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Kansai Intl

$353+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — KIX
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Osaka Kansai Intl are usually found in February or September, booked 20 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 July 2, 2025.

Round-trip from

$687
(CrystalTravel)

One-way from

$353
(oojo)

Popular in

December

Cheapest in

February

Average price

$1,061
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. 9% potential increase in price ($107 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 2, 2025.

This CrystalTravel deal was found by Cheapflights users on 6/30. 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 9/112:50 pmSEA - KIX
1 stop16h 10mKorean Air
Wed 9/1012:35 pmKIX - SEA
1 stop14h 05mKorean Air
Deal found 6/30$687
This oojo deal was found by Cheapflights users on 6/30. 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 7/142:30 pmSEA - KIX
1 stop14h 35mAsiana Airlines
Fri 7/2510:50 amKIX - SEA
1 stop17h 55mAsiana Airlines
Deal found 6/30$691
This CrystalTravel deal was found by Cheapflights users on 6/30. 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.
Tue 11/183:40 pmSEA - KIX
1 stop24h 10mANA
Wed 12/35:35 pmKIX - SEA
1 stop12h 45mANA
Deal found 6/30$694
This Air Canada deal was found by Cheapflights users on 6/30. 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 11/25:50 amSEA - KIX
1 stop18h 50mAir Canada
Mon 11/177:25 pmKIX - SEA
1 stop12h 01mAir Canada
Deal found 6/30$707
This Cheapflightsfares deal was found by Cheapflights users on 7/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/811:35 pmSEA - KIX
1 stop22h 45mPhilippine Airlines
Wed 11/129:55 amKIX - SEA
1 stop26h 40mPhilippine Airlines
Deal found 7/2$716
This Trip.com deal was found by Cheapflights users on 6/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/812:45 pmSEA - KIX
1 stop28h 55mMultiple Airlines
Tue 8/510:50 amKIX - SEA
1 stop16h 00mMultiple Airlines
Deal found 6/30$742
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/87:00 amSEA - KIX
1 stop15h 50mUnited Airlines
Fri 7/184:55 pmKIX - SEA
2 stops21h 21mUnited Airlines
Deal found 6/30$749

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 July 2, 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 9/1

12:50 pm-9:00 pm

1 stop16h 10m

Osaka Kansai Intl

Wed 9/10

12:35 pm-10:40 am

1 stop14h 05m

$687

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 7/14

2:30 pm-9:05 pm

1 stop14h 35m

Osaka Kansai Intl

Fri 7/25

10:50 am-12:45 pm

1 stop17h 55m

$691

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 7/8

7:00 am-5:55 pm

2 stops18h 55m

Osaka Kansai Intl

Wed 7/16

5:30 pm-2:25 pm

1 stop12h 55m

$732

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 7/8

12:45 pm-9:40 am

1 stop28h 55m

Osaka Kansai Intl

Tue 8/5

10:50 am-10:50 am

1 stop16h 00m

$742

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 7/8

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Fri 7/18

4:55 pm-10:16 pm

2 stops21h 21m

$749

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 7/28

6:40 am-9:00 pm

2 stops22h 20m

Osaka Kansai Intl

Mon 8/4

12:35 pm-10:50 am

1 stop14h 15m

$771

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 8/16

2:30 pm-5:50 pm

1 stop35h 20m

$353

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 8/20

1:20 pm-9:00 pm

1 stop15h 40m

$373

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 8/23

5:35 pm-3:20 pm

2 stops29h 45m

$428

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 7/19

10:00 am-7:30 pm

2 stops17h 30m

$449

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 15 results
1
2

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 June 27, 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 19 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 $884). Flying from Seattle to Osaka Kansai Intl Airport in June is currently the most expensive (average of $1,319). 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 July 2, 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 July 2, 2025.
See what other customers who have flown with STARLUX Airlines, EVA Air, 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
9.1
Wonderful
189 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Crew

9.3

Comfort

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.1
Wonderful
189 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Crew

9.3

Comfort

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,214 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Crew

9.3

Comfort

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,101 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Crew

9.3

Comfort

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
ANA
8.4
Very good
892 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Crew

9.3

Comfort

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
China Airlines
8.3
Very good
747 reviews
STARLUX Airlines
9.1
Wonderful
189 reviews

Entertainment

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Crew

9.3

Comfort

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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.

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

    Flying on Korean Air is currently your cheapest option to Osaka Kansai Intl Airport, with prices starting at $687. Additional round-trip tickets that might be worth considering are offered by Asiana Airlines and ANA, with the lowest prices starting at $691 and $732, respectively. These flights start at 33% 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?

    $353 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 ANA, with prices starting from $373 and $428, 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 $884). Flying from Seattle to Osaka Kansai Intl Airport in June is currently the most expensive (average of $1,319). 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

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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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$648Average$901FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$669Average$1,041FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$716Average$1,133FlexibilityNo cancel feeOn-time81%
China EasternCheapest$719Average$756FlexibilityNo cancel feeOn-time62%
ANACheapest$746Average$1,065FlexibilityNo cancel feeOn-time80%
United AirlinesCheapest$797Average$905FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$856Average$1,479FlexibilityNo cancel feeOn-time85%
STARLUX AirlinesCheapest$918Average$1,105FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$963Average$1,159FlexibilityNo cancel feeOn-time74%
China AirlinesCheapest$999Average$1,186FlexibilityNo cancel feeOn-time70%

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