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Cheap flights from Seattle to Osaka from $218

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Osaka departing on 9/14. 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.
Air Canada Logo
5:50 am - 4:25 pm
SEA
-
KIX
18h 35m
1 stop
Air Canada Logo
6:00 pm - 10:05 am
KIX
-
SEA
32h 05m
1 stop
$218Air Canada
Mon, Sep 14 - Mon, Sep 28
Cathay Pacific Logo
11:50 am - 5:40 pm
SEA
-
KIX
37h 50m
1 stop
Cathay Pacific Logo
7:05 pm - 9:10 am
KIX
-
SEA
31h 05m
1 stop
$815Cathay Pacific
Tue, Oct 27 - Mon, Nov 9
Cathay Pacific Logo
10:50 am - 5:40 pm
SEA
-
KIX
37h 50m
1 stop
Cathay Pacific Logo
6:05 pm - 9:10 am
KIX
-
SEA
32h 05m
1 stop
$818Cathay Pacific
Mon, Nov 9 - Tue, Nov 17
Cathay Pacific Logo
10:50 am - 5:40 pm
SEA
-
KIX
37h 50m
1 stop
Cathay Pacific Logo
7:05 pm - 9:10 am
KIX
-
SEA
31h 05m
1 stop
$818Cathay Pacific
Tue, Nov 10 - Wed, Nov 18
Air Canada Logo
10:10 am - 5:40 pm
SEA
-
KIX
14h 30m
1 stop
Air Canada Logo
7:25 pm - 9:57 pm
KIX
-
SEA
19h 32m
1 stop
$892Air Canada
Wed, Nov 4 - Tue, Nov 17
Air Canada Logo
8:40 am - 5:40 pm
SEA
-
KIX
16h 00m
1 stop
Air Canada Logo
7:25 pm - 2:37 pm
KIX
-
SEA
12h 12m
1 stop
$892Air Canada
Wed, Nov 4 - Tue, Nov 17
Asiana Airlines Logo
12:10 am - 9:35 pm
SEA
-
KIX
29h 25m
1 stop
Asiana Airlines Logo
7:45 pm - 3:15 pm
KIX
-
SEA
35h 30m
1 stop
$1,067Asiana Airlines
Tue, Oct 13 - Thu, Oct 22
Asiana Airlines Logo
12:10 am - 9:40 am
SEA
-
KIX
16h 30m
1 stop
Asiana Airlines Logo
8:20 pm - 1:55 pm
KIX
-
SEA
34h 35m
1 stop
$1,067Asiana Airlines
Tue, Nov 10 - Wed, Nov 18
ANA Logo
7:00 am - 2:50 pm
SEA
-
KIX
15h 50m
1 stop
ANA Logo
4:55 pm - 11:26 pm
KIX
-
SEA
22h 31m
1 stop
$1,080ANA
Fri, Aug 14 - Fri, Aug 21
ANA Logo
7:00 am - 2:50 pm
SEA
-
KIX
15h 50m
1 stop
ANA Logo
7:00 am - 11:26 pm
KIX
-
SEA
32h 26m
2 stops
$1,082ANA
Fri, Aug 14 - Fri, Aug 21

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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
Oct 27
SEA11:50 amSeattle/Tacoma Intl
37h 50m
1 stop
KIX5:40 pmOsaka Kansai Intl
Nov 9
KIX7:05 pmOsaka Kansai Intl
31h 05m
1 stop
SEA9:10 amSeattle/Tacoma Intl
$815
Cathay Pacific
Nov 9
SEA10:50 amSeattle/Tacoma Intl
37h 50m
1 stop
KIX5:40 pmOsaka Kansai Intl
Nov 24
KIX10:00 amOsaka Kansai Intl
40h 10m
1 stop
SEA9:10 amSeattle/Tacoma Intl
$818
Cathay Pacific
Nov 3
SEA10:50 amSeattle/Tacoma Intl
37h 50m
1 stop
KIX5:40 pmOsaka Kansai Intl
Nov 16
KIX10:00 amOsaka Kansai Intl
40h 10m
1 stop
SEA9:10 amSeattle/Tacoma Intl
$824

China Airlines flights from Seattle to Osaka Kansai Intl Airport

Our best China Airlines deals on Seattle to Osaka Kansai Intl Airport flight tickets
China Airlines
Oct 3
SEA1:15 amSeattle/Tacoma Intl
19h 35m
1 stop
KIX12:50 pmOsaka Kansai Intl
Oct 17
KIX1:10 pmOsaka Kansai Intl
22h 05m
1 stop
SEA7:15 pmSeattle/Tacoma Intl
$937
China Airlines
Aug 31
SEA1:55 amSeattle/Tacoma Intl
18h 05m
1 stop
KIX12:00 pmOsaka Kansai Intl
Sep 8
KIX7:05 pmOsaka Kansai Intl
16h 40m
1 stop
SEA7:45 pmSeattle/Tacoma Intl
$938
China Airlines
Aug 3
SEA1:55 amSeattle/Tacoma Intl
18h 55m
1 stop
KIX12:50 pmOsaka Kansai Intl
Aug 25
KIX7:05 pmOsaka Kansai Intl
16h 40m
1 stop
SEA7:45 pmSeattle/Tacoma Intl
$988

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 August 1, 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

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 9/14

5:50 am-4:25 pm

1 stop18h 35m

Osaka Kansai Intl

Mon 9/28

6:00 pm-10:05 am

1 stop32h 05m

$218

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 10/27

11:50 am-5:40 pm

1 stop37h 50m

Osaka Kansai Intl

Mon 11/9

7:05 pm-9:10 am

1 stop31h 05m

$815

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 11/9

10:50 am-5:40 pm

1 stop37h 50m

Osaka Kansai Intl

Tue 11/17

6:05 pm-9:10 am

1 stop32h 05m

$818

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 11/10

10:50 am-5:40 pm

1 stop37h 50m

Osaka Kansai Intl

Wed 11/18

7:05 pm-9:10 am

1 stop31h 05m

$818

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 11/4

10:10 am-5:40 pm

1 stop14h 30m

Osaka Kansai Intl

Tue 11/17

7:25 pm-9:57 pm

1 stop19h 32m

$892
Quickest round-trip

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 11/4

8:40 am-5:40 pm

1 stop16h 00m

Osaka Kansai Intl

Tue 11/17

7:25 pm-2:37 pm

1 stop12h 12m

$892

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 10/13

12:10 am-9:35 pm

1 stop29h 25m

Osaka Kansai Intl

Thu 10/22

7:45 pm-3:15 pm

1 stop35h 30m

$1,067

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 11/10

12:10 am-9:40 am

1 stop16h 30m

Osaka Kansai Intl

Wed 11/18

8:20 pm-1:55 pm

1 stop34h 35m

$1,067

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Fri 8/14

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Fri 8/21

4:55 pm-11:26 pm

1 stop22h 31m

$1,080

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Fri 8/14

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Fri 8/21

7:00 am-11:26 pm

2 stops32h 26m

$1,082

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 typical price of a round-trip flight between Seattle and Osaka Kansai Intl Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $835 to $1,090.
The lowest price recently found on this route was $218.

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 August 2026, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 25% 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

16h 50m

Direct flights

None
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 16h 50m
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 16h 50m.

  • 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
12,743 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
555 reviews
Search Asiana Airlines flights
ANAPriceFrom $648Free CancellationRating
8.3
1,288 reviews
Search ANA flights
Air CanadaPriceFrom $664Free CancellationRating
7.1
11,415 reviews
Search Air Canada flights

Traveling to a place near Osaka?

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