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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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KIX
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap 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 February 3, 2026.

This CrystalTravel deal was found by Cheapflights users on 2/3. 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.
Sun 4/1212:55 am
SEA
-
KIX
1 stop25h 35m
Asiana Airlines
Mon 4/279:30 am
KIX
-
SEA
1 stop21h 25m
Asiana Airlines
Deal found 2/3$616
This oojo deal was found by Cheapflights users on 2/3. 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 9/2912:55 am
SEA
-
KIX
1 stop25h 35m
Asiana Airlines
Thu 10/810:40 am
KIX
-
SEA
1 stop20h 15m
Asiana Airlines
Deal found 2/3$617
This oojo deal was found by Cheapflights users on 2/1. 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 4/2012:55 am
SEA
-
KIX
1 stop16h 05m
Asiana Airlines
Wed 5/137:45 pm
KIX
-
SEA
1 stop35h 10m
Asiana Airlines
Deal found 2/1$623
This FlightHub deal was found by Cheapflights users on 2/1. 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.
Mon 2/2312:10 am
SEA
-
KIX
1 stop27h 45m
Asiana Airlines
Tue 3/177:25 pm
KIX
-
SEA
1 stop35h 30m
Asiana Airlines
Deal found 2/1$626
This Gotogate deal was found by Cheapflights users on 2/2. 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 2/35:50 am
SEA
-
KIX
2 stops33h 55m
Multiple Airlines
Tue 2/108:00 am
KIX
-
SEA
2 stops28h 16m
Multiple Airlines
Deal found 2/2$631
This FlightHub deal was found by Cheapflights users on 2/1. 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.
Sun 7/2612:55 am
SEA
-
KIX
1 stop16h 05m
Asiana Airlines
Wed 8/197:45 pm
KIX
-
SEA
1 stop35h 40m
Asiana Airlines
Deal found 2/1$632
This FlightHub deal was found by Cheapflights users on 2/2. 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.
Fri 7/2412:55 am
SEA
-
KIX
1 stop16h 05m
Asiana Airlines
Thu 8/2010:40 am
KIX
-
SEA
1 stop20h 45m
Asiana Airlines
Deal found 2/2$635
This CrystalTravel deal was found by Cheapflights users on 2/1. 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.
Sun 7/267:00 am
SEA
-
KIX
1 stop15h 50m
ANA
Wed 8/197:00 am
KIX
-
SEA
1 stop23h 25m
ANA
Deal found 2/1$639
This Gotogate deal was found by Cheapflights users on 2/1. 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 4/2012:55 am
SEA
-
KIX
1 stop28h 40m
Asiana Airlines
Wed 4/297:45 pm
KIX
-
SEA
1 stop35h 10m
Asiana Airlines
Deal found 2/1$641
This FlightHub deal was found by Cheapflights users on 1/31. 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.
Thu 4/1612:55 am
SEA
-
KIX
1 stop28h 40m
Asiana Airlines
Sat 4/258:40 pm
KIX
-
SEA
1 stop34h 15m
Asiana Airlines
Deal found 1/31$642
This Air Canada deal was found by Cheapflights users on 1/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/27:20 pm
SEA
-
KIX
1 stop29h 05m
Air Canada
Thu 5/76:00 pm
KIX
-
SEA
1 stop20h 20m
Air Canada
Deal found 1/31$646

Find 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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$617
(CrystalTravel)

One-way from

$307
(CrystalTravel)

Popular in

June

Cheapest in

February

Average price

$716
Provider with most accurate pricing for Seattle/Tacoma Intl-Osaka Kansai Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Osaka Kansai Intl flights.
Search Deals
From Seattle/Tacoma Intl to Osaka Kansai Intl
Search Deals
One-way flight from Seattle/Tacoma Intl to Osaka Kansai Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($171 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 3, 2026.
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

Fri 5/1

5:40 am-4:25 pm

1 stop18h 45m

Osaka Kansai Intl

Thu 5/14

6:00 pm-6:30 pm

1 stop16h 30m

$646

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 3/2

12:10 am-6:05 pm

1 stop24h 55m

Osaka Kansai Intl

Mon 4/6

8:40 pm-2:55 pm

1 stop34h 15m

$648

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 4/29

7:12 am-2:50 pm

1 stop15h 38m

Osaka Kansai Intl

Fri 5/8

4:55 pm-9:06 pm

1 stop20h 11m

$664

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 3/7

12:10 am-8:55 pm

1 stop27h 45m

Osaka Kansai Intl

Wed 3/11

9:00 am-2:55 pm

1 stop21h 55m

$667

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 4/21

12:22 pm-2:50 pm

2 stops34h 28m

Osaka Kansai Intl

Wed 5/13

4:55 pm-9:58 pm

2 stops21h 03m

$669

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 4/28

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Sat 5/9

8:40 pm-2:55 pm

1 stop34h 15m

$680

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 7/27

7:20 am-9:00 pm

2 stops21h 40m

Osaka Kansai Intl

Thu 8/20

6:20 pm-3:24 pm

2 stops37h 04m

$684

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 7/26

7:20 am-11:20 am

2 stops36h 00m

Osaka Kansai Intl

Thu 8/20

6:20 pm-3:24 pm

2 stops37h 04m

$684

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 5/6

12:50 pm-11:20 am

1 stop30h 30m

Osaka Kansai Intl

Wed 5/27

9:05 am-10:40 am

1 stop17h 35m

$688

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 5/10

7:17 am-9:00 pm

2 stops21h 43m

Osaka Kansai Intl

Tue 6/2

9:05 am-10:50 am

1 stop17h 45m

$694

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/1

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 February.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars
ExpediaPrice Accuracy1 starTrust 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 January 30, 2026.

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 June is currently the most expensive (average of $984). 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.

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 February 3, 2026.
See what other customers who have flown with STARLUX Airlines, ANA, and Asiana Airlines 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
269 reviews

Boarding

8.9

Comfort

8.8

Entertainment

8.8

Overall

8.9

Food

8.6

Crew

9.1

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
STARLUX Airlines
8.9
Very good
269 reviews
STARLUX Airlines
8.9
Very good
269 reviews

Boarding

8.9

Comfort

8.8

Entertainment

8.8

Overall

8.9

Food

8.6

Crew

9.1

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
ANA
8.4
Very good
1,082 reviews
STARLUX Airlines
8.9
Very good
269 reviews

Boarding

8.9

Comfort

8.8

Entertainment

8.8

Overall

8.9

Food

8.6

Crew

9.1

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Asiana Airlines
8.1
Very good
502 reviews
STARLUX Airlines
8.9
Very good
269 reviews

Boarding

8.9

Comfort

8.8

Entertainment

8.8

Overall

8.9

Food

8.6

Crew

9.1

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Alaska Airlines
8.0
Very good
11,831 reviews
STARLUX Airlines
8.9
Very good
269 reviews

Boarding

8.9

Comfort

8.8

Entertainment

8.8

Overall

8.9

Food

8.6

Crew

9.1

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
Air Canada
7.1
Good
10,676 reviews
STARLUX Airlines
8.9
Very good
269 reviews

Boarding

8.9

Comfort

8.8

Entertainment

8.8

Overall

8.9

Food

8.6

Crew

9.1

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

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?

    Air Canada, Asiana Airlines, and United Airlines can get you from Seattle to Osaka Kansai Intl Airport in just under 15h 38m. Your travel time can differ by up to 9h 17m. 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 Alaska Airlines is currently your cheapest option to Osaka Kansai Intl Airport, with prices starting at $370. Additional round-trip tickets that might be worth considering are offered by Asiana Airlines and United Airlines, with the lowest prices starting at $595 and $647, respectively. These flights start at 57% 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?

    $304 is the cheapest one-way deal found within the past few days, from Asiana Airlines. You may also be able to find cheap deals on Korean Air and Air Canada, with prices starting from $355 and $360, 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, 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 June is currently the most expensive (average of $984). 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
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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$370Average$438FlexibilityNo cancel feeOn-time75%
Asiana AirlinesCheapest$595Average$760FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$647Average$833FlexibilityNo cancel feeOn-time69%
ANACheapest$649Average$797FlexibilityNo cancel feeOn-time80%
Korean AirCheapest$660Average$803FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$669Average$802FlexibilityNo cancel feeOn-time67%
STARLUX AirlinesCheapest$934Average$1,381FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$975Average$1,218FlexibilityNo cancel feeOn-time74%

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