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Cheap flights from Seattle to Osaka from $323

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 1/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
ANA Logo
6:03 am - 4:40 pmSEA-KIX
17h 37m1 stop
ANA Logo
5:35 pm - 1:20 pmKIX-SEA
12h 45m1 stop
$617ANA
Find Deal
Fri, Jan 16 - Sat, Jan 24
ANA Logo
3:45 pm - 10:20 pmSEA-KIX
13h 35m1 stop
ANA Logo
8:20 am - 1:20 pmKIX-SEA
22h 00m1 stop
$619ANA
Find Deal
Sat, Feb 7 - Sat, Feb 14
ANA Logo
6:18 am - 4:40 pmSEA-KIX
17h 22m1 stop
ANA Logo
5:35 pm - 1:20 pmKIX-SEA
12h 45m1 stop
$621ANA
Find Deal
Sun, Jan 11 - Sun, Jan 18
Korean Air Logo
11:00 am - 12:50 pmSEA-KIX
32h 50m1 stop
Korean Air Logo
11:55 am - 9:00 amKIX-SEA
14h 05m1 stop
$627Korean Air
Find Deal
Sat, Jan 24 - Sun, Feb 1
Korean Air Logo
11:00 am - 10:45 amSEA-KIX
30h 45m1 stop
Korean Air Logo
11:55 am - 9:00 amKIX-SEA
14h 05m1 stop
$629Korean Air
Find Deal
Fri, Jan 16 - Sat, Jan 24
Multiple Airlines Logo
11:00 am - 8:45 pmSEA-KIX
16h 45m1 stop
Multiple Airlines Logo
10:30 am - 9:00 amKIX-SEA
15h 30m1 stop
$648Multiple Airlines
Find Deal
Tue, Dec 2 - Wed, Dec 10
United Airlines Logo
6:03 am - 4:40 pmSEA-KIX
17h 37m1 stop
United Airlines Logo
8:20 am - 9:12 pmKIX-SEA
29h 52m3 stops
$657United Airlines
Find Deal
Fri, Jan 16 - Sat, Jan 24
Asiana Airlines Logo
12:10 am - 8:40 amSEA-KIX
15h 30m1 stop
Asiana Airlines Logo
9:00 am - 1:55 pmKIX-SEA
21h 55m1 stop
$658Asiana Airlines
Find Deal
Sat, Nov 8 - Tue, Nov 18
Asiana Airlines Logo
12:10 am - 6:05 pmSEA-KIX
24h 55m1 stop
Asiana Airlines Logo
9:00 am - 1:55 pmKIX-SEA
21h 55m1 stop
$667Asiana Airlines
Find Deal
Sat, Jan 17 - Mon, Jan 26
United Airlines Logo
6:35 am - 2:50 pmSEA-KIX
16h 15m1 stop
United Airlines Logo
8:30 am - 2:25 pmKIX-SEA
21h 55m1 stop
$670United Airlines
Find Deal
Sun, Apr 19 - Fri, May 15

ANA flights from Seattle to Osaka Kansai Intl Airport

Our best ANA deals on Seattle to Osaka Kansai Intl Airport flight tickets
ANA
Jan 16
SEA6:03 amSeattle/Tacoma Intl
17h 37m
1 stop
KIX4:40 pmOsaka Kansai Intl
Jan 24
KIX5:35 pmOsaka Kansai Intl
12h 45m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$617
Find similar
ANA
Feb 7
SEA3:45 pmSeattle/Tacoma Intl
13h 35m
1 stop
KIX10:20 pmOsaka Kansai Intl
Feb 14
KIX8:20 amOsaka Kansai Intl
22h 00m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$619
Find similar
ANA
Jan 11
SEA6:18 amSeattle/Tacoma Intl
17h 22m
1 stop
KIX4:40 pmOsaka Kansai Intl
Jan 18
KIX5:35 pmOsaka Kansai Intl
12h 45m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$621
Find similar

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
Jan 16
SEA6:03 amSeattle/Tacoma Intl
17h 37m
1 stop
KIX4:40 pmOsaka Kansai Intl
Jan 24
KIX8:20 amOsaka Kansai Intl
29h 52m
3 stops
SEA9:12 pmSeattle/Tacoma Intl
$657
Find similar
United Airlines
Apr 19
SEA6:35 amSeattle/Tacoma Intl
16h 15m
1 stop
KIX2:50 pmOsaka Kansai Intl
May 15
KIX8:30 amOsaka Kansai Intl
21h 55m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$670
Find similar
United Airlines
Dec 1
SEA3:40 pmSeattle/Tacoma Intl
34h 45m
1 stop
KIX7:25 pmOsaka Kansai Intl
Jan 16
KIX8:20 amOsaka Kansai Intl
22h 00m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$672
Find similar

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 October 23, 2025.
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

Fri 1/16

6:03 am-4:40 pm

1 stop17h 37m

Osaka Kansai Intl

Sat 1/24

5:35 pm-1:20 pm

1 stop12h 45m

$617

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 2/7

3:45 pm-10:20 pm

1 stop13h 35m

Osaka Kansai Intl

Sat 2/14

8:20 am-1:20 pm

1 stop22h 00m

$619

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 1/11

6:18 am-4:40 pm

1 stop17h 22m

Osaka Kansai Intl

Sun 1/18

5:35 pm-1:20 pm

1 stop12h 45m

$621

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 1/24

11:00 am-12:50 pm

1 stop32h 50m

Osaka Kansai Intl

Sun 2/1

11:55 am-9:00 am

1 stop14h 05m

$627

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Fri 1/16

11:00 am-10:45 am

1 stop30h 45m

Osaka Kansai Intl

Sat 1/24

11:55 am-9:00 am

1 stop14h 05m

$629

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 12/2

11:00 am-8:45 pm

1 stop16h 45m

Osaka Kansai Intl

Wed 12/10

10:30 am-9:00 am

1 stop15h 30m

$648

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Fri 1/16

6:03 am-4:40 pm

1 stop17h 37m

Osaka Kansai Intl

Sat 1/24

8:20 am-9:12 pm

3 stops29h 52m

$657

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 11/8

12:10 am-8:40 am

1 stop15h 30m

Osaka Kansai Intl

Tue 11/18

9:00 am-1:55 pm

1 stop21h 55m

$658

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 1/17

12:10 am-6:05 pm

1 stop24h 55m

Osaka Kansai Intl

Mon 1/26

9:00 am-1:55 pm

1 stop21h 55m

$667

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/19

6:35 am-2:50 pm

1 stop16h 15m

Osaka Kansai Intl

Fri 5/15

8:30 am-2:25 pm

1 stop21h 55m

$670

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 cheapest month to fly to Osaka Kansai Intl Airport?

In general, September 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 $783. If you aren’t able to travel during the month of September, 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 September, still average around $786.

What is the cheapest day to depart on your flight to Osaka Kansai Intl Airport?

The cheapest day to depart from Seattle to Osaka Kansai Intl Airport is on a Thursday. Travelers who choose to depart for Osaka Kansai Intl Airport on a Thursday will often find tickets for as low as $999. Flights from Seattle to Osaka Kansai Intl Airport on a Sunday will generally be more expensive and average around $1,405. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Osaka Kansai Intl Airport?

Our data shows that the cheapest Seattle to Osaka Kansai Intl Airport flights are usually those with departure times in the morning. Our users have found flights to Osaka Kansai Intl Airport in the morning for as low as $1,065. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,566 on average. Flights to Osaka Kansai Intl Airport from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $961 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 $799 on momondo.

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

As of October 2025, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 42% 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

Direct flights

None
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 13h 35m.

  • 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
Asiana AirlinesPriceFrom $610Free CancellationRating
8.2
486 reviews
Search Asiana Airlines flights
DeltaPriceFrom $649Free CancellationRating
7.9
7,982 reviews
Search Delta flights
ANAPriceFrom $662Free CancellationRating
8.4
990 reviews
Search ANA flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
10,349 reviews
Search Air Canada flights
Korean AirPriceFrom $716Free CancellationRating
8.4
1,153 reviews
Search Korean Air flights
China EasternPriceFrom $719Free CancellationRating
7.2
173 reviews
Search China Eastern flights
United AirlinesPriceFrom $734Free CancellationRating
7.4
8,992 reviews
Search United Airlines flights
STARLUX AirlinesPriceFrom $975Free CancellationRating
8.9
219 reviews
Search STARLUX Airlines flights
EVA AirPriceFrom $1,033Free CancellationRating
8.4
1,258 reviews
Search EVA Air flights
China AirlinesPriceFrom $1,056Free CancellationRating
8.2
774 reviews
Search China 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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