HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Seattle (SEA) to Cardiff (CWL) from $805

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 9/4. 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
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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 16, 2024.

Popular in

June

Cheapest in

December

Average price

$1,098

Round-trip from

$708
High demand for flights, 34% potential price rise
Search Deals
Best time to find cheap flights, 29% potential price drop
Search Deals
Average for round-trip flights in May 2024
Search Deals
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 $1,096. 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 17% versus a flight at noon.

Cheap Delta flights from Seattle to Cardiff

Explore cheap flight options specifically provided by Delta 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 2,637,452 searches. Data last updated May 16, 2024.
Peruse some of the lowest-priced Delta 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 9/47:20 amSEA - CWL
2 stops17h 55mDelta
Fri 9/209:45 amCWL - SEA
2 stops20h 11mDelta
Deal found 5/15$820
Wed 9/47:20 amSEA - CWL
2 stops17h 55mDelta
Fri 9/209:45 amCWL - SEA
1 stop15h 05mDelta
Deal found 5/15$863
Tue 10/2912:35 amSEA - CWL
2 stops26h 10mDelta
Sun 11/310:15 amCWL - SEA
1 stop32h 00mDelta
Deal found 5/15$864
Tue 10/2912:35 amSEA - CWL
2 stops26h 10mDelta
Sun 11/310:15 amCWL - SEA
2 stops43h 41mDelta
Deal found 5/15$874
Tue 9/312:30 amSEA - CWL
2 stops24h 45mDelta
Fri 9/209:45 amCWL - SEA
2 stops18h 27mDelta
Deal found 5/15$981
Tue 9/312:30 amSEA - CWL
2 stops24h 45mDelta
Fri 9/209:45 amCWL - SEA
1 stop15h 05mDelta
Deal found 5/15$1,024

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 2,637,452 searches. Data last updated May 16, 2024.
Have a look at some of the cheapest available KLM flights departing from Seattle and landing in Cardiff. Ensure the flight price, dates, time, and airline match your criteria before you book.
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/15$1,078
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/139:45 amCWL - SEA
2 stops20h 11mKLM
Deal found 5/15$1,091
Sat 6/156:05 pmSEA - CWL
1 stop14h 40mKLM
Fri 9/139:45 amCWL - SEA
2 stops20h 11mKLM
Deal found 5/15$1,118
Wed 6/126:05 pmSEA - CWL
1 stop14h 40mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/15$1,123
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/16$1,128
Sun 5/267:45 amSEA - CWL
2 stops17h 30mKLM
Sat 6/155:15 pmCWL - SEA
1 stop25h 05mKLM
Deal found 5/16$1,138
Wed 6/126:05 pmSEA - CWL
1 stop14h 40mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/16$1,174
Sun 5/267:10 amSEA - CWL
2 stops18h 05mKLM
Sat 6/159:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/16$1,184
Sat 6/156:05 pmSEA - CWL
1 stop14h 40mKLM
Fri 9/135:15 pmCWL - SEA
1 stop25h 10mKLM
Deal found 5/15$1,232

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 2,637,452 searches. Prices were last updated on May 16, 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 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/15$1,078
Sat 6/157:10 amSEA - CWL
2 stops18h 05mKLM
Fri 9/139:45 amCWL - SEA
2 stops20h 11mKLM
Deal found 5/15$1,091
Thu 6/137:10 amSEA - CWL
2 stops18h 05mKLM
Thu 6/209:45 amCWL - SEA
2 stops20h 27mKLM
Deal found 5/16$1,113
Sat 6/156:05 pmSEA - CWL
1 stop14h 40mKLM
Fri 9/139:45 amCWL - SEA
2 stops20h 11mKLM
Deal found 5/15$1,118
Wed 6/126:05 pmSEA - CWL
1 stop14h 40mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/15$1,123
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/16$1,128
Wed 6/121:30 pmSEA - CWL
2 stops38h 00mBritish Airways
Wed 6/1912:00 pmCWL - SEA
2 stops31h 30mBritish Airways
Deal found 5/15$1,135
Sun 5/267:45 amSEA - CWL
2 stops17h 30mKLM
Sat 6/155:15 pmCWL - SEA
1 stop25h 05mKLM
Deal found 5/16$1,138
Wed 6/126:05 pmSEA - CWL
1 stop14h 40mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/16$1,174

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 2,637,452 searches. Data last updated May 16, 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 9/46:10 pmSEA - CWL
1 stop14h 35mAir France
Fri 9/209:45 amCWL - SEA
1 stop15h 05mAir France
Deal found 5/15$805
Wed 9/47:20 amSEA - CWL
2 stops17h 55mDelta
Fri 9/209:45 amCWL - SEA
2 stops20h 11mDelta
Deal found 5/15$820
Wed 10/303:35 pmSEA - CWL
1 stop23h 05mVirgin Atlantic
Sun 11/35:25 pmCWL - SEA
1 stop24h 50mVirgin Atlantic
Deal found 5/15$859
Wed 9/47:20 amSEA - CWL
2 stops17h 55mDelta
Fri 9/209:45 amCWL - SEA
1 stop15h 05mDelta
Deal found 5/15$863
Tue 10/2912:35 amSEA - CWL
2 stops26h 10mDelta
Sun 11/310:15 amCWL - SEA
1 stop32h 00mDelta
Deal found 5/15$864
Tue 10/2912:35 amSEA - CWL
2 stops26h 10mDelta
Sun 11/310:15 amCWL - SEA
2 stops43h 41mDelta
Deal found 5/15$874
Tue 9/312:30 amSEA - CWL
2 stops24h 45mDelta
Fri 9/209:45 amCWL - SEA
2 stops18h 27mDelta
Deal found 5/15$981
Tue 9/312:30 amSEA - CWL
2 stops24h 45mDelta
Fri 9/209:45 amCWL - SEA
1 stop15h 05mDelta
Deal found 5/15$1,024
Wed 6/127:50 amSEA - CWL
2 stops17h 25mKLM
Wed 6/199:45 amCWL - SEA
1 stop14h 50mKLM
Deal found 5/15$1,078

Seattle to Cardiff flights leaving soon

Find last-minute flight options from Seattle to Cardiff for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
Book one of these great deals on flights from Seattle to Cardiff. Tip: verify your flight details before completing your reservation.
Sun 5/267:45 amSEA - CWL
2 stops17h 30mKLM
Sat 6/155:15 pmCWL - SEA
1 stop25h 05mKLM
Deal found 5/16$1,138
Sun 5/267:10 amSEA - CWL
2 stops18h 05mKLM
Sat 6/159:45 amCWL - SEA
2 stops20h 14mKLM
Deal found 5/16$1,184
Sun 5/266:10 pmSEA - CWL
1 stop14h 35mKLM
Sat 6/155:15 pmCWL - SEA
1 stop25h 05mKLM
Deal found 5/16$1,346

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 2,637,452 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$805 - $1,622

Route

Depart

Return

Price

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 9/4

1 stop14h 35m

Cardiff Wales

Fri 9/20

1 stop15h 05m

$805

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 9/4

2 stops17h 55m

Cardiff Wales

Fri 9/20

2 stops20h 11m

$820

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 10/30

1 stop23h 05m

Cardiff Wales

Sun 11/3

1 stop24h 50m

$859

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 9/4

2 stops17h 55m

Cardiff Wales

Fri 9/20

1 stop15h 05m

$863

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 10/29

2 stops26h 10m

Cardiff Wales

Sun 11/3

1 stop32h 00m

$864

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Tue 10/29

2 stops26h 10m

Cardiff Wales

Sun 11/3

2 stops43h 41m

$874

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 6/12

2 stops17h 25m

Cardiff Wales

Wed 6/19

1 stop14h 50m

$1,078

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 6/12

2 stops38h 00m

Cardiff Wales

Wed 6/19

2 stops31h 30m

$1,135

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

Wed 9/4

3 stops25h 05m

Cardiff Wales

Fri 9/20

3 stops32h 50m

$1,622

Flights are sorted by cheapest first

Deals found on 5/15

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 12, 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

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 $991. Price data was last updated on May 12, 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 $1,565). 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.

January

$708

February

$727

March

$897

April

$784

May

$945

June

$1,565

July

$1,315

August

$998

September

$840

October

$851

November

$888

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 May 16, 2024.
Peruse reviews from past customers who have flown with Delta, KLM and British Airways 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
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

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
10,673 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

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
1,568 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

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.

Virgin Atlantic
7.7
Good
735 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

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
7.6
Good
1,764 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

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
6,829 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Crew

8.6

Food

7.4

Comfort

7.9

Entertainment

8.0

Boarding

8.2

Overall

8.0

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 $900 on Cheapflights?

    Yes, there are multiple flights from Seattle to Cardiff for under $900. The cheapest flight booked recently is on Air France for just $805, but on average you can expect to pay $1,052.

  • Are there last-minute flights available from Seattle to Cardiff for under $1,200?

    There are currently 3+ open flights from Seattle to Cardiff within the next 7 days for less than $1,200.

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

    Cheapflights users have booked flights from Seattle to Cardiff round-trip from $805. Other airlines that can offer you cheap pricing are Delta, from $820, and Virgin Atlantic, from $859. These flights start at 26% lower than the current average price 3 months from now.

  • 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 5/16.

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.

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

Seattle to Manchester flights
Portland to Manchester flights
Spokane to Manchester flights
Portland to Bristol flights
Seattle to Bristol flights

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 2,637,452 searches. Data last updated May 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$708Average$1,060FlexibilityNo cancel feeOn-time75%
Search KLM flights
DeltaCheapest$765Average$1,022FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Phoenix to Miami flights
New York to Cancún flights
Cincinnati to Orlando flights
Houston to Washington, D.C. flights
Fort Lauderdale to Los Angeles flights
Los Angeles to Detroit flights
Orlando to Boston flights
USA to Paris flights
Boston to Barcelona flights
Orlando to Nashville flights
Los Angeles to Honolulu flights
Seattle to Nha Trang 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.
First Class
Business Class
Prem Econ Class
Economy 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
Flights to Montes Claros
Flights to Girona Costa Brava
Flights to Naxos
Flights to Bourgas
Flights to Hyannis Barnstable
Flights to Samos
Flights to Reggio Calabria Tito Menniti
Flights to Devils Lake
Flights to Ningbo Lishe Intl
Flights to Pellston Emmet County
Flights to Provincetown
Flights to Cortez Montezuma County
Flights to Ohrid
Flights to Oran Es Senia
Flights to Menorca/Mahon
Flights to Hakodate
Flights to Ordu/Giresun
Flights to Laayoune Hassan I
Flights to Cornwall Newquay
Flights to Melilla
Flights to Rennes St Jacques
Flights to Parikia Paros
Flights to Constanţa Mihail Kogalniceanu
Flights to Miyakojima Hirara

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!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines