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Kansai Intl

$307+ Cheap flights from Seattle (SEA) to Kansai Intl (KIX)

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 12/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KIX
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Osaka Kansai Intl are usually found in November or September, booked 83 days in advance, depart on a Thursday or Monday and return on a Thursday

Cheap flight deals from Seattle to Kansai Intl

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Kansai Intl (KIX). 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 November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$378
(Alaska Airlines)

One-way from

$307
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$762
Provider with most accurate pricing for Seattle/Tacoma Intl-Osaka Kansai Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Osaka Kansai Intl flights.
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From Seattle/Tacoma Intl to Osaka Kansai Intl
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One-way flight from Seattle/Tacoma Intl to Osaka Kansai Intl
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Seattle to Kansai Intl

Cheapest flights from Seattle to Kansai Intl
Explore the most affordable flight options available from Seattle to Kansai Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 13, 2025.

This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:00 amSEA - KIX
1 stop18h 45mAlaska Airlines
Fri 12/58:45 pmKIX - SEA
1 stop20h 01mAlaska Airlines
Deal found 11/12$382
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:55 pmSEA - KIX
1 stop31h 50mAlaska Airlines
Fri 12/58:45 pmKIX - SEA
1 stop18h 24mAlaska Airlines
Deal found 11/12$399
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:00 amSEA - KIX
1 stop18h 45mAlaska Airlines
Tue 12/98:45 pmKIX - SEA
1 stop20h 01mAlaska Airlines
Deal found 11/12$435
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:55 pmSEA - KIX
1 stop31h 50mAlaska Airlines
Tue 12/98:45 pmKIX - SEA
1 stop20h 01mAlaska Airlines
Deal found 11/12$452
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:00 amSEA - KIX
1 stop18h 45mAlaska Airlines
Thu 12/48:45 pmKIX - SEA
1 stop20h 01mAlaska Airlines
Deal found 11/12$462
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:55 pmSEA - KIX
1 stop31h 50mAlaska Airlines
Thu 12/48:45 pmKIX - SEA
1 stop18h 24mAlaska Airlines
Deal found 11/12$479
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:00 amSEA - KIX
1 stop18h 45mAlaska Airlines
Mon 12/88:45 pmKIX - SEA
1 stop20h 01mAlaska Airlines
Deal found 11/12$485
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:55 pmSEA - KIX
1 stop31h 50mAlaska Airlines
Mon 12/88:45 pmKIX - SEA
1 stop20h 01mAlaska Airlines
Deal found 11/12$502
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:00 amSEA - KIX
1 stop18h 45mAlaska Airlines
Sun 12/78:45 pmKIX - SEA
1 stop20h 01mAlaska Airlines
Deal found 11/12$540
This Alaska Airlines deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/275:55 pmSEA - KIX
1 stop31h 50mAlaska Airlines
Sun 12/78:45 pmKIX - SEA
1 stop18h 24mAlaska Airlines
Deal found 11/12$557
This Alaska Airlines deal was found by Cheapflights users on 11/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amSEA - KIX
1 stop18h 45mAlaska Airlines
Sun 11/168:45 pmKIX - SEA
1 stop27h 55mAlaska Airlines
Deal found 11/11$619
This oojo deal was found by Cheapflights users on 11/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2412:10 amSEA - KIX
1 stop15h 30mAsiana Airlines
Wed 12/37:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 11/12$642

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Kansai Intl 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 2,558,603 searches. Data last updated November 13, 2025.
Use the filters below to find and compare flights from Seattle to Osaka Kansai Intl Airport that are best for you.

Fly from

Seattle

Fly to

Kansai Intl

Route

Depart

Return

Price

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 1/19

7:00 am-6:45 pm

1 stop18h 45m

Osaka Kansai Intl

Mon 1/26

8:45 pm-5:19 am

1 stop25h 34m

$395

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 11/27

5:55 pm-6:45 pm

1 stop31h 50m

Osaka Kansai Intl

Fri 12/5

8:45 pm-10:09 pm

1 stop18h 24m

$399

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 1/11

7:00 am-6:45 pm

1 stop18h 45m

Osaka Kansai Intl

Sun 1/18

8:45 pm-10:17 pm

1 stop18h 32m

$485

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 11/27

5:55 pm-6:45 pm

1 stop31h 50m

Osaka Kansai Intl

Sun 12/7

8:45 pm-10:09 pm

1 stop18h 24m

$557

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 1/29

6:18 am-4:40 pm

1 stop17h 22m

Osaka Kansai Intl

Sat 2/14

8:20 am-1:20 pm

1 stop22h 00m

$646

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 1/28

7:32 pm-7:25 pm

2 stops30h 53m

Osaka Kansai Intl

Mon 2/16

8:20 am-1:20 pm

1 stop22h 00m

$653

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 1/28

7:32 pm-7:25 pm

2 stops30h 53m

Osaka Kansai Intl

Sat 2/14

8:20 am-1:20 pm

1 stop22h 00m

$653

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 1/27

6:18 am-4:40 pm

1 stop17h 22m

Osaka Kansai Intl

Sat 2/14

8:20 am-1:20 pm

1 stop22h 00m

$654

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 2/8

6:18 am-4:40 pm

1 stop17h 22m

Osaka Kansai Intl

Mon 3/2

8:20 am-1:20 pm

1 stop22h 00m

$654

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 1/29

6:18 am-4:40 pm

1 stop17h 22m

Osaka Kansai Intl

Tue 2/17

8:20 am-1:20 pm

1 stop22h 00m

$654

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

Showing 1-10 of 19 results
1
2

Compare providers for flights from Seattle to Kansai Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Kansai Intl in November.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
ExpediaPrice Accuracy2 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Osaka Kansai Intl Airport flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Osaka Kansai Intl Airport flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Osaka Kansai Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Osaka Kansai Intl Airport flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Osaka Kansai Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Kansai Intl

Have a flexible travel schedule? Discover the best time to fly to Kansai Intl 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Osaka Kansai Intl Airport

How far ahead should I book a flight from Seattle to Osaka Kansai Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Kansai Intl. Price data was last updated on November 7, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Osaka Kansai Intl Airport, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Seattle to Osaka Kansai Intl Airport?

Currently, January is the cheapest month in which you can book a flight from Seattle to Osaka Kansai Intl Airport (average of $370). Flying from Seattle to Osaka Kansai Intl Airport in July is currently the most expensive (average of $763). 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.

What is the cheapest time of day to fly from SEA to KIX?

Find hourly flight availability from Seattle to Kansai Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 13, 2025.

It’s typically best to fly out from Seattle to Osaka Kansai Intl Airport in the morning. Doing so could potentially save you 32% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Seattle to Osaka Kansai Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Kansai Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Osaka Kansai Intl Airport flight should consider departing on Thursday at noon 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.

Reviews of airlines servicing Kansai Intl

Get insights into the airlines that provide service to Kansai Intl. 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 Kansai Intl. Reviews last updated November 13, 2025.
See what other customers who have flown with STARLUX Airlines, ANA, and Korean Air from Seattle to Osaka Kansai Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
8.9
Very good
227 reviews

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
STARLUX Airlines
8.9
Very good
227 reviews
STARLUX Airlines
8.9
Very good
227 reviews

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
ANA
8.4
Very good
1,004 reviews
STARLUX Airlines
8.9
Very good
227 reviews

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
Korean Air
8.4
Very good
1,163 reviews
STARLUX Airlines
8.9
Very good
227 reviews

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
Asiana Airlines
8.2
Very good
486 reviews
STARLUX Airlines
8.9
Very good
227 reviews

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!
Air Canada
7.1
Good
10,448 reviews
STARLUX Airlines
8.9
Very good
227 reviews

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Boarding

8.9

Food

8.7

Reviews

1 / 8
10.0
Excellent

Anonymous,Sep 2025

TPE - CRK

Superb service! My second time flying with Starlux to Clark. Will definately fly this route with them again!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Kansai Intl. 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 from for flights from Seattle to Osaka Kansai Intl?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Osaka Kansai Intl. 8 airlines have flights from Seattle/Tacoma Intl to Osaka Kansai Intl on a regular basis. Booking flights from Seattle/Tacoma Intl to Osaka Kansai Intl should not be difficult; the airport handles an average of 0 outbound flights to Osaka Kansai Intl per day.

  • How long is the flight from Seattle to Osaka Kansai Intl Airport?

    Alaska Airlines and United Airlines can get you from Seattle to Osaka Kansai Intl Airport in just under 17h 22m. Your travel time can differ by up to 1h 23m. The distance from Seattle to Osaka Kansai Intl Airport is about 5024 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Osaka Kansai Intl Airport round-trip?

    Flying on Asiana Airlines is currently your cheapest option to Osaka Kansai Intl Airport, with prices starting at $610. Additional round-trip tickets that might be worth considering are offered by Delta and ANA, with the lowest prices starting at $649 and $660, respectively. These flights start at 35% lower than the current average price 3 months from now.

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

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

  • How can I find direct flights from Seattle to Kansai Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Kansai Intl.

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

    Yes. Cheapflights offers flight deals from Seattle to Kansai Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Osaka Kansai Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Osaka Kansai Intl Airport (average of $370). Flying from Seattle to Osaka Kansai Intl Airport in July is currently the most expensive (average of $763). 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

Traveling to a place near Osaka Kansai Intl Airport?

Book flights to Osaka Kansai Intl Airport if you plan to visit one of these locations
Nara
Izumisano
Nishinomiya
Himeji

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Alternative routes for Seattle to Kansai Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Seattle to Kansai Intl

Discover the top 8 airlines that operate flights from Seattle to Kansai Intl. 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 2,558,603 searches. Data last updated November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$610Average$790FlexibilityNo cancel feeOn-time76%
DeltaCheapest$649Average$894FlexibilityNo cancel feeOn-timeN/A
ANACheapest$660Average$873FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$669Average$802FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$716Average$1,079FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$734Average$905FlexibilityNo cancel feeOn-time69%
STARLUX AirlinesCheapest$975Average$1,267FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$1,056Average$1,186FlexibilityNo cancel feeOn-time70%

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