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Cheap flights from Seattle to Osaka from $372

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 8/21. 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.
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
9:05 am - 10:05 am
KIX
-
SEA
17h 00m
1 stop
$818Cathay Pacific
Wed, Sep 9 - Thu, Oct 22
Cathay Pacific Logo
12:25 pm - 2:50 pm
SEA
-
KIX
34h 25m
2 stops
Cathay Pacific Logo
9:05 am - 10:05 am
KIX
-
SEA
17h 00m
1 stop
$833Cathay Pacific
Wed, Sep 9 - Wed, Oct 21
Cathay Pacific Logo
12:25 pm - 2:50 pm
SEA
-
KIX
34h 25m
2 stops
Cathay Pacific Logo
6:05 pm - 9:10 am
KIX
-
SEA
32h 05m
1 stop
$834Cathay Pacific
Thu, Aug 27 - Tue, Dec 22
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
$839Hainan Airlines
Sat, Aug 8 - 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
$849Hainan 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
$873Hainan Airlines
Sat, Aug 22 - Fri, Sep 4
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
9:05 am - 10:05 am
KIX
-
SEA
17h 00m
1 stop
$893Cathay Pacific
Tue, Sep 8 - Wed, Oct 21
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
7:25 pm - 10:20 am
KIX
-
SEA
30h 55m
1 stop
$897Cathay Pacific
Tue, Sep 1 - Tue, Sep 8
Cathay Pacific Logo
12:25 pm - 6:40 am
SEA
-
KIX
26h 15m
1 stop
Cathay Pacific Logo
9:05 am - 10:05 am
KIX
-
SEA
17h 00m
1 stop
$905Cathay Pacific
Wed, Sep 9 - Wed, Sep 23
Cathay Pacific Logo
12:25 pm - 2:50 pm
SEA
-
KIX
34h 25m
2 stops
Cathay Pacific Logo
9:05 am - 10:05 am
KIX
-
SEA
17h 00m
1 stop
$908Cathay Pacific
Wed, Sep 9 - Wed, Sep 16

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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
Sep 9
SEA12:25 pmSeattle/Tacoma Intl
26h 15m
1 stop
KIX6:40 amOsaka Kansai Intl
Oct 22
KIX9:05 amOsaka Kansai Intl
17h 00m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$818
Cathay Pacific
Sep 9
SEA12:25 pmSeattle/Tacoma Intl
34h 25m
2 stops
KIX2:50 pmOsaka Kansai Intl
Oct 21
KIX9:05 amOsaka Kansai Intl
17h 00m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$833
Cathay Pacific
Sep 8
SEA12:25 pmSeattle/Tacoma Intl
26h 15m
1 stop
KIX6:40 amOsaka Kansai Intl
Oct 21
KIX9:05 amOsaka Kansai Intl
17h 00m
1 stop
SEA10:05 amSeattle/Tacoma Intl
$893

United Airlines flights from Seattle to Osaka Kansai Intl Airport

Our best United Airlines deals on Seattle to Osaka Kansai Intl Airport flight tickets
United Airlines
Aug 1
SEA10:29 amSeattle/Tacoma Intl
36h 21m
1 stop
KIX2:50 pmOsaka Kansai Intl
Aug 6
KIX4:55 pmOsaka Kansai Intl
21h 04m
2 stops
SEA9:59 pmSeattle/Tacoma Intl
$1,223
United Airlines
Aug 4
SEA5:15 amSeattle/Tacoma Intl
17h 35m
1 stop
KIX2:50 pmOsaka Kansai Intl
Aug 22
KIX4:55 pmOsaka Kansai Intl
18h 19m
2 stops
SEA7:14 pmSeattle/Tacoma Intl
$1,268
United Airlines
Jul 25
SEA1:30 pmSeattle/Tacoma Intl
33h 20m
1 stop
KIX2:50 pmOsaka Kansai Intl
Aug 1
KIX4:55 pmOsaka Kansai Intl
18h 43m
2 stops
SEA7:38 pmSeattle/Tacoma Intl
$1,273

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 July 21, 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

Wed 9/9

12:25 pm-6:40 am

1 stop26h 15m

Osaka Kansai Intl

Thu 10/22

9:05 am-10:05 am

1 stop17h 00m

$818

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/9

12:25 pm-2:50 pm

2 stops34h 25m

Osaka Kansai Intl

Wed 10/21

9:05 am-10:05 am

1 stop17h 00m

$833

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 8/27

12:25 pm-2:50 pm

2 stops34h 25m

Osaka Kansai Intl

Tue 12/22

6:05 pm-9:10 am

1 stop32h 05m

$834

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 8/8

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Mon 8/31

2:20 pm-9:00 am

1 stop34h 40m

$839

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

$849

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 8/22

11:00 am-12:45 pm

1 stop33h 45m

Osaka Kansai Intl

Fri 9/4

2:20 pm-9:00 am

1 stop34h 40m

$873

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/8

12:25 pm-6:40 am

1 stop26h 15m

Osaka Kansai Intl

Wed 10/21

9:05 am-10:05 am

1 stop17h 00m

$893

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 9/1

12:25 pm-6:40 am

1 stop26h 15m

Osaka Kansai Intl

Tue 9/8

7:25 pm-10:20 am

1 stop30h 55m

$897

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/9

12:25 pm-6:40 am

1 stop26h 15m

Osaka Kansai Intl

Wed 9/23

9:05 am-10:05 am

1 stop17h 00m

$905

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/9

12:25 pm-2:50 pm

2 stops34h 25m

Osaka Kansai Intl

Wed 9/16

9:05 am-10:05 am

1 stop17h 00m

$908

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, February 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 $671. If you aren’t able to travel during the month of February, then book flights to Osaka Kansai Intl Airport from Seattle during November instead. Flights to Osaka Kansai Intl Airport in November, while not as cheap as those in February, still average around $681.

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 $859 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 July 2026, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 28% 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

24h 32m

Direct flights

None
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 24h 32m
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 24h 32m.

  • 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
12,687 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
553 reviews
Search Asiana Airlines flights
ANAPriceFrom $648Free CancellationRating
8.3
1,274 reviews
Search ANA flights
Air CanadaPriceFrom $664Free CancellationRating
7.1
11,369 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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