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Cheap flights from Seattle to Osaka from $307

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Osaka departing on 3/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
Asiana Airlines Logo
9:30 am - 2:55 pm
KIX
-
SEA
21h 25m
1 stop
$611Asiana Airlines
Tue, Apr 28 - Tue, May 12
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
Asiana Airlines Logo
9:30 am - 2:55 pm
KIX
-
SEA
21h 25m
1 stop
$614Asiana Airlines
Tue, Apr 28 - Mon, May 11
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
Asiana Airlines Logo
9:30 am - 2:55 pm
KIX
-
SEA
21h 25m
1 stop
$618Asiana Airlines
Tue, Apr 28 - Tue, May 12
Asiana Airlines Logo
12:55 am - 9:00 am
SEA
-
KIX
16h 05m
1 stop
Asiana Airlines Logo
7:45 pm - 2:55 pm
KIX
-
SEA
35h 10m
1 stop
$619Asiana Airlines
Tue, Apr 14 - Wed, Apr 22
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
Asiana Airlines Logo
10:40 am - 2:55 pm
KIX
-
SEA
20h 15m
1 stop
$626Asiana Airlines
Mon, Apr 27 - Tue, May 12
Asiana Airlines Logo
12:55 am - 9:00 am
SEA
-
KIX
16h 05m
1 stop
Asiana Airlines Logo
10:40 am - 2:55 pm
KIX
-
SEA
20h 15m
1 stop
$629Asiana Airlines
Mon, Apr 27 - Sun, May 10
Asiana Airlines Logo
12:55 am - 9:00 am
SEA
-
KIX
16h 05m
1 stop
Asiana Airlines Logo
7:45 pm - 2:55 pm
KIX
-
SEA
35h 10m
1 stop
$633Asiana Airlines
Sun, Apr 26 - Mon, May 11
Asiana Airlines Logo
12:55 am - 9:00 am
SEA
-
KIX
16h 05m
1 stop
Asiana Airlines Logo
10:40 am - 2:55 pm
KIX
-
SEA
20h 15m
1 stop
$634Asiana Airlines
Tue, Aug 25 - Thu, Sep 3
Asiana Airlines Logo
12:55 am - 6:30 pm
SEA
-
KIX
25h 35m
1 stop
Asiana Airlines Logo
10:40 am - 2:55 pm
KIX
-
SEA
20h 15m
1 stop
$636Asiana Airlines
Sun, Apr 26 - Sun, May 10
Philippine Airlines Logo
11:10 pm - 2:10 pm
SEA
-
KIX
23h 00m
1 stop
Philippine Airlines Logo
3:15 pm - 8:05 pm
KIX
-
SEA
20h 50m
1 stop
$637Philippine Airlines
Wed, Aug 26 - Wed, Sep 2

Philippine Airlines flights from Seattle to Osaka Kansai Intl Airport

Our best Philippine Airlines deals on Seattle to Osaka Kansai Intl Airport flight tickets
Philippine Airlines
Aug 26
SEA11:10 pmSeattle/Tacoma Intl
23h 00m
1 stop
KIX2:10 pmOsaka Kansai Intl
Sep 2
KIX3:15 pmOsaka Kansai Intl
20h 50m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$637
Philippine Airlines
Aug 25
SEA11:10 pmSeattle/Tacoma Intl
23h 00m
1 stop
KIX2:10 pmOsaka Kansai Intl
Sep 3
KIX3:15 pmOsaka Kansai Intl
20h 50m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$646
Philippine Airlines
Aug 23
SEA11:10 pmSeattle/Tacoma Intl
23h 00m
1 stop
KIX2:10 pmOsaka Kansai Intl
Sep 2
KIX10:25 amOsaka Kansai Intl
25h 40m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
$671

Air Canada flights from Seattle to Osaka Kansai Intl Airport

Our best Air Canada deals on Seattle to Osaka Kansai Intl Airport flight tickets
Air Canada
Apr 29
SEA5:40 amSeattle/Tacoma Intl
18h 45m
1 stop
KIX4:25 pmOsaka Kansai Intl
May 12
KIX6:00 pmOsaka Kansai Intl
12h 20m
1 stop
SEA2:20 pmSeattle/Tacoma Intl
$647
Air Canada
Apr 29
SEA10:20 amSeattle/Tacoma Intl
14h 05m
1 stop
KIX4:25 pmOsaka Kansai Intl
May 11
KIX6:00 pmOsaka Kansai Intl
20h 20m
1 stop
SEA10:20 pmSeattle/Tacoma Intl
$688
Air Canada
Apr 29
SEA5:40 amSeattle/Tacoma Intl
18h 45m
1 stop
KIX4:25 pmOsaka Kansai Intl
May 11
KIX6:00 pmOsaka Kansai Intl
20h 20m
1 stop
SEA10:20 pmSeattle/Tacoma Intl
$689

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Osaka Kansai Intl Airport 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, momondo users made 832,500 searches. Data last updated February 28, 2026.
Use the filters below to find and compare flights from Seattle to Osaka Kansai Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 4/28

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Tue 5/12

9:30 am-2:55 pm

1 stop21h 25m

$611

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 4/28

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Mon 5/11

9:30 am-2:55 pm

1 stop21h 25m

$614

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 4/28

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Tue 5/12

9:30 am-2:55 pm

1 stop21h 25m

$618

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 4/14

12:55 am-9:00 am

1 stop16h 05m

Osaka Kansai Intl

Wed 4/22

7:45 pm-2:55 pm

1 stop35h 10m

$619

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 4/27

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Tue 5/12

10:40 am-2:55 pm

1 stop20h 15m

$626

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 4/27

12:55 am-9:00 am

1 stop16h 05m

Osaka Kansai Intl

Sun 5/10

10:40 am-2:55 pm

1 stop20h 15m

$629

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/26

12:55 am-9:00 am

1 stop16h 05m

Osaka Kansai Intl

Mon 5/11

7:45 pm-2:55 pm

1 stop35h 10m

$633

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 8/25

12:55 am-9:00 am

1 stop16h 05m

Osaka Kansai Intl

Thu 9/3

10:40 am-2:55 pm

1 stop20h 15m

$634

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/26

12:55 am-6:30 pm

1 stop25h 35m

Osaka Kansai Intl

Sun 5/10

10:40 am-2:55 pm

1 stop20h 15m

$636

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 8/26

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Wed 9/2

3:15 pm-8:05 pm

1 stop20h 50m

$637

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

See travel insights to Osaka from

How to get the cheapest flight ticket from Seattle to Osaka Kansai Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Osaka Kansai Intl Airport?

In general, November is the cheapest month to fly from Seattle to Osaka Kansai Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $725. If you aren’t able to travel during the month of November, then book flights to Osaka Kansai Intl Airport from Seattle during February instead. Flights to Osaka Kansai Intl Airport in February, while not as cheap as those in November, still average around $742.

How far in advance should I book a flight to Osaka Kansai Intl Airport?

You are more likely to see cheaper flights to Osaka Kansai Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Osaka Kansai Intl Airport for around $834 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Osaka Kansai Intl Airport from Seattle for as low as $667 on momondo.

How have Seattle to Osaka Kansai Intl Airport flight prices changed over time?

As of February 2026, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 34% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Osaka Kansai Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Osaka Kansai Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Osaka Kansai Intl Airport (SEA to KIX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Osaka Kansai Intl Airport

Fastest flight time

15h 25m

Direct flights

None
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 15h 25m
There are no direct flights from Seattle to Osaka Kansai Intl Airport. There are no popular flight routes from Seattle to Osaka Kansai Intl Airport.
Search flight deals

  • How far is Seattle/Tacoma Intl to Osaka Kansai Intl by plane?

    The distance between Seattle/Tacoma Intl and Osaka Kansai Intl is about 5017.2 mi. By plane, this route typically takes 15h 25m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport were last updated today.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Osaka Kansai Intl Airport.

  • What documentation or ID do you need to fly to Osaka Kansai Intl Airport?

    The travel and health documents you'll need for your trip to Osaka Kansai Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Osaka Kansai Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Osaka Kansai Intl Airport?

Best airlines flying from Seattle to Osaka Kansai Intl Airport

Compare and see reviews for airlines that fly from Seattle to Osaka Kansai Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $370Free CancellationRating
8.0
11,968 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $595Free CancellationRating
8.1
502 reviews
Search Asiana Airlines flights
United AirlinesPriceFrom $647Free CancellationRating
7.4
9,365 reviews
Search United Airlines flights
ANAPriceFrom $649Free CancellationRating
8.4
1,105 reviews
Search ANA flights
Korean AirPriceFrom $660Free CancellationRating
8.4
1,195 reviews
Search Korean Air flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
10,757 reviews
Search Air Canada flights
STARLUX AirlinesPriceFrom $934Free CancellationRating
8.9
275 reviews
Search STARLUX Airlines flights

Traveling to a place near Osaka?

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

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Osaka?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Osaka for you.

Can I find flights from Seattle to Osaka with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Osaka flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Osaka?

momondo provides multiple filters to help you find the best flight to Osaka from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Osaka right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Seattle to Osaka flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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