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Cheap flights from Seattle to Osaka from $353

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 8/16. 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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Cheap round-trip flights

Korean Air Logo
12:50 pm - 9:00 pmSEA-KIX
16h 10m1 stop
Korean Air Logo
12:35 pm - 10:40 amKIX-SEA
14h 05m1 stop
$687Korean Air
Find Deal
Mon, Sep 1 - Wed, Sep 10
Asiana Airlines Logo
2:30 pm - 9:05 pmSEA-KIX
14h 35m1 stop
Asiana Airlines Logo
10:50 am - 12:45 pmKIX-SEA
17h 55m1 stop
$691Asiana Airlines
Find Deal
Sun, Jul 13 - Tue, Jul 22
Air Canada Logo
10:05 am - 5:40 pmSEA-KIX
14h 35m1 stop
Air Canada Logo
7:25 pm - 2:26 pmKIX-SEA
12h 01m1 stop
$707Air Canada
Find Deal
Sun, Nov 2 - Mon, Nov 17
Philippine Airlines Logo
11:35 pm - 2:20 pmSEA-KIX
22h 45m1 stop
Philippine Airlines Logo
10:20 am - 7:15 pmKIX-SEA
24h 55m1 stop
$711Philippine Airlines
Find Deal
Wed, Aug 20 - Sun, Sep 21
Philippine Airlines Logo
11:35 pm - 7:40 pmSEA-KIX
28h 05m1 stop
Philippine Airlines Logo
3:20 pm - 7:15 pmKIX-SEA
19h 55m1 stop
$716Philippine Airlines
Find Deal
Sun, Oct 12 - Sun, Oct 19
ANA Logo
4:30 pm - 10:20 pmSEA-KIX
13h 50m1 stop
ANA Logo
5:30 pm - 2:25 pmKIX-SEA
12h 55m1 stop
$725ANA
Find Deal
Tue, Oct 14 - Tue, Oct 21
ANA Logo
4:30 pm - 9:50 pmSEA-KIX
13h 20m1 stop
ANA Logo
5:35 pm - 1:20 pmKIX-SEA
12h 45m1 stop
$733ANA
Find Deal
Wed, Oct 8 - Wed, Nov 12
Air Canada Logo
7:15 pm - 4:25 pmSEA-KIX
29h 10m1 stop
Air Canada Logo
6:05 pm - 2:16 pmKIX-SEA
12h 11m1 stop
$736Air Canada
Find Deal
Sat, Sep 13 - Sat, Sep 20
United Airlines Logo
5:31 pm - 7:30 pmSEA-KIX
33h 59m2 stops
United Airlines Logo
8:25 am - 1:20 pmKIX-SEA
21h 55m1 stop
$744United Airlines
Find Deal
Sun, Sep 28 - Thu, Dec 25
United Airlines Logo
7:37 pm - 7:30 pmSEA-KIX
31h 53m2 stops
United Airlines Logo
8:25 am - 8:54 pmKIX-SEA
29h 29m2 stops
$754United Airlines
Find Deal
Sun, Sep 28 - Thu, Dec 25

Korean Air flights from Seattle to Osaka Kansai Intl Airport

Our best Korean Air deals on Seattle to Osaka Kansai Intl Airport flight tickets
Korean Air
Sep 1
SEA12:50 pmSeattle/Tacoma Intl
16h 10m
1 stop
KIX9:00 pmOsaka Kansai Intl
Sep 10
KIX12:35 pmOsaka Kansai Intl
14h 05m
1 stop
SEA10:40 amSeattle/Tacoma Intl
Korean Air
Jul 13
SEA4:59 pmSeattle/Tacoma Intl
26h 21m
2 stops
KIX11:20 amOsaka Kansai Intl
Jul 22
KIX9:05 amOsaka Kansai Intl
17h 45m
1 stop
SEA10:50 amSeattle/Tacoma Intl
Korean Air
Sep 1
SEA7:10 amSeattle/Tacoma Intl
21h 50m
2 stops
KIX9:00 pmOsaka Kansai Intl
Sep 10
KIX9:05 amOsaka Kansai Intl
21h 33m
2 stops
SEA2:38 pmSeattle/Tacoma Intl

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
Jul 13
SEA2:30 pmSeattle/Tacoma Intl
14h 35m
1 stop
KIX9:05 pmOsaka Kansai Intl
Jul 22
KIX10:50 amOsaka Kansai Intl
17h 55m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
Asiana Airlines
Jul 14
SEA2:30 pmSeattle/Tacoma Intl
14h 35m
1 stop
KIX9:05 pmOsaka Kansai Intl
Jul 25
KIX10:50 amOsaka Kansai Intl
17h 55m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
Asiana Airlines
Jul 10
SEA2:30 pmSeattle/Tacoma Intl
14h 35m
1 stop
KIX9:05 pmOsaka Kansai Intl
Jul 19
KIX7:10 pmOsaka Kansai Intl
33h 35m
1 stop
SEA12:45 pmSeattle/Tacoma Intl

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, 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 $799. If you aren’t able to travel during the month of February, 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 February, still average around $801.

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 $1,040 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 $831 on momondo.

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

As of July 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

Best Price Found

$353

Fastest flight time

13h 20m

Direct flights

None
The best one-way flight to Osaka Kansai Intl Airport from Seattle in the past 72 hours is $353. The best round-trip flight deal from Seattle to Osaka Kansai Intl Airport found on momondo in the last 72 hours is $687.
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. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - 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
Asiana AirlinesPriceFrom $648Free CancellationRating
8.2
452 reviews
Search Asiana Airlines flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
9,681 reviews
Search Air Canada flights
Korean AirPriceFrom $716Free CancellationRating
8.4
1,101 reviews
Search Korean Air flights
China EasternPriceFrom $719Free CancellationRating
7.1
152 reviews
Search China Eastern flights
ANAPriceFrom $746Free CancellationRating
8.4
893 reviews
Search ANA flights
United AirlinesPriceFrom $797Free CancellationRating
7.4
8,861 reviews
Search United Airlines flights
Hawaiian AirlinesPriceFrom $856Free CancellationRating
7.8
2,545 reviews
Search Hawaiian Airlines flights
STARLUX AirlinesPriceFrom $918Free CancellationRating
9.1
189 reviews
Search STARLUX Airlines flights
EVA AirPriceFrom $963Free CancellationRating
8.4
1,215 reviews
Search EVA Air flights
China AirlinesPriceFrom $999Free CancellationRating
8.3
744 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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1 adult
Tue 7/8
Tue 7/15

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