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

Departing from State of Washington to Cardiff will take you 17h 50m. 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 is the cheapest time of day to fly from WA to CWL?

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.

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.

$1,011+ 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 January 29, 2026.

Fri 2/63:05 pm

SEA

CWL

1 stop17h 50m

KLM

Tue 2/105:25 pm

CWL

SEA

1 stop26h 15m

KLM

Deal found 1/27

$1,011

Fri 2/67:10 am

SEA

CWL

2 stops18h 40m

Delta

Tue 2/1010:20 am

CWL

SEA

2 stops20h 05m

Delta

Deal found 1/27

$1,026

Fri 3/134:05 pm

SEA

CWL

1 stop17h 50m

Multiple Airlines

Fri 3/205:15 pm

CWL

SEA

2 stops28h 54m

Multiple Airlines

Deal found 1/27

$1,030

Tue 6/237:05 am

SEA

CWL

2 stops43h 10m

WestJet

Tue 6/3011:35 am

CWL

SEA

2 stops40h 53m

WestJet

Deal found 1/28

$1,153

Fri 3/134:05 pm

SEA

CWL

1 stop17h 50m

KLM

Fri 3/205:15 pm

CWL

SEA

1 stop26h 20m

KLM

Deal found 1/27

$1,160

Tue 6/235:35 pm

SEA

CWL

1 stop15h 10m

Multiple Airlines

Tue 6/309:45 am

CWL

SEA

2 stops20h 20m

Multiple Airlines

Deal found 1/27

$1,382

Tue 6/235:35 pm

SEA

CWL

1 stop15h 10m

KLM

Tue 6/305:15 pm

CWL

SEA

1 stop31h 05m

KLM

Deal found 1/27

$1,490

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 January 29, 2026.

Fri 3/134:05 pm

SEA

CWL

1 stop17h 50m

Multiple Airlines

Fri 3/205:15 pm

CWL

SEA

2 stops28h 54m

Multiple Airlines

Deal found 1/27

$1,030

Tue 6/237:05 am

SEA

CWL

2 stops43h 10m

WestJet

Tue 6/3011:35 am

CWL

SEA

2 stops39h 03m

WestJet

Deal found 1/27

$1,153

Fri 3/134:05 pm

SEA

CWL

1 stop17h 50m

KLM

Fri 3/205:15 pm

CWL

SEA

1 stop26h 20m

KLM

Deal found 1/27

$1,160

Tue 6/235:35 pm

SEA

CWL

1 stop15h 10m

Multiple Airlines

Tue 6/309:45 am

CWL

SEA

2 stops20h 20m

Multiple Airlines

Deal found 1/27

$1,382

Tue 6/235:35 pm

SEA

CWL

1 stop15h 10m

KLM

Tue 6/305:15 pm

CWL

SEA

1 stop31h 05m

KLM

Deal found 1/27

$1,490

Last-minute flights from Washington to Cardiff
Discover last-minute flight deals from Washington to Cardiff. Data last updated January 29, 2026 and is based on user searches.

Fri 2/63:05 pm

SEA

CWL

1 stop17h 50m

KLM

Tue 2/105:25 pm

CWL

SEA

1 stop26h 15m

KLM

Deal found 1/27

$1,011

Fri 2/67:10 am

SEA

CWL

2 stops18h 40m

Delta

Tue 2/1010:20 am

CWL

SEA

2 stops20h 05m

Delta

Deal found 1/27

$1,026

Find flight deals from Washington to Cardiff

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$1,030 (Expedia)

Provider with most accurate pricing for Seattle/Tacoma Intl-Cardiff Wales flight deals.

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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

Fri 3/13

4:05 pm-4:55 pm

1 stop17h 50m

Cardiff Wales

Fri 3/20

5:15 pm-3:09 pm

2 stops28h 54m

$1,030

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 6/23

7:05 am-10:15 am

2 stops43h 10m

Cardiff Wales

Tue 6/30

11:35 am-6:38 pm

2 stops39h 03m

$1,153

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Fri 3/13

4:05 pm-4:55 pm

1 stop17h 50m

Cardiff Wales

Fri 3/20

5:15 pm-12:35 pm

1 stop26h 20m

$1,160

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 6/23

5:35 pm-4:45 pm

1 stop15h 10m

Cardiff Wales

Tue 6/30

9:45 am-10:05 pm

2 stops20h 20m

$1,382

SeattleCardiff

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 6/23

5:35 pm-4:45 pm

1 stop15h 10m

Cardiff Wales

Tue 6/30

5:15 pm-4:20 pm

1 stop31h 05m

$1,490

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

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

No data available for this route at this time. Please check back soon.

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 50m. 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.

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$1,011+ 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 2/6. 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 January 29, 2026.

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 January 29, 2026.

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 January 29, 2026.

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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

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 January 29, 2026.