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Kansai Intl

$329+ 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KIX
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Osaka Kansai Intl are usually found in September or February, booked 27 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 October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$607
(CrystalTravel)

One-way from

$329
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$792
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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Highest demand for flights based on searches. 1% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:40 pmSEA - KIX
1 stop13h 40mANA
Thu 11/203:45 pmKIX - SEA
1 stop14h 35mANA
Deal found 10/20$640
This oojo deal was found by Cheapflights users on 10/17. 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.
Tue 12/211:00 amSEA - KIX
1 stop32h 50mKorean Air
Tue 12/96:10 pmKIX - SEA
1 stop31h 50mKorean Air
Deal found 10/17$648
This oojo deal was found by Cheapflights users on 10/18. 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.
Wed 12/311:00 amSEA - KIX
1 stop30h 45mKorean Air
Wed 12/109:00 amKIX - SEA
1 stop17h 00mKorean Air
Deal found 10/18$649
This CrystalTravel deal was found by Cheapflights users on 10/19. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:10 amSEA - KIX
1 stop24h 55mAsiana Airlines
Thu 11/1310:30 amKIX - SEA
1 stop20h 25mAsiana Airlines
Deal found 10/19$650
This oojo deal was found by Cheapflights users on 10/18. 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.
Tue 10/2812:10 amSEA - KIX
1 stop16h 30mAsiana Airlines
Wed 11/57:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 10/18$656
This oojo deal was found by Cheapflights users on 10/17. 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.
Sat 11/812:10 amSEA - KIX
1 stop15h 30mAsiana Airlines
Tue 11/189:00 amKIX - SEA
1 stop21h 55mAsiana Airlines
Deal found 10/17$657
This Expedia deal was found by Cheapflights users on 10/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:00 amSEA - KIX
1 stop16h 40mANA
Tue 12/95:35 pmKIX - SEA
1 stop12h 45mANA
Deal found 10/17$659
This FlightHub deal was found by Cheapflights users on 10/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/412:10 amSEA - KIX
1 stop24h 55mAsiana Airlines
Wed 12/37:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 10/18$660
This Gotogate deal was found by Cheapflights users on 10/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/212:10 amSEA - KIX
1 stop15h 30mAsiana Airlines
Wed 12/107:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 10/19$669
This Gotogate deal was found by Cheapflights users on 10/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Tue 11/259:00 amKIX - SEA
1 stop21h 55mAsiana Airlines
Deal found 10/19$676
This Cheapflightsfares deal was found by Cheapflights users on 10/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:00 amSEA - KIX
1 stop16h 40mANA
Thu 12/1811:05 amKIX - SEA
1 stop19h 15mANA
Deal found 10/18$678

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 October 20, 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

Sun 2/1

6:18 am-7:25 pm

2 stops20h 07m

Osaka Kansai Intl

Sun 2/8

8:20 am-9:12 pm

2 stops29h 52m

$669

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 12/3

5:30 am-4:40 pm

1 stop18h 10m

Osaka Kansai Intl

Wed 12/10

6:35 pm-10:30 pm

2 stops20h 55m

$669

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 3/2

5:15 am-4:40 pm

1 stop18h 25m

Osaka Kansai Intl

Wed 3/18

8:20 am-2:20 pm

1 stop22h 00m

$670

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 1/13

6:18 am-7:25 pm

2 stops20h 07m

Osaka Kansai Intl

Tue 1/20

8:20 am-9:12 pm

3 stops29h 52m

$673

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 3/1

8:45 am-4:40 pm

2 stops38h 55m

Osaka Kansai Intl

Wed 3/18

8:20 am-2:20 pm

1 stop22h 00m

$680

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 3/3

8:45 am-4:40 pm

2 stops38h 55m

Osaka Kansai Intl

Thu 3/19

8:20 am-2:20 pm

1 stop22h 00m

$680

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 3/1

11:00 am-8:45 pm

1 stop16h 45m

Osaka Kansai Intl

Fri 3/20

11:55 am-10:00 am

1 stop14h 05m

$681

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 11/3

11:00 am-8:45 pm

1 stop16h 45m

Osaka Kansai Intl

Mon 11/10

2:00 pm-9:00 am

1 stop36h 00m

$681

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 11/12

11:00 am-8:45 pm

1 stop16h 45m

Osaka Kansai Intl

Fri 11/21

9:00 am-9:00 am

1 stop17h 00m

$681

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 12/2

7:00 am-4:40 pm

1 stop16h 40m

Osaka Kansai Intl

Tue 12/9

6:35 pm-10:30 pm

2 stops20h 55m

$682

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Showing 1-10 of 18 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 October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Osaka Kansai Intl Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 October 17, 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 27 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, February is the cheapest month in which you can book a flight from Seattle to Osaka Kansai Intl Airport (average of $610). Flying from Seattle to Osaka Kansai Intl Airport in January is currently the most expensive (average of $801). 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 October 20, 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 October 20, 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
219 reviews

Crew

9.2

Overall

8.9

Food

8.7

Comfort

8.9

Entertainment

8.8

Boarding

8.9

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
219 reviews
STARLUX Airlines
8.9
Very good
219 reviews

Crew

9.2

Overall

8.9

Food

8.7

Comfort

8.9

Entertainment

8.8

Boarding

8.9

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
990 reviews
STARLUX Airlines
8.9
Very good
219 reviews

Crew

9.2

Overall

8.9

Food

8.7

Comfort

8.9

Entertainment

8.8

Boarding

8.9

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
1,153 reviews
STARLUX Airlines
8.9
Very good
219 reviews

Crew

9.2

Overall

8.9

Food

8.7

Comfort

8.9

Entertainment

8.8

Boarding

8.9

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
485 reviews
STARLUX Airlines
8.9
Very good
219 reviews

Crew

9.2

Overall

8.9

Food

8.7

Comfort

8.9

Entertainment

8.8

Boarding

8.9

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
10,334 reviews
STARLUX Airlines
8.9
Very good
219 reviews

Crew

9.2

Overall

8.9

Food

8.7

Comfort

8.9

Entertainment

8.8

Boarding

8.9

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. 10 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?

    United Airlines and Korean Air can get you from Seattle to Osaka Kansai Intl Airport in just under 16h 45m. Your travel time can differ by up to 3h 22m. 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 $662, respectively. These flights start at 36% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Osaka Kansai Intl Airport one-way?

    $330 is the cheapest one-way deal found within the past few days, from ANA. You may also be able to find cheap deals on Philippine Airlines and United Airlines, with prices starting from $338 and $351, respectively.

  • 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, February is the cheapest month in which you can book a flight from Seattle to Osaka Kansai Intl Airport (average of $610). Flying from Seattle to Osaka Kansai Intl Airport in January is currently the most expensive (average of $801). 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 10 airlines flying from Seattle to Kansai Intl

Discover the top 10 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$610Average$833FlexibilityNo cancel feeOn-time76%
DeltaCheapest$649Average$894FlexibilityNo cancel feeOn-timeN/A
ANACheapest$666Average$896FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$669Average$802FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$716Average$1,133FlexibilityNo cancel feeOn-time81%
China EasternCheapest$719Average$756FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$734Average$905FlexibilityNo cancel feeOn-time69%
STARLUX AirlinesCheapest$975Average$1,187FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$1,033Average$1,218FlexibilityNo cancel feeOn-time74%
China AirlinesCheapest$1,047Average$1,186FlexibilityNo cancel feeOn-time70%

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