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Cardiff

$598+ Cheap flights from Washington to Cardiff (CWL)

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CWL
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$997
(KLM)

One-way from

$906
(EaseMyTrip)

Popular in

June

Cheapest in

April

Average price

$1,149
Provider with most accurate pricing for Seattle/Tacoma Intl-Cardiff Wales flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Cardiff Wales flights.
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From Washington to Cardiff Wales
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One-way flight from Washington to Cardiff Wales
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Highest demand for flights based on searches. 18% potential increase in price ($260 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($52 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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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 May 1, 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.
Mon 5/122:10 pmSEA - CWL
1 stop35h 05mKLM
Tue 8/199:50 amCWL - SEA
1 stop33h 45mKLM
Deal found 4/28$997
This Air France 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/128:35 amSEA - CWL
2 stops16h 40mMultiple Airlines
Tue 8/199:50 amCWL - SEA
2 stops20h 20mMultiple Airlines
Deal found 4/28$1,150
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 6/131:55 pmSEA - CWL
1 stop19h 10mDelta
Fri 6/209:50 amCWL - SEA
1 stop14h 05mDelta
Deal found 4/29$1,337
This Virgin Atlantic 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/137:50 amSEA - CWL
2 stops17h 20mVirgin Atlantic
Fri 6/209:50 amCWL - SEA
1 stop14h 05mVirgin Atlantic
Deal found 4/29$1,342

Cheapflights Fare Finder

Customize 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 2,558,603 searches. Data last updated May 1, 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

Mon 5/12

2:10 pm-9:15 am

1 stop35h 05m

Cardiff Wales

Tue 8/19

9:50 am-11:35 am

1 stop33h 45m

$997

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 5/12

8:35 am-9:15 am

2 stops16h 40m

Cardiff Wales

Tue 8/19

9:50 am-10:10 pm

2 stops20h 20m

$1,150

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 6/12

5:35 pm-4:45 pm

1 stop15h 10m

Cardiff Wales

Thu 6/19

9:50 am-3:55 pm

1 stop14h 05m

$1,338

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 6/13

7:50 am-9:10 am

2 stops17h 20m

Cardiff Wales

Fri 6/20

9:50 am-3:55 pm

1 stop14h 05m

$1,342

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 9/19

5:40 pm-5:05 pm

1 stop15h 25m

$598

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 6/13

5:35 pm-5:05 pm

1 stop15h 30m

$906

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 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 to Cardiff

What is the cheapest time of day to fly from WA to CWL?

Find hourly flight availability from Washington to Cardiff. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

When flying from State of Washington to Cardiff, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 May 1, 2025.
Delta
8.0
Very good
7,934 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

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
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

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
7,934 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

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
643 reviews
Delta
8.0
Very good
7,934 reviews

Food

7.3

Overall

8.0

Entertainment

7.9

Crew

8.5

Comfort

7.9

Boarding

8.2

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?

    Located just 9.1 mi from the city center, Cardiff Wales (CWL) is the airport most travelers will use when flying to Cardiff from Washington.

  • 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 vacation 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, February is the cheapest month in which you can book a flight from State of Washington to Cardiff (average of $773). Flying from State of Washington 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?

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

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Top 2 airlines flying from Washington to Cardiff

Discover the top 2 airlines that operate flights from Washington 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$742Average$1,214FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$760Average$1,263FlexibilityNo cancel feeOn-time75%

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