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Cheap flights from Seattle to Osaka from $436

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 11/14. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Osaka

Cheap round-trip flights

Enter your travel dates to find the best prices.
Philippine Airlines Logo
11:10 pm - 2:10 pm
SEA
-
KIX
23h 00m
1 stop
Philippine Airlines Logo
10:25 am - 8:05 pm
KIX
-
SEA
25h 40m
1 stop
$840Philippine Airlines
Fri, Sep 11 - Sun, Oct 11
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$845Hainan Airlines
Sat, Aug 22 - Mon, Aug 31
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$848Hainan Airlines
Sat, Aug 22 - Mon, Aug 31
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$854Hainan Airlines
Sat, Sep 12 - Mon, Oct 12
Philippine Airlines Logo
11:55 pm - 7:35 pm
SEA
-
KIX
26h 40m
1 stop
Philippine Airlines Logo
10:25 am - 7:35 pm
KIX
-
SEA
26h 10m
1 stop
$884Philippine Airlines
Mon, Nov 30 - Sun, Feb 21
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$905Hainan Airlines
Sat, Sep 5 - Fri, Oct 23
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$915Hainan Airlines
Sat, Sep 12 - Mon, Sep 28
Philippine Airlines Logo
11:10 pm - 7:35 pm
SEA
-
KIX
28h 25m
1 stop
Philippine Airlines Logo
3:15 pm - 8:05 pm
KIX
-
SEA
20h 50m
1 stop
$926Philippine Airlines
Wed, Sep 2 - Wed, Sep 16
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:20 pm - 9:00 am
KIX
-
SEA
34h 40m
1 stop
$928Hainan Airlines
Sat, Sep 12 - Mon, Oct 12
Hainan Airlines Logo
11:00 am - 12:45 pm
SEA
-
KIX
33h 45m
1 stop
Hainan Airlines Logo
2:35 pm - 8:00 am
KIX
-
SEA
34h 25m
1 stop
$945Hainan Airlines
Sat, Oct 10 - Mon, Nov 30

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Hainan Airlines flights from Seattle to Osaka Kansai Intl Airport

Our best Hainan Airlines deals on Seattle to Osaka Kansai Intl Airport flight tickets
Hainan Airlines
Aug 22
SEA11:00 amSeattle/Tacoma Intl
33h 45m
1 stop
KIX12:45 pmOsaka Kansai Intl
Aug 31
KIX2:20 pmOsaka Kansai Intl
34h 40m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$845
Hainan Airlines
Aug 22
SEA11:00 amSeattle/Tacoma Intl
33h 45m
1 stop
KIX12:45 pmOsaka Kansai Intl
Aug 31
KIX2:20 pmOsaka Kansai Intl
34h 40m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$848
Hainan Airlines
Sep 12
SEA11:00 amSeattle/Tacoma Intl
33h 45m
1 stop
KIX12:45 pmOsaka Kansai Intl
Oct 12
KIX2:20 pmOsaka Kansai Intl
34h 40m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$854

Cathay Pacific flights from Seattle to Osaka Kansai Intl Airport

Our best Cathay Pacific deals on Seattle to Osaka Kansai Intl Airport flight tickets
Cathay Pacific
Oct 20
SEA11:45 amSeattle/Tacoma Intl
26h 55m
1 stop
KIX6:40 amOsaka Kansai Intl
Nov 1
KIX4:55 pmOsaka Kansai Intl
33h 15m
1 stop
SEA10:10 amSeattle/Tacoma Intl
$986
Cathay Pacific
Sep 14
SEA12:25 pmSeattle/Tacoma Intl
26h 15m
1 stop
KIX6:40 amOsaka Kansai Intl
Sep 27
KIX5:35 pmOsaka Kansai Intl
32h 30m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$1,006
Cathay Pacific
Sep 22
SEA5:44 pmSeattle/Tacoma Intl
27h 11m
2 stops
KIX12:55 pmOsaka Kansai Intl
Oct 4
KIX5:35 pmOsaka Kansai Intl
32h 30m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$1,018

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 June 20, 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

Cheapest round-trip
Quickest round-trip

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Fri 9/11

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Sun 10/11

10:25 am-8:05 pm

1 stop25h 40m

$840

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 8/22

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Mon 8/31

2:20 pm-9:00 am

1 stop34h 40m

$845

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 8/22

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Mon 8/31

2:20 pm-9:00 am

1 stop34h 40m

$848

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/12

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Mon 10/12

2:20 pm-9:00 am

1 stop34h 40m

$854

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 11/30

11:55 pm-7:35 pm

1 stop26h 40m

Osaka Kansai Intl

Sun 2/21

10:25 am-7:35 pm

1 stop26h 10m

$884

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/5

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Fri 10/23

2:20 pm-9:00 am

1 stop34h 40m

$905

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/12

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Mon 9/28

2:20 pm-9:00 am

1 stop34h 40m

$915

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/2

11:10 pm-7:35 pm

1 stop28h 25m

Osaka Kansai Intl

Wed 9/16

3:15 pm-8:05 pm

1 stop20h 50m

$926

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/12

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Mon 10/12

2:20 pm-9:00 am

1 stop34h 40m

$928

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 10/10

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Mon 11/30

2:35 pm-8:00 am

1 stop34h 25m

$945

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between Seattle and Osaka Kansai Intl Airport?

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 $681. 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 $700.

How far in advance should I book a flight from Seattle 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 $828 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 $650 on momondo.

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

As of June 2026, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 37% 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

18h 45m

Direct flights

None
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 18h 45m
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

Frequently asked questions about flying from Seattle to Osaka Kansai Intl Airport

  • 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 18h 45m.

  • 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
7.9
12,550 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
545 reviews
Search Asiana Airlines flights
ANAPriceFrom $649Free CancellationRating
8.3
1,248 reviews
Search ANA flights
Air CanadaPriceFrom $664Free CancellationRating
7.1
11,229 reviews
Search Air Canada flights

Traveling to a place near Osaka?

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