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Cheap flights from Seattle to Osaka from $443

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 5/20. 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.
Delta Logo
1:05 pm - 8:45 pm
SEA
-
KIX
15h 40m
1 stop
Delta Logo
12:35 pm - 1:37 pm
KIX
-
SEA
17h 02m
1 stop
$874Delta
Sun, Aug 30 - Tue, Sep 8
Asiana Airlines Logo
12:10 am - 9:00 am
SEA
-
KIX
16h 50m
1 stop
Asiana Airlines Logo
10:30 am - 3:15 pm
KIX
-
SEA
20h 45m
1 stop
$875Asiana Airlines
Tue, Sep 1 - Tue, Sep 8
Asiana Airlines Logo
12:10 am - 9:00 am
SEA
-
KIX
16h 50m
1 stop
Asiana Airlines Logo
10:30 am - 3:15 pm
KIX
-
SEA
20h 45m
1 stop
$876Asiana Airlines
Mon, Aug 31 - Fri, Sep 11
Asiana Airlines Logo
12:10 am - 9:00 am
SEA
-
KIX
16h 50m
1 stop
Asiana Airlines Logo
9:30 am - 3:15 pm
KIX
-
SEA
21h 45m
1 stop
$877Asiana Airlines
Sun, Aug 30 - Fri, Sep 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
$879Hainan Airlines
Sat, Sep 5 - Fri, Sep 11
Asiana Airlines Logo
12:10 am - 9:00 am
SEA
-
KIX
16h 50m
1 stop
Asiana Airlines Logo
9:30 am - 3:15 pm
KIX
-
SEA
21h 45m
1 stop
$889Asiana Airlines
Sun, Aug 30 - Mon, Sep 7
Asiana Airlines Logo
12:10 am - 9:00 am
SEA
-
KIX
16h 50m
1 stop
Asiana Airlines Logo
10:30 am - 3:15 pm
KIX
-
SEA
20h 45m
1 stop
$891Asiana Airlines
Sun, Aug 30 - Mon, Sep 7
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
$892Philippine Airlines
Tue, Sep 1 - Wed, Sep 9
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
$893Philippine Airlines
Wed, Sep 9 - Wed, Sep 23
Delta Logo
1:05 pm - 8:45 pm
SEA
-
KIX
15h 40m
1 stop
Delta Logo
2:15 am - 1:37 pm
KIX
-
SEA
27h 22m
1 stop
$898Delta
Mon, Aug 31 - Sat, Sep 5

Delta flights from Seattle to Osaka Kansai Intl Airport

Our best Delta deals on Seattle to Osaka Kansai Intl Airport flight tickets
Delta
Aug 30
SEA1:05 pmSeattle/Tacoma Intl
15h 40m
1 stop
KIX8:45 pmOsaka Kansai Intl
Sep 8
KIX12:35 pmOsaka Kansai Intl
17h 02m
1 stop
SEA1:37 pmSeattle/Tacoma Intl
$874
Delta
Aug 31
SEA1:05 pmSeattle/Tacoma Intl
15h 40m
1 stop
KIX8:45 pmOsaka Kansai Intl
Sep 5
KIX2:15 amOsaka Kansai Intl
27h 22m
1 stop
SEA1:37 pmSeattle/Tacoma Intl
$898
Delta
Aug 30
SEA1:05 pmSeattle/Tacoma Intl
15h 40m
1 stop
KIX8:45 pmOsaka Kansai Intl
Sep 7
KIX12:35 pmOsaka Kansai Intl
17h 02m
1 stop
SEA1:37 pmSeattle/Tacoma Intl
$929

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
Sep 5
SEA11:00 amSeattle/Tacoma Intl
33h 45m
1 stop
KIX12:45 pmOsaka Kansai Intl
Sep 11
KIX2:20 pmOsaka Kansai Intl
34h 40m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$879
Hainan Airlines
Nov 7
SEA10:00 amSeattle/Tacoma Intl
33h 35m
1 stop
KIX12:35 pmOsaka Kansai Intl
Nov 16
KIX2:35 pmOsaka Kansai Intl
34h 25m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$915
Hainan Airlines
Nov 7
SEA10:00 amSeattle/Tacoma Intl
33h 35m
1 stop
KIX12:35 pmOsaka Kansai Intl
Nov 20
KIX2:35 pmOsaka Kansai Intl
34h 25m
1 stop
SEA8:00 amSeattle/Tacoma Intl
$916

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 May 12, 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

Sun 8/30

1:05 pm-8:45 pm

1 stop15h 40m

Osaka Kansai Intl

Tue 9/8

12:35 pm-1:37 pm

1 stop17h 02m

$874

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/1

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Tue 9/8

10:30 am-3:15 pm

1 stop20h 45m

$875

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 8/31

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Fri 9/11

10:30 am-3:15 pm

1 stop20h 45m

$876

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 8/30

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Fri 9/11

9:30 am-3:15 pm

1 stop21h 45m

$877

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/5

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Fri 9/11

2:20 pm-9:00 am

1 stop34h 40m

$879

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 8/30

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Mon 9/7

9:30 am-3:15 pm

1 stop21h 45m

$889

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 8/30

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Mon 9/7

10:30 am-3:15 pm

1 stop20h 45m

$891

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/1

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Wed 9/9

3:15 pm-8:05 pm

1 stop20h 50m

$892

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/9

11:10 pm-2:10 pm

1 stop23h 00m

Osaka Kansai Intl

Wed 9/23

10:25 am-8:05 pm

1 stop25h 40m

$893

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 8/31

1:05 pm-8:45 pm

1 stop15h 40m

Osaka Kansai Intl

Sat 9/5

2:15 am-1:37 pm

1 stop27h 22m

$898

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 $685. If you aren’t able to travel during the month of November, then book flights to Osaka Kansai Intl Airport from Seattle during April instead. Flights to Osaka Kansai Intl Airport in April, while not as cheap as those in November, still average around $702.

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 $845 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 $715 on momondo.

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

As of May 2026, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 26% 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

13h 20m

Direct flights

None
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 13h 20m
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 13h 20m.

  • 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
12,354 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
532 reviews
Search Asiana Airlines flights
ANAPriceFrom $650Free CancellationRating
8.3
1,208 reviews
Search ANA flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
11,026 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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