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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 1/27. 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.
Multiple Airlines Logo
5:50 am - 8:35 pm
SEA
-
KIX
21h 45m2 stops
Multiple Airlines Logo
10:50 am - 7:16 pm
KIX
-
SEA
25h 26m2 stops
$608Multiple Airlines
mar., ene. 20 - mar., ene. 27
Multiple Airlines Logo
8:00 pm - 8:45 am
SEA
-
KIX
43h 45m2 stops
Multiple Airlines Logo
8:00 am - 10:06 pm
KIX
-
SEA
31h 06m2 stops
$614Multiple Airlines
sáb., ene. 31 - sáb., feb. 7
Japan Airlines Logo
12:30 pm - 10:20 pm
SEA
-
KIX
16h 50m1 stop
Japan Airlines Logo
8:00 am - 9:55 am
KIX
-
SEA
18h 55m1 stop
$615Japan Airlines
mié., ene. 14 - mié., ene. 21
Japan Airlines Logo
6:00 am - 6:50 pm
SEA
-
KIX
19h 50m1 stop
Japan Airlines Logo
10:50 am - 9:55 am
KIX
-
SEA
16h 05m1 stop
$619Japan Airlines
mar., ene. 13 - mar., ene. 20
Multiple Airlines Logo
8:00 pm - 8:45 am
SEA
-
KIX
43h 45m2 stops
Multiple Airlines Logo
8:00 am - 2:31 pm
KIX
-
SEA
23h 31m2 stops
$621Multiple Airlines
sáb., ene. 31 - sáb., feb. 7
Japan Airlines Logo
6:00 am - 6:50 pm
SEA
-
KIX
19h 50m1 stop
Japan Airlines Logo
10:50 am - 9:55 am
KIX
-
SEA
16h 05m1 stop
$623Japan Airlines
jue., ene. 15 - jue., ene. 22
Japan Airlines Logo
8:25 am - 10:20 pm
SEA
-
KIX
20h 55m2 stops
Japan Airlines Logo
7:00 am - 9:55 am
KIX
-
SEA
19h 55m1 stop
$625Japan Airlines
mar., feb. 3 - mar., feb. 17
Multiple Airlines Logo
8:06 am - 6:50 pm
SEA
-
KIX
17h 44m1 stop
Multiple Airlines Logo
5:50 pm - 5:52 pm
KIX
-
SEA
17h 02m1 stop
$627Multiple Airlines
sáb., ene. 31 - sáb., feb. 7
Air Canada Logo
8:00 pm - 5:40 pm
SEA
-
KIX
28h 40m1 stop
Air Canada Logo
7:25 pm - 7:16 pm
KIX
-
SEA
15h 51m1 stop
$628Air Canada
sáb., feb. 28 - mar., mar. 10
Japan Airlines Logo
6:00 am - 6:50 pm
SEA
-
KIX
19h 50m1 stop
Japan Airlines Logo
10:50 am - 9:55 am
KIX
-
SEA
16h 05m1 stop
$629Japan Airlines
mar., ene. 13 - mar., ene. 20

ANA flights from Seattle to Osaka Kansai Intl Airport

Our best ANA deals on Seattle to Osaka Kansai Intl Airport flight tickets
ANA
Jan 31
SEA3:45 pmSeattle/Tacoma Intl
25h 30m
1 stop
KIX10:15 amOsaka Kansai Intl
Feb 7
KIX2:05 pmOsaka Kansai Intl
16h 15m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$638
Find similar
ANA
Feb 17
SEA7:15 amSeattle/Tacoma Intl
16h 25m
1 stop
KIX4:40 pmOsaka Kansai Intl
Mar 2
KIX3:45 pmOsaka Kansai Intl
14h 35m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$640
Find similar
ANA
Feb 7
SEA3:45 pmSeattle/Tacoma Intl
13h 35m
1 stop
KIX10:20 pmOsaka Kansai Intl
Feb 14
KIX7:00 pmOsaka Kansai Intl
19h 01m
2 stops
SEA9:01 pmSeattle/Tacoma Intl
$646
Find similar

Asiana Airlines flights from Seattle to Osaka Kansai Intl Airport

Our best Asiana Airlines deals on Seattle to Osaka Kansai Intl Airport flight tickets
Asiana Airlines
Apr 12
SEA12:10 amSeattle/Tacoma Intl
28h 45m
1 stop
KIX8:55 pmOsaka Kansai Intl
Apr 24
KIX10:50 amOsaka Kansai Intl
20h 05m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$644
Find similar
Asiana Airlines
Apr 12
SEA12:10 amSeattle/Tacoma Intl
17h 30m
1 stop
KIX9:40 amOsaka Kansai Intl
Apr 20
KIX9:10 amOsaka Kansai Intl
21h 45m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$648
Find similar
Asiana Airlines
Dec 22
SEA12:10 amSeattle/Tacoma Intl
27h 45m
1 stop
KIX8:55 pmOsaka Kansai Intl
Dec 25
KIX11:30 amOsaka Kansai Intl
19h 25m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$1,639
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 diciembre 18, 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

mar. 1/20

5:50 am-8:35 pm

2 stops21h 45m

Osaka Kansai Intl

mar. 1/27

10:50 am-7:16 pm

2 stops25h 26m

$608

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

sáb. 1/31

8:00 pm-8:45 am

2 stops43h 45m

Osaka Kansai Intl

sáb. 2/7

8:00 am-10:06 pm

2 stops31h 06m

$614

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

mié. 1/14

12:30 pm-10:20 pm

1 stop16h 50m

Osaka Kansai Intl

mié. 1/21

8:00 am-9:55 am

1 stop18h 55m

$615

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

mar. 1/13

6:00 am-6:50 pm

1 stop19h 50m

Osaka Kansai Intl

mar. 1/20

10:50 am-9:55 am

1 stop16h 05m

$619

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

sáb. 1/31

8:00 pm-8:45 am

2 stops43h 45m

Osaka Kansai Intl

sáb. 2/7

8:00 am-2:31 pm

2 stops23h 31m

$621

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

jue. 1/15

6:00 am-6:50 pm

1 stop19h 50m

Osaka Kansai Intl

jue. 1/22

10:50 am-9:55 am

1 stop16h 05m

$623

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

mar. 2/3

8:25 am-10:20 pm

2 stops20h 55m

Osaka Kansai Intl

mar. 2/17

7:00 am-9:55 am

1 stop19h 55m

$625

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

sáb. 1/31

8:06 am-6:50 pm

1 stop17h 44m

Osaka Kansai Intl

sáb. 2/7

5:50 pm-5:52 pm

1 stop17h 02m

$627

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

sáb. 2/28

8:00 pm-5:40 pm

1 stop28h 40m

Osaka Kansai Intl

mar. 3/10

7:25 pm-7:16 pm

1 stop15h 51m

$628

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

mar. 1/13

6:00 am-6:50 pm

1 stop19h 50m

Osaka Kansai Intl

mar. 1/20

10:50 am-9:55 am

1 stop16h 05m

$629

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, 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 $757. If you aren’t able to travel during the month of November, then book flights to Osaka Kansai Intl Airport from Seattle during September instead. Flights to Osaka Kansai Intl Airport in September, while not as cheap as those in November, still average around $783.

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 $908 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 $762 on momondo.

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

As of December 2025, prices for Seattle to Osaka Kansai Intl Airport flights are approximately 45% 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

15h 40m

Direct flights

None
The fastest flight from Seattle to Osaka Kansai Intl Airport takes 15h 40m
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 15h 40m.

  • 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
8.0
11,474 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $595Free CancellationRating
8.2
493 reviews
Search Asiana Airlines flights
United AirlinesPriceFrom $647Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights
ANAPriceFrom $657Free CancellationRating
8.4
1,027 reviews
Search ANA flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
10,532 reviews
Search Air Canada flights
Korean AirPriceFrom $716Free CancellationRating
8.4
1,186 reviews
Search Korean Air flights
China AirlinesPriceFrom $1,056Free CancellationRating
8.3
792 reviews
Search China Airlines flights
STARLUX AirlinesPriceFrom $1,095Free CancellationRating
8.9
245 reviews
Search STARLUX Airlines 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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