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Cheap flights from Seattle (SEA) to Cardiff (CWL) from $1,045

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 6/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
SEA — CWL
Apr 21 — Apr 281
From?
To?
Sun 4/21
Sun 4/28
1 adult, Economy
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Cheap flight deals from Seattle to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Cardiff (CWL). 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 April 16, 2024.

Round-trip from

$708
From Seattle/Tacoma Intl to Cardiff Wales
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What is the cheapest day to fly round-trip from Seattle to Cardiff?

Users have found that flying from Seattle to Cardiff on a Friday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

When is the cheapest time to fly from Seattle to Cardiff (SEA - CWL)?

When flying from Seattle to Cardiff, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 24% versus a flight in the afternoon.

Cheap KLM flights from Seattle to Cardiff

Explore cheap flight options specifically provided by KLM for the route between Seattle and Cardiff. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Sat 6/157:50 amSEA - CWL
2 stops17h 25mKLM
Fri 9/139:45 amCWL - SEA
2 stops20h 11mKLM
Deal found 4/14$1,045
Sat 6/157:50 amSEA - CWL
2 stops17h 25mKLM
Fri 9/139:45 amCWL - SEA
2 stops20h 11mKLM
Deal found 4/15$1,050
Sat 6/157:50 amSEA - CWL
2 stops17h 25mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 4/14$1,085
Sat 6/157:50 amSEA - CWL
2 stops17h 25mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 4/15$1,090
Sat 6/151:30 pmSEA - CWL
1 stop19h 15mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 4/15$1,422

Seattle to Cardiff 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Cardiff in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,165,818 searches. Data last updated April 16, 2024.
Sat 6/157:50 amSEA - CWL
2 stops17h 25mKLM
Fri 9/139:45 amCWL - SEA
2 stops20h 11mKLM
Deal found 4/15$1,050
Sat 6/157:50 amSEA - CWL
2 stops17h 25mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 4/15$1,090
Mon 7/151:30 pmSEA - CWL
1 stop19h 15mKLM
Tue 7/235:15 pmCWL - SEA
1 stop25h 00mKLM
Deal found 4/15$1,132
Mon 7/157:10 amSEA - CWL
2 stops18h 05mKLM
Tue 7/235:15 pmCWL - SEA
1 stop25h 00mKLM
Deal found 4/15$1,137
Fri 6/71:30 pmSEA - CWL
1 stop19h 15mKLM
Sun 6/169:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 4/15$1,350
Fri 6/77:50 amSEA - CWL
2 stops17h 25mKLM
Sun 6/169:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 4/15$1,355
Fri 6/77:50 amSEA - CWL
2 stops17h 25mKLM
Sun 6/169:45 amCWL - SEA
2 stops18h 52mKLM
Deal found 4/15$1,365
Sat 6/151:30 pmSEA - CWL
1 stop19h 15mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 4/15$1,422
Mon 7/157:40 pmSEA - CWL
2 stops31h 50mBritish Airways
Tue 7/2312:00 pmCWL - SEA
2 stops31h 35mBritish Airways
Deal found 4/15$1,541

Find flights from Seattle to Cardiff within your budget

Customize your flight search to find flights from Seattle 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 3,165,818 searches. Data last updated April 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,045 - $1,422

Route

Depart

Return

Price

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 6/15

2 stops17h 25m

Cardiff Wales

Fri 9/13

2 stops20h 11m

$1,045

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 6/15

2 stops17h 25m

Cardiff Wales

Fri 9/13

2 stops20h 11m

$1,050

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 6/15

2 stops17h 25m

Cardiff Wales

Fri 9/13

1 stop25h 10m

$1,085

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 6/15

2 stops17h 25m

Cardiff Wales

Fri 9/13

1 stop25h 10m

$1,090

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 6/15

1 stop14h 40m

Cardiff Wales

Fri 9/13

1 stop25h 10m

$1,280

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 6/15

1 stop19h 15m

Cardiff Wales

Fri 9/13

1 stop25h 10m

$1,422

Flights are sorted by cheapest first

Deals found on 4/14

When is the cheapest time to fly from Seattle to Cardiff?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Cardiff. Price data was last updated on April 14, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Cardiff flight should consider departing on Sunday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to Cardiff by month

Plan your trip from Seattle to Cardiff by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Cardiff is currently $0 while a round-trip flight costs $1,162. Price data was last updated on April 7, 2024.

Currently, January is the cheapest month in which you can book a flight from Seattle to Cardiff (average of $708). Flying from Seattle to Cardiff in June is currently the most expensive (average of $1,496). 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.

January

$708

February

$726

March

$897

April

$819

May

$946

June

$1,496

July

$1,274

August

$996

September

$898

October

$825

November

$924

December

$816

Temperature and rainfall in Cardiff by month

Plan your trip to Cardiff by taking into account the average temperature and rainfall totals by month.

CWL

Temperature

39.2 - 64.4 °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 April 16, 2024.
KLM
7.9
Good
1,647 reviews
Check prices

Crew

8.4

Overall

7.9

Boarding

7.8

Food

7.3

Comfort

7.6

Entertainment

7.3

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

KLM
7.9
Good
1,647 reviews
KLM
7.9
Good
1,647 reviews
Check prices

Crew

8.4

Overall

7.9

Boarding

7.8

Food

7.3

Comfort

7.6

Entertainment

7.3

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

Air France
7.6
Good
1,837 reviews
KLM
7.9
Good
1,647 reviews
Check prices

Crew

8.4

Overall

7.9

Boarding

7.8

Food

7.3

Comfort

7.6

Entertainment

7.3

Reviews

1 / 10

Departure was late. Plane much too small for an 11 hour flight. One bathroom was out of order in a completely full flight.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Cardiff. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find flights from Seattle to Cardiff for under $1,100 on Cheapflights?

    Yes, there are multiple flights from Seattle to Cardiff for under $1,100. The cheapest flight booked recently is on KLM for just $1,045, but on average you can expect to pay $1,162.

  • What are the cheapest airlines flying from Seattle to Cardiff round-trip?

    Cheapflights users have booked flights from Seattle to Cardiff round-trip from $1,045. Another airline that can offer you cheap pricing is Air France.

  • What does SEA to CWL mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to Cardiff Wales Airport flight would often be abbreviated as a SEA to CWL flight.

  • Can I find deals for flights from Seattle to Cardiff that include extra baggage allowance?

    The amount of baggage you can bring depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to Cardiff with specific airlines?

    Yes, Cheapflights allows you to browse and filter flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to see available direct flights.

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

    Yes. Cheapflights offers flight deals from Seattle 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.

  • Can I find deals for flights from Seattle to Cardiff that allow pets onboard?

    Many airlines do offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to Cardiff?

    Yes, you can often find last-minute deals on Seattle to Cardiff flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Seattle to Cardiff flight deals updated?

    The Seattle to Cardiff flight deals you see on this page were last updated on 4/15.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Complete your trip
Complete your trip to Cardiff by adding a car rental and/or hotel reservation to your travel itinerary.

Cardiff car rentals
Cardiff Wales Airport car rentals
Bristol Airport car rentals
Swansea car rentals

Top 2 airlines flying from Seattle to Cardiff

Discover the top 2 airlines that operate flights from Seattle 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 3,165,818 searches. Data last updated April 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$698Average$944FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest$767Average$1,042FlexibilityNo cancel feeOn-timeN/A
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Search flights from Seattle to Cardiff by cabin class

Find flights from Seattle to Cardiff, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Cardiff?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Cardiff from Seattle today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Seattle to Cardiff?

Millions of users choose and trust Cheapflights to book the best flight deals from Seattle to Cardiff for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Seattle to Cardiff with no change fees?

Yes! Cheapflights helps users easily find flights from Seattle to Cardiff with no change fees.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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