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Kansai Intl

$321+ 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 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KIX
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
1 adult, Economy
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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 January 7, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$608
(Air Canada)

One-way from

$321
(SmartFares)

Popular in

June

Cheapest in

February

Average price

$796
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. 16% potential increase in price ($166 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 7, 2026.

This Air Canada deal was found by Cheapflights users on 1/6. 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.
Sun 1/185:50 amSEA - KIX
2 stops21h 45mMultiple Airlines
Tue 1/2710:50 amKIX - SEA
2 stops25h 26mMultiple Airlines
Deal found 1/6$608
This CrystalTravel deal was found by Cheapflights users on 1/6. 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 4/612:55 amSEA - KIX
1 stop28h 00mAsiana Airlines
Tue 4/219:10 amKIX - SEA
1 stop21h 45mAsiana Airlines
Deal found 1/6$616
This CrystalTravel deal was found by Cheapflights users on 1/6. 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.
Sat 1/3112:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Sat 2/710:30 amKIX - SEA
1 stop20h 25mAsiana Airlines
Deal found 1/6$625
This Gotogate deal was found by Cheapflights users on 1/5. 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 2/310:05 amSEA - KIX
2 stops29h 40mMultiple Airlines
Tue 2/108:00 amKIX - SEA
2 stops28h 16mMultiple Airlines
Deal found 1/5$626
This CrystalTravel deal was found by Cheapflights users on 1/5. 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 4/1212:10 amSEA - KIX
1 stop17h 30mAsiana Airlines
Mon 4/2710:50 amKIX - SEA
1 stop20h 05mAsiana Airlines
Deal found 1/5$628
This oojo deal was found by Cheapflights users on 1/7. 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 2/2312:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Tue 3/177:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 1/7$629
This FlightHub deal was found by Cheapflights users on 1/4. 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 2/112:10 amSEA - KIX
1 stop24h 55mAsiana Airlines
Mon 2/99:00 amKIX - SEA
1 stop21h 55mAsiana Airlines
Deal found 1/4$630
This FlightHub deal was found by Cheapflights users on 1/4. 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 3/112:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Wed 3/1810:30 amKIX - SEA
1 stop20h 25mAsiana Airlines
Deal found 1/4$631
This SmartFares deal was found by Cheapflights users on 1/6. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/212:10 amSEA - KIX
1 stop15h 40mAsiana Airlines
Tue 2/107:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 1/6$634
This oojo deal was found by Cheapflights users on 1/6. 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 2/312:30 pmSEA - KIX
1 stop26h 55mJapan Airlines
Tue 2/107:00 amKIX - SEA
1 stop19h 55mJapan Airlines
Deal found 1/6$636
This FlightHub deal was found by Cheapflights users on 1/6. 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 9/1312:55 amSEA - KIX
1 stop28h 00mAsiana Airlines
Wed 9/307:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Deal found 1/6$637
This oojo deal was found by Cheapflights users on 1/6. 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 1/2012:30 pmSEA - KIX
1 stop27h 15mJapan Airlines
Tue 1/2710:50 amKIX - SEA
2 stops39h 08mJapan Airlines
Deal found 1/6$638

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 January 7, 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 1/23

11:00 am-8:45 pm

1 stop16h 45m

Osaka Kansai Intl

Mon 2/2

11:55 am-9:00 am

1 stop14h 05m

$658

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 4/21

7:12 am-2:50 pm

1 stop15h 38m

Osaka Kansai Intl

Wed 5/13

8:30 am-6:34 pm

2 stops26h 04m

$666

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Fri 1/23

11:00 am-8:45 pm

1 stop16h 45m

Osaka Kansai Intl

Fri 2/6

9:00 am-9:00 am

1 stop17h 00m

$666

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 1/24

7:15 am-8:45 pm

2 stops20h 30m

Osaka Kansai Intl

Thu 2/5

6:10 pm-9:00 am

1 stop31h 50m

$671

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 3/4

12:10 am-6:05 pm

1 stop24h 55m

Osaka Kansai Intl

Fri 3/20

10:30 am-2:55 pm

1 stop20h 25m

$673

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/5

12:55 am-8:55 pm

1 stop28h 00m

Osaka Kansai Intl

Wed 4/15

7:25 pm-2:55 pm

1 stop35h 30m

$673

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 2/28

12:10 am-8:55 pm

1 stop27h 45m

Osaka Kansai Intl

Wed 3/18

10:30 am-2:55 pm

1 stop20h 25m

$673

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 1/24

5:12 pm-4:40 pm

2 stops30h 28m

Osaka Kansai Intl

Fri 2/6

6:35 pm-11:16 pm

2 stops21h 41m

$674

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 1/25

7:15 am-8:45 pm

2 stops20h 30m

Osaka Kansai Intl

Tue 2/3

9:00 am-9:00 am

1 stop17h 00m

$678

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 1/21

7:15 am-8:45 pm

2 stops20h 30m

Osaka Kansai Intl

Thu 2/5

6:10 pm-9:00 am

1 stop31h 50m

$678

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

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 January.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 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 January 2, 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.

How much does it cost to fly round-trip from Seattle to Osaka Kansai Intl Airport?

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 January 7, 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
256 reviews

Food

8.7

Overall

8.9

Crew

9.1

Comfort

8.8

Entertainment

8.8

Boarding

8.9

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
256 reviews
STARLUX Airlines
8.9
Very good
256 reviews

Food

8.7

Overall

8.9

Crew

9.1

Comfort

8.8

Entertainment

8.8

Boarding

8.9

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
1,061 reviews
STARLUX Airlines
8.9
Very good
256 reviews

Food

8.7

Overall

8.9

Crew

9.1

Comfort

8.8

Entertainment

8.8

Boarding

8.9

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
8.2
Very good
500 reviews
STARLUX Airlines
8.9
Very good
256 reviews

Food

8.7

Overall

8.9

Crew

9.1

Comfort

8.8

Entertainment

8.8

Boarding

8.9

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
11,661 reviews
STARLUX Airlines
8.9
Very good
256 reviews

Food

8.7

Overall

8.9

Crew

9.1

Comfort

8.8

Entertainment

8.8

Boarding

8.9

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
10,604 reviews
STARLUX Airlines
8.9
Very good
256 reviews

Food

8.7

Overall

8.9

Crew

9.1

Comfort

8.8

Entertainment

8.8

Boarding

8.9

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. 9 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?

    Korean Air 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 1h 07m. 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 9 airlines flying from Seattle to Kansai Intl

Discover the top 9 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 January 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$370Average$438FlexibilityNo cancel feeOn-time75%
Asiana AirlinesCheapest$595Average$754FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$647Average$837FlexibilityNo cancel feeOn-time69%
ANACheapest$650Average$807FlexibilityNo cancel feeOn-time80%
Korean AirCheapest$660Average$846FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$669Average$802FlexibilityNo cancel feeOn-time67%
STARLUX AirlinesCheapest$934Average$1,267FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$975Average$1,218FlexibilityNo cancel feeOn-time74%
China AirlinesCheapest$1,056Average$1,167FlexibilityNo cancel feeOn-time70%

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