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Cheap flights from Seattle (SEA) to Cardiff (CWL) from $371

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 8/7. 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
Jun 2 — Jun 91
From?
To?
Sun 6/2
Sun 6/9
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 May 28, 2024.

Popular in

June

Cheapest in

December

Average price

$1,098

Round-trip from

$708
High demand for flights, 34% potential price rise
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Best time to find cheap flights, 28% potential price drop
Search Deals
Average for round-trip flights in May 2024
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From Seattle/Tacoma Intl to Cardiff Wales
Search Deals

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.

What is the cheapest month to fly from Seattle to Cardiff?

December can be a great time to fly to Cardiff from Seattle with a flight ticket averaging about $1,090. Cheapflights users have found deals in the month of December for as cheap as $783. The most expensive prices can be found in the month of June.

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 27% versus a flight at noon.

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 2,740,132 searches. Data last updated May 28, 2024.
Peruse some of the lowest-priced KLM flights we've found from Seattle to Cardiff. Be sure to come back soon if the deals available don't appeal to you at this time.
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/27$1,198
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/28$1,199
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/28$1,209
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/27$1,243
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/28$1,277
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/27$1,312
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/139:45 amCWL - SEA
2 stops19h 02mKLM
Deal found 5/28$1,332
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 5/28$1,372
Mon 7/157:10 amSEA - CWL
2 stops18h 05mKLM
Tue 7/235:15 pmCWL - SEA
1 stop25h 00mKLM
Deal found 5/28$1,391

Cheap Air France flights from Seattle to Cardiff

Explore cheap flight options specifically provided by Air France 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 2,740,132 searches. Data last updated May 28, 2024.
Have a look at some of the cheapest available Air France flights departing from Seattle and landing in Cardiff. Ensure the flight price, dates, time, and airline match your criteria before you book.
Sat 6/156:05 pmSEA - CWL
1 stop14h 40mAir France
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mAir France
Deal found 5/27$1,955
Sat 6/156:05 pmSEA - CWL
1 stop14h 40mAir France
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mAir France
Deal found 5/28$2,006
Sat 6/151:30 pmSEA - CWL
1 stop19h 15mAir France
Wed 6/199:45 amCWL - SEA
1 stop14h 50mAir France
Deal found 5/27$2,449

Cheap Seattle to Cardiff flights in May & June 2024

Find cheap flight options from Seattle to Cardiff specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,740,132 searches. Prices were last updated on May 28, 2024.
These are some of the most attractive deals on flights from Seattle to Cardiff in 2024. Check back in a little while for more flight options.
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/27$1,198
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/28$1,199
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/28$1,209
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/27$1,243
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/28$1,277
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/27$1,312
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/139:45 amCWL - SEA
2 stops19h 02mKLM
Deal found 5/28$1,332
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 5/28$1,372
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/139:45 amCWL - SEA
2 stops19h 02mKLM
Deal found 5/27$1,447

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 2,740,132 searches. Data last updated May 28, 2024.
These are some of the most attractive deals on flights from Seattle to Cardiff in 2024. Check back in a little while for more flight options.
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/27$1,198
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/28$1,199
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/28$1,209
Wed 6/121:30 pmSEA - CWL
1 stop19h 15mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/27$1,243
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/28$1,277
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/27$1,312
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/139:45 amCWL - SEA
2 stops19h 02mKLM
Deal found 5/28$1,332
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 5/28$1,372
Mon 7/157:10 amSEA - CWL
2 stops18h 05mKLM
Tue 7/235:15 pmCWL - SEA
1 stop25h 00mKLM
Deal found 5/28$1,391

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 2,740,132 searches. Data last updated May 28, 2024.
Users in need of a one-way flight from Seattle to Cardiff can choose from these deals. Users in need of a round-trip flight from Seattle to Cardiff instead should update the search form at the top of page.
Wed 8/711:00 pmSEA - CWL
2 stops38h 30mMultiple Airlines
Deal found 5/26$371
Wed 8/76:55 pmSEA - CWL
3 stops30h 00mMultiple Airlines
Deal found 5/26$426
Wed 8/711:00 pmSEA - CWL
2 stops38h 30mMultiple Airlines
Deal found 5/27$437
Tue 8/612:35 amSEA - CWL
2 stops24h 40mDelta
Deal found 5/26$606
Wed 8/711:00 pmSEA - CWL
3 stops53h 40mMultiple Airlines
Deal found 5/27$609
Wed 8/76:10 pmSEA - CWL
1 stop14h 35mKLM
Deal found 5/26$765
Wed 8/77:00 amSEA - CWL
3 stops28h 45mMultiple Airlines
Deal found 5/26$1,251
Wed 8/71:30 pmSEA - CWL
2 stops38h 00mBritish Airways
Deal found 5/26$1,433
Wed 8/76:10 pmSEA - CWL
1 stop14h 35mKLM
Deal found 5/26$1,835

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 2,740,132 searches. Data last updated May 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,198 - $2,098

Route

Depart

Return

Price

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 6/12

1 stop19h 15m

Cardiff Wales

Wed 6/19

1 stop14h 50m

$1,198

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 6/12

1 stop19h 15m

Cardiff Wales

Wed 6/19

1 stop14h 50m

$1,199

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 6/12

1 stop19h 15m

Cardiff Wales

Wed 6/19

2 stops20h 14m

$1,209

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 6/12

1 stop19h 15m

Cardiff Wales

Wed 6/19

2 stops20h 14m

$1,243

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 7/15

2 stops18h 05m

Cardiff Wales

Tue 7/23

2 stops20h 40m

$1,528

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 7/15

3 stops44h 30m

Cardiff Wales

Tue 7/23

3 stops29h 07m

$1,634

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Mon 7/15

2 stops28h 45m

Cardiff Wales

Tue 7/23

3 stops32h 07m

$1,641

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sat 6/15

1 stop14h 40m

Cardiff Wales

Fri 9/13

1 stop25h 10m

$1,955

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Sun 6/16

2 stops31h 50m

Cardiff Wales

Sun 6/23

2 stops37h 45m

$2,098

Flights are sorted by cheapest first

Deals found on 5/27

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 May 26, 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. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Seattle to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Seattle 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.

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 May 28, 2024.
Peruse reviews from past customers who have flown with KLM and Air France from Seattle to Cardiff to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,476 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.0

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,476 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.0

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,528 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.0

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air France
7.5
Good
1,736 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.0

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

British Airways
6.8
Okay
6,766 reviews
Delta
8.0
Very good
10,476 reviews
Check prices

Comfort

7.9

Boarding

8.2

Crew

8.6

Overall

8.0

Entertainment

8.0

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

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 $1,200 on Cheapflights?

    Yes, there are multiple flights from Seattle to Cardiff for under $1,200. The cheapest flight booked recently is on KLM for just $1,198, but on average you can expect to pay $1,496.

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

    Cheapflights users have booked flights from Seattle to Cardiff round-trip from $1,198. Other airlines that can offer you cheap pricing are Delta, from $1,528, and Air France, from $1,955.

  • 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 $606 on Delta. Other airlines that offer cheap prices include KLM from $765 and British Airways from $1,433 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.

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

    The amount of baggage you can bring on your Seattle to Cardiff flight 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 Seattle to Cardiff 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 find direct flights from Seattle to Cardiff.

  • 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 flying from Seattle to Cardiff 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 5/28.

  • When is the best time to book a flight from Seattle to Cardiff?

    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 $1,565). 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

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Alternative routes for Seattle to Cardiff
See prices for flight routes from nearby airports that may be better suited for you.

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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 2,740,132 searches. Data last updated May 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$707Average$1,023FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest$763Average$1,042FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
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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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Business Class
Prem Econ Class
Economy 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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