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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 1/18. 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
$607Multiple Airlines
Tue, Jan 20 - Tue, Jan 27
Multiple Airlines Logo
10:05 am - 8:35 pm
SEA
-
KIX
17h 30m2 stops
Multiple Airlines Logo
10:50 am - 7:16 pm
KIX
-
SEA
25h 26m2 stops
$609Multiple Airlines
Sun, Jan 18 - Tue, Jan 27
Japan Airlines Logo
12:30 pm - 7:55 pm
SEA
-
ITM
14h 25m1 stop
Japan Airlines Logo
8:10 pm - 9:55 am
ITM
-
SEA
30h 45m1 stop
$611Japan Airlines
Sat, Jan 24 - Sun, Feb 1
Japan Airlines Logo
6:00 am - 8:05 pm
SEA
-
ITM
21h 05m2 stops
Japan Airlines Logo
8:10 pm - 9:55 am
ITM
-
SEA
30h 45m1 stop
$614Japan Airlines
Sat, Jan 24 - Sun, Feb 1
Japan Airlines Logo
6:00 am - 6:50 pm
SEA
-
KIX
19h 50m1 stop
Japan Airlines Logo
8:00 am - 9:55 am
KIX
-
SEA
18h 55m1 stop
$616Japan Airlines
Thu, Jan 15 - Thu, Jan 22
Japan Airlines Logo
12:30 pm - 7:55 pm
SEA
-
ITM
14h 25m1 stop
Japan Airlines Logo
2:40 pm - 9:55 am
ITM
-
SEA
12h 15m1 stop
$618Japan Airlines
Thu, Jan 15 - Thu, Jan 22
Asiana Airlines Logo
12:10 am - 8:55 pm
SEA
-
KIX
28h 45m1 stop
Asiana Airlines Logo
9:10 am - 2:55 pm
KIX
-
SEA
21h 45m1 stop
$628Asiana Airlines
Sun, Apr 12 - Mon, Apr 27
Asiana Airlines Logo
12:10 am - 8:55 pm
SEA
-
KIX
27h 45m1 stop
Asiana Airlines Logo
9:00 am - 1:55 pm
KIX
-
SEA
21h 55m1 stop
$630Asiana Airlines
Sat, Jan 17 - Mon, Jan 26
ANA Logo
3:45 pm - 8:00 am
SEA
-
UKB
23h 15m1 stop
ANA Logo
9:15 pm - 1:20 pm
UKB
-
SEA
33h 05m1 stop
$638ANA
Sat, Jan 24 - Sun, Feb 1
ANA Logo
3:45 pm - 8:00 am
SEA
-
UKB
23h 15m1 stop
ANA Logo
7:05 am - 1:20 pm
UKB
-
SEA
23h 15m1 stop
$639ANA
Sat, Jan 31 - Sat, Feb 7

United Airlines flights from Seattle to Osaka

Our best United Airlines deals on Seattle to Osaka flight tickets
United Airlines
Feb 6
SEA6:03 amSeattle/Tacoma Intl
17h 37m
1 stop
KIX4:40 pmOsaka Kansai Intl
Feb 24
KIX6:35 pmOsaka Kansai Intl
16h 51m
1 stop
SEA6:26 pmSeattle/Tacoma Intl
$652
Find similar
United Airlines
Jan 23
SEA6:03 amSeattle/Tacoma Intl
17h 37m
1 stop
KIX4:40 pmOsaka Kansai Intl
Feb 2
KIX6:35 pmOsaka Kansai Intl
19h 37m
1 stop
SEA9:12 pmSeattle/Tacoma Intl
$655
Find similar
United Airlines
Feb 19
SEA8:30 amSeattle/Tacoma Intl
39h 10m
2 stops
KIX4:40 pmOsaka Kansai Intl
Mar 7
KIX6:35 pmOsaka Kansai Intl
19h 23m
1 stop
SEA8:58 pmSeattle/Tacoma Intl
$658
Find similar

Korean Air flights from Seattle to Osaka

Our best Korean Air deals on Seattle to Osaka flight tickets
Korean Air
Apr 15
SEA12:50 pmSeattle/Tacoma Intl
16h 10m
1 stop
KIX9:00 pmOsaka Kansai Intl
Apr 24
KIX9:05 amOsaka Kansai Intl
17h 35m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$666
Find similar
Korean Air
Apr 15
SEA5:59 pmSeattle/Tacoma Intl
25h 21m
2 stops
KIX11:20 amOsaka Kansai Intl
Apr 21
KIX6:20 pmOsaka Kansai Intl
32h 20m
1 stop
SEA10:40 amSeattle/Tacoma Intl
$671
Find similar
Korean Air
Jan 17
SEA11:00 amSeattle/Tacoma Intl
30h 10m
1 stop
UKB10:10 amKobe
Jan 21
UKB11:10 amKobe
14h 50m
1 stop
SEA9:00 amSeattle/Tacoma Intl
$747
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Osaka 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 January 2, 2026.
Use the filters below to find and compare flights from Seattle to Osaka that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 1/20

5:50 am-8:35 pm

2 stops21h 45m

Osaka Kansai Intl

Tue 1/27

10:50 am-7:16 pm

2 stops25h 26m

$607

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 1/18

10:05 am-8:35 pm

2 stops17h 30m

Osaka Kansai Intl

Tue 1/27

10:50 am-7:16 pm

2 stops25h 26m

$609

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Sat 1/24

12:30 pm-7:55 pm

1 stop14h 25m

Osaka Itami

Sun 2/1

8:10 pm-9:55 am

1 stop30h 45m

$611

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Sat 1/24

6:00 am-8:05 pm

2 stops21h 05m

Osaka Itami

Sun 2/1

8:10 pm-9:55 am

1 stop30h 45m

$614

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Thu 1/15

6:00 am-6:50 pm

1 stop19h 50m

Osaka Kansai Intl

Thu 1/22

8:00 am-9:55 am

1 stop18h 55m

$616

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Thu 1/15

12:30 pm-7:55 pm

1 stop14h 25m

Osaka Itami

Thu 1/22

2:40 pm-9:55 am

1 stop12h 15m

$618

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 4/12

12:10 am-8:55 pm

1 stop28h 45m

Osaka Kansai Intl

Mon 4/27

9:10 am-2:55 pm

1 stop21h 45m

$628

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 1/17

12:10 am-8:55 pm

1 stop27h 45m

Osaka Kansai Intl

Mon 1/26

9:00 am-1:55 pm

1 stop21h 55m

$630

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sat 1/24

3:45 pm-8:00 am

1 stop23h 15m

Kobe

Sun 2/1

9:15 pm-1:20 pm

1 stop33h 05m

$638

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sat 1/31

3:45 pm-8:00 am

1 stop23h 15m

Kobe

Sat 2/7

7:05 am-1:20 pm

1 stop23h 15m

$639

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

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?

In general, January is the cheapest month to fly from Seattle to Osaka. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $678. If you are unable to visit Osaka during the month of January, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $700.

How far in advance should I book a flight to Osaka?

You are more likely to see cheaper flights to Osaka from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Osaka for around $910 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Osaka from Seattle for as low as $762 on momondo.

Can stopping save me money on Seattle to Osaka flights?

You could potentially save up to 54% on your flight if you consider stops on a Seattle to Osaka flight.

When to book flights from Seattle to Osaka

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Osaka according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Osaka (SEA to OSA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Osaka

Fastest flight time

13h 15m

Direct flights

None
The fastest flight from Seattle to Osaka takes 13h 15m
There are no direct flights from Seattle to Osaka. There are no popular flight routes from Seattle to Osaka.
Search flight deals

  • How far is Seattle/Tacoma Intl to Osaka by plane?

    The distance between Seattle/Tacoma Intl and Osaka is about 4994.7 mi. Flights usually cover this in 13h 15m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Osaka?

    Prices for flights from Seattle/Tacoma Intl Airport to Osaka are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Osaka?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Osaka?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Osaka.

  • What documentation or ID do you need to fly to Osaka?

    The travel and health documents you'll need for your trip to Osaka 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. 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?

Best airlines flying from Seattle to Osaka

Compare and see reviews for airlines that fly from Seattle to Osaka with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $370Free CancellationRating
8.0
11,607 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $595Free CancellationRating
8.2
502 reviews
Search Asiana Airlines flights
United AirlinesPriceFrom $647Free CancellationRating
7.4
9,129 reviews
Search United Airlines flights
ANAPriceFrom $650Free CancellationRating
8.4
1,055 reviews
Search ANA flights
Korean AirPriceFrom $660Free CancellationRating
8.4
1,185 reviews
Search Korean Air flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
10,574 reviews
Search Air Canada flights
Japan AirlinesPriceFrom $697Free CancellationRating
8.3
1,663 reviews
Search Japan Airlines flights
STARLUX AirlinesPriceFrom $934Free CancellationRating
8.9
253 reviews
Search STARLUX Airlines flights
China AirlinesPriceFrom $1,056Free CancellationRating
8.3
798 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
Nishinomiya

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Osaka?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Seattle to Osaka. momondo saves you time and could save you money on your trip.

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 helps you find the best flight between Seattle and Osaka by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Seattle to Osaka right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Osaka now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Osaka and let you know when they change.

An easier way to manage your Osaka trip

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Find better results for your trip to Japan

Fly into one of these airports located in Osaka

Airports listed have a maximum distance of 22.5 mi from Osaka
Osaka Itami Airport
Osaka Kansai Intl Airport