How long is the flight from State of Washington to Cardiff?

Departing from State of Washington to Cardiff will take you 17h 45m. State of Washington and Cardiff are separated by a distance of 4709 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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.

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).

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.

$759+ Flights from Washington to Cardiff

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Cheap 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 December 9, 2025.

Thu 12/113:05 pmSEA - CWL

1 stop34h 45mKLM

Sat 12/135:25 pmCWL - SEA

1 stop26h 25mKLM

Deal found 12/7

$1,402

Thu 12/112:00 pmSEA - CWL

2 stops21h 15mMultiple Airlines

Sat 12/138:05 pmCWL - SEA

3 stops34h 41mMultiple Airlines

Deal found 12/7

$2,600

Best flights from Washington to Cardiff
Discover carefully curated flight deals from Washington to Cardiff that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 9, 2025.

Wed 1/213:10 pmSEA - CWL

1 stop17h 45mKLM

Wed 1/2810:20 amCWL - SEA

1 stop33h 30mKLM

Deal found 12/6

$759

Thu 1/226:05 amSEA - CWL

2 stops19h 45mDelta

Thu 1/2910:20 amCWL - SEA

2 stops19h 29mDelta

Deal found 12/8

$773

Thu 1/223:10 pmSEA - CWL

1 stop34h 40mKLM

Thu 1/295:25 pmCWL - SEA

1 stop26h 25mKLM

Deal found 12/8

$759

Wed 1/217:40 amSEA - CWL

2 stops18h 10mDelta

Wed 1/2810:20 amCWL - SEA

2 stops19h 29mDelta

Deal found 12/6

$773

Sun 4/195:35 pmSEA - CWL

1 stop15h 10mDelta

Thu 4/309:45 amCWL - SEA

1 stop33h 50mDelta

Deal found 12/7

$914

Mon 4/202:05 pmSEA - CWL

1 stop18h 40mDelta

Thu 4/309:45 amCWL - SEA

1 stop14h 05mDelta

Deal found 12/7

$914

Sun 4/195:35 pmSEA - CWL

1 stop15h 10mDelta

Mon 5/49:45 amCWL - SEA

1 stop33h 50mDelta

Deal found 12/7

$914

Sun 4/196:05 amSEA - CWL

2 stops19h 10mDelta

Fri 5/19:45 amCWL - SEA

1 stop14h 05mDelta

Deal found 12/7

$919

Mon 4/207:20 amSEA - CWL

2 stops25h 25mDelta

Mon 5/49:45 amCWL - SEA

1 stop33h 50mDelta

Deal found 12/7

$919

Last-minute flights from Washington to Cardiff
Discover last-minute flight deals from Washington to Cardiff. Data last updated December 9, 2025 and is based on user searches.

Thu 12/113:05 pmSEA - CWL

1 stop34h 45mKLM

Sat 12/135:25 pmCWL - SEA

1 stop26h 25mKLM

Deal found 12/7

$1,402

Thu 12/112:00 pmSEA - CWL

2 stops21h 15mMultiple Airlines

Sat 12/138:05 pmCWL - SEA

3 stops34h 41mMultiple Airlines

Deal found 12/7

$2,600

Wed 1/213:10 pmSEA - CWL

1 stop17h 45mKLM

Wed 1/2810:20 amCWL - SEA

1 stop33h 30mKLM

Deal found 12/6

$759

Wed 1/217:40 amSEA - CWL

2 stops18h 10mDelta

Wed 1/2810:20 amCWL - SEA

2 stops19h 29mDelta

Deal found 12/6

$773

Wed 1/212:35 pmSEA - CWL

3 stops33h 30mMultiple Airlines

Wed 1/283:55 pmCWL - SEA

2 stops31h 45mMultiple Airlines

Deal found 12/6

$1,661

Thu 1/222:35 pmSEA - CWL

2 stops23h 25mMultiple Airlines

Thu 1/2910:30 amCWL - SEA

3 stops43h 46mMultiple Airlines

Deal found 12/8

$1,334

Find flight deals from Washington to Cardiff

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 1 star
Round-trip from	$759 (KLM)

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

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 1/21

3:10 pm-4:55 pm

1 stop17h 45m

Cardiff Wales

Wed 1/28

10:20 am-11:50 am

1 stop33h 30m

$759

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 1/22

3:10 pm-9:50 am

1 stop34h 40m

Cardiff Wales

Thu 1/29

5:25 pm-11:50 am

1 stop26h 25m

$759

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Thu 1/22

6:05 am-9:50 am

2 stops19h 45m

Cardiff Wales

Thu 1/29

10:20 am-9:49 pm

2 stops19h 29m

$773

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 1/21

7:40 am-9:50 am

2 stops18h 10m

Cardiff Wales

Wed 1/28

10:20 am-9:49 pm

2 stops19h 29m

$773

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 4/19

5:35 pm-4:45 pm

1 stop15h 10m

Cardiff Wales

Thu 4/30

9:45 am-11:35 am

1 stop33h 50m

$914

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 4/20

2:05 pm-4:45 pm

1 stop18h 40m

Cardiff Wales

Thu 4/30

9:45 am-3:50 pm

1 stop14h 05m

$914

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 4/19

5:35 pm-4:45 pm

1 stop15h 10m

Cardiff Wales

Mon 5/4

9:45 am-11:35 am

1 stop33h 50m

$914

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 4/19

6:05 am-9:15 am

2 stops19h 10m

Cardiff Wales

Fri 5/1

9:45 am-3:50 pm

1 stop14h 05m

$919

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 4/20

7:20 am-4:45 pm

2 stops25h 25m

Cardiff Wales

Mon 5/4

9:45 am-11:35 am

1 stop33h 50m

$919

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

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?

One of the essential ways to save on airfare from State of Washington to Cardiff is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 42% on airfare.

Related info for your journey

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.
How long is the flight from State of Washington to Cardiff?
Departing from State of Washington to Cardiff will take you 17h 45m. State of Washington and Cardiff are separated by a distance of 4709 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
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.

See more FAQs

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$759+ Cheap flights from Washington to Cardiff (CWL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington to Cardiff with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Washington to Cardiff

Cheapest flights from Washington to CardiffExplore 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 December 9, 2025.

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 December 9, 2025.

Find flight deals from Washington to Cardiff

Keep the following information in mind while searching for Washington to Cardiff flight deals. Data was last updated December 9, 2025.

Most accurate provider

Most trusted provider

Round-trip from

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Use the filters below to find and compare flights from Washington to Cardiff that are best for you.

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.

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 December 9, 2025.

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?

How long is the flight from State of Washington to Cardiff?

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

How can I find direct flights from Washington to Cardiff?

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

Traveling to a place near Cardiff?

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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 December 9, 2025.