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Cheap flights from Washington to Cardiff from £363

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 16/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CWL
7 Apr — 14 Apr1
1 adult

Cheap flight deals from Washington to Cardiff

Keep the following information in mind while searching for Washington to Cardiff flight deals. Data was last updated 2 April 2025.

Round-trip from

£748

One-way from

£363

Popular in

June

Cheapest in

April

Average price

£649
Delta
  • Delta
  • 16/5-23/5
  • 3 total stops
  • 32h 01m total
  • Washington to Cardiff
Search Deals
16/5
  • 16/5
  • 3 total stops
  • 31h 35m total
  • Washington to Cardiff
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£169 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£38 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Washington to Cardiff

Cheapest flights from Washington to Cardiff
Explore the most affordable flight options available from Washington to Cardiff. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 April 2025.

Thu 30/1009:55SEA - CWL
2 stops24h 00mDelta
Tue 4/1110:20CWL - SEA
2 stops20h 05mDelta
Deal found 1/4£710
Thu 30/1015:05SEA - CWL
1 stop18h 50mKLM
Tue 4/1117:25CWL - SEA
1 stop26h 25mKLM
Deal found 1/4£728
Fri 16/519:00SEA - CWL
3 stops32h 30mMultiple Airlines
Fri 23/522:30CWL - SEA
3 stops31h 43mMultiple Airlines
Deal found 31/3£1,047

Cheapflights Fare Finder

Customise your flight search to find flights from Washington 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 2 April 2025.
Use the filters below to find and compare flights from Washington to Cardiff that are best for you.

Fly from

Washington

Fly to

Cardiff

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 16/5

07:16-09:10

2 stops17h 54m

Cardiff Wales

Fri 23/5

09:50-15:57

1 stop14h 07m

£748

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 16/5

18:07-09:15

1 stop31h 08m

Cardiff Wales

Fri 23/5

09:50-15:57

1 stop14h 07m

£949

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 16/5

19:00-11:30

3 stops32h 30m

Cardiff Wales

Fri 23/5

22:30-22:13

3 stops31h 43m

£1,047

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 16/5

19:00-10:35

3 stops31h 35m

£363

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 16/5

18:07-09:15

1 stop31h 08m

£514

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Best time to book a flight from Washington to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Washington 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 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 2 April 2025.
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

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
7,899 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

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
1,323 reviews
Delta
8.0
Very Good
7,899 reviews
Check prices

Boarding

8.2

Comfort

8.0

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

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 Washington 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?

    Cardiff Wales (CWL), located 9.1 mi from the city center, is the airport you fly into when you book flights from Washington to Cardiff.

  • Can I find deals for flights from Washington to Cardiff that include hotel bookings?

    Yes. In addition to deals on Washington to Cardiff flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington to Cardiff?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Cardiff.

  • Can I find deals for business class flights from Washington to Cardiff?

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Cardiff?

    Currently, July is the cheapest month in which you can book a flight from State of Washington to Cardiff (average of £169). Flying from State of Washington 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?

Book flights to Washington if you plan to visit one of these locations
Barry
Bridgend

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