deals found on 23/4

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 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 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, January is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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 24 April 2025.
KLM
7.8
Good
1,333 reviews
Check prices

Entertainment

7.1

Food

7.2

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,333 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Entertainment

7.1

Food

7.2

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Air France
7.4
Good
1,442 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Entertainment

7.1

Food

7.2

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Virgin Atlantic
7.4
Good
642 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Entertainment

7.1

Food

7.2

Boarding

7.8

Crew

8.4

Comfort

7.7

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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?

    For a flight from Cardiff to Washington, D.C. Dulles Intl, you will be flying from 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 outbound flights to Washington, D.C. Dulles Intl per day. 0 airlines have flights to Washington, D.C. Dulles Intl from Cardiff Wales on a regular basis.

  • 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 holiday 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, January is the cheapest month in which you can book a flight from Cardiff to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Cardiff to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). 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 Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
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Arlington
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Can Cheapflights find flights from Cardiff to Dulles Intl with no change fees?

Need flexible booking options for your flight to Dulles Intl from Cardiff? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Cardiff to Dulles Intl become cheaper?

Not ready to book yet? You can track prices for flights from Cardiff to Dulles Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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