Cheap flights from Seattle (SEA) to Cardiff (CWL) from $497

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 6/28. 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
feb. 27 — mar. 51

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 febrero 22, 2024.

Round-trip from

$708
From Seattle/Tacoma Intl to Cardiff Wales

What is the cheapest day to fly round-trip from Seattle to Cardiff?

Users have found that flying from Seattle to Cardiff on a Thursday 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 at noon, which can drop the price by up to 18% versus a flight in the morning.

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 3,442,422 searches. Data last updated febrero 22, 2024.
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/25:15 pmCWL - SEA
1 stop25h 05mKLM
Deal found 2/21$1,024
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops41h 09mKLM
Deal found 2/21$1,034
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/25:15 pmCWL - SEA
1 stop31h 25mKLM
Deal found 2/20$1,064
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops36h 33mKLM
Deal found 2/20$1,074
vie. 3/296:10 amSEA - CWL
2 stops27h 45mKLM
mar. 4/25:15 pmCWL - SEA
2 stops30h 48mKLM
Deal found 2/21$1,078
vie. 3/296:10 amSEA - CWL
2 stops20h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops32h 38mKLM
Deal found 2/20$1,128

Cheap Seattle to Cardiff flights in February & March 2024

Find cheap flight options from Seattle to Cardiff specifically for the months of February and March 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,442,422 searches. Prices were last updated on febrero 22, 2024.
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/25:15 pmCWL - SEA
1 stop25h 05mKLM
Deal found 2/21$1,024
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops41h 09mKLM
Deal found 2/21$1,034
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/25:15 pmCWL - SEA
1 stop31h 25mKLM
Deal found 2/20$1,064
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops36h 33mKLM
Deal found 2/20$1,074
vie. 3/296:10 amSEA - CWL
2 stops27h 45mKLM
mar. 4/25:15 pmCWL - SEA
2 stops30h 48mKLM
Deal found 2/21$1,078
vie. 3/296:10 amSEA - CWL
2 stops20h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops32h 38mKLM
Deal found 2/20$1,128

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 3,442,422 searches. Data last updated febrero 22, 2024.
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/25:15 pmCWL - SEA
1 stop25h 05mKLM
Deal found 2/21$1,024
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops41h 09mKLM
Deal found 2/21$1,034
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/25:15 pmCWL - SEA
1 stop31h 25mKLM
Deal found 2/20$1,064
vie. 3/293:20 pmSEA - CWL
1 stop18h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops36h 33mKLM
Deal found 2/20$1,074
vie. 3/296:10 amSEA - CWL
2 stops27h 45mKLM
mar. 4/25:15 pmCWL - SEA
2 stops30h 48mKLM
Deal found 2/21$1,078
vie. 3/296:10 amSEA - CWL
2 stops20h 35mKLM
mar. 4/29:45 amCWL - SEA
2 stops32h 38mKLM
Deal found 2/20$1,128
lun. 11/42:35 pmSEA - CWL
1 stop23h 05mKLM
vie. 11/86:00 amCWL - SEA
2 stops18h 32mKLM
Deal found 2/21$1,273
lun. 11/46:00 amSEA - CWL
2 stops19h 45mDelta
vie. 11/86:00 amCWL - SEA
2 stops24h 11mDelta
Deal found 2/21$1,278
lun. 11/42:35 pmSEA - CWL
1 stop18h 20mKLM
vie. 11/85:25 pmCWL - SEA
1 stop24h 50mKLM
Deal found 2/21$1,313

One-way flights to Cardiff from Seattle

Search for one-way flight options from Seattle to Cardiff. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,442,422 searches. Data last updated febrero 22, 2024.
vie. 6/283:30 pmSEA - CWL
3 stops44h 40mMultiple Airlines
Deal found 2/20$497
vie. 6/286:45 pmSEA - CWL
2 stops41h 25mMultiple Airlines
Deal found 2/20$796
sáb. 6/2911:55 pmSEA - CWL
2 stops25h 20mDelta
Deal found 2/20$996
sáb. 6/296:45 pmSEA - CWL
3 stops32h 45mAer Lingus
Deal found 2/20$1,039
vie. 6/286:05 pmSEA - CWL
1 stop14h 40mKLM
Deal found 2/20$1,091

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 3,442,422 searches. Data last updated febrero 22, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,024 - $1,128

Route

Depart

Return

Price

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 3/29

1 stop18h 35m

Cardiff Wales

mar. 4/2

1 stop25h 05m

$1,024

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 3/29

1 stop18h 35m

Cardiff Wales

mar. 4/2

2 stops41h 09m

$1,034

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 3/29

1 stop18h 35m

Cardiff Wales

mar. 4/2

1 stop31h 25m

$1,064

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 3/29

1 stop18h 35m

Cardiff Wales

mar. 4/2

2 stops36h 33m

$1,074

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 3/29

2 stops27h 45m

Cardiff Wales

mar. 4/2

2 stops30h 48m

$1,078

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 3/29

2 stops20h 35m

Cardiff Wales

mar. 4/2

2 stops32h 38m

$1,128

Flights are sorted by cheapest first

Deals found on 2/21

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 February 18, 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.
Search Deals

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 $884 while a round-trip flight costs $1,067. Price data was last updated on February 18, 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 $1,505). 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

$796

April

$819

May

$859

June

$1,505

July

$1,315

August

$1,045

September

$909

October

$820

November

$923

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 febrero 22, 2024.
8.1
Very good
11,921 reviews

Overall

8.1

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.5

Entertainment

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

8.1
Very good
11,921 reviews
8.1
Very good
11,921 reviews

Overall

8.1

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.5

Entertainment

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

7.8
Good
1,778 reviews
8.1
Very good
11,921 reviews

Overall

8.1

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.5

Entertainment

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

7.3
Good
1,426 reviews
8.1
Very good
11,921 reviews

Overall

8.1

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.5

Entertainment

8.1

Reviews

1 / 10

It was a good experience other than a short delay.

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 $1,024, but on average you can expect to pay $1,067.

What is the cheapest airline to fly from Seattle to Cardiff round-trip?

Cheapflights users have booked flights from Seattle to Cardiff round-trip from $1,024.

What are the cheapest airlines to fly from Seattle to Cardiff one-way?

One-way options have recently been found by users for as low as $996 on Delta. Other airlines that offer cheap prices include Aer Lingus from $1,039 and KLM from $1,091 one-way.

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.

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.

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 3,442,422 searches. Data last updated febrero 22, 2024.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$698Average$970FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest$776Average$1,052FlexibilityNo cancel feeOn-timeN/A
Search Delta flights

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.

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations

Fly with Cheapflights

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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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