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Cheap flights from Seattle to Osaka from $400

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 7/21. 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

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.
ANA Logo
4:30 pm - 9:45 pm
SEA
-
UKB
13h 15m
1 stop
ANA Logo
9:15 pm - 2:25 pm
UKB
-
SEA
33h 10m
1 stop
$814ANA
Sun, Aug 16 - Mon, Sep 21
ANA Logo
4:30 pm - 7:50 am
SEA
-
UKB
23h 20m
1 stop
ANA Logo
7:05 am - 2:25 pm
UKB
-
SEA
23h 20m
1 stop
$828ANA
Sun, Sep 6 - Wed, Sep 16
ANA Logo
4:30 pm - 9:45 pm
SEA
-
UKB
13h 15m
1 stop
ANA Logo
7:05 am - 2:25 pm
UKB
-
SEA
23h 20m
1 stop
$833ANA
Sun, Jul 19 - Wed, Aug 5
Japan Airlines Logo
8:40 am - 8:50 pm
SEA
-
KIX
20h 10m
2 stops
Japan Airlines Logo
6:40 am - 3:59 pm
KIX
-
SEA
25h 19m
2 stops
$847Japan Airlines
Wed, Sep 9 - Wed, Sep 23
United Airlines Logo
8:40 am - 7:50 pm
SEA
-
KIX
19h 10m
2 stops
United Airlines Logo
8:20 am - 1:20 pm
KIX
-
SEA
22h 00m
1 stop
$854United Airlines
Wed, Sep 30 - Tue, Dec 8
Korean Air Logo
12:50 pm - 10:55 am
SEA
-
UKB
30h 05m
1 stop
Korean Air Logo
6:40 pm - 10:00 am
UKB
-
SEA
31h 20m
1 stop
$856Korean Air
Sun, Oct 18 - Mon, Oct 26
Asiana Airlines Logo
12:10 am - 9:00 am
SEA
-
KIX
16h 50m
1 stop
Asiana Airlines Logo
10:30 am - 3:15 pm
KIX
-
SEA
20h 45m
1 stop
$858Asiana Airlines
Mon, Oct 12 - Fri, Oct 16
United Airlines Logo
4:30 pm - 7:50 pm
SEA
-
KIX
35h 20m
1 stop
United Airlines Logo
8:20 am - 9:56 pm
KIX
-
SEA
29h 36m
2 stops
$859United Airlines
Sun, Oct 18 - Wed, Oct 28
Asiana Airlines Logo
12:10 am - 8:55 pm
SEA
-
KIX
28h 45m
1 stop
Asiana Airlines Logo
9:10 am - 2:55 pm
KIX
-
SEA
21h 45m
1 stop
$861Asiana Airlines
Sun, Oct 25 - Fri, Oct 30
Korean Air Logo
4:15 pm - 5:45 pm
SEA
-
UKB
33h 30m
2 stops
Korean Air Logo
6:40 pm - 10:00 am
UKB
-
SEA
31h 20m
1 stop
$861Korean Air
Sun, Oct 18 - Wed, Oct 28

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Asiana Airlines flights from Seattle to Osaka

Our best Asiana Airlines deals on Seattle to Osaka flight tickets
Asiana Airlines
Sep 27
SEA12:10 amSeattle/Tacoma Intl
29h 25m
1 stop
KIX9:35 pmOsaka Kansai Intl
Oct 12
KIX7:45 pmOsaka Kansai Intl
35h 30m
1 stop
SEA3:15 pmSeattle/Tacoma Intl
$858
Asiana Airlines
Oct 25
SEA12:10 amSeattle/Tacoma Intl
28h 45m
1 stop
KIX8:55 pmOsaka Kansai Intl
Oct 30
KIX10:50 amOsaka Kansai Intl
20h 05m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$861
Asiana Airlines
Oct 1
SEA12:10 amSeattle/Tacoma Intl
29h 25m
1 stop
KIX9:35 pmOsaka Kansai Intl
Oct 6
KIX10:30 amOsaka Kansai Intl
20h 45m
1 stop
SEA3:15 pmSeattle/Tacoma Intl
$865

ANA flights from Seattle to Osaka

Our best ANA deals on Seattle to Osaka flight tickets
ANA
Aug 16
SEA4:30 pmSeattle/Tacoma Intl
13h 15m
1 stop
UKB9:45 pmKobe
Sep 21
UKB9:15 pmKobe
33h 10m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$814
ANA
Sep 6
SEA4:30 pmSeattle/Tacoma Intl
23h 20m
1 stop
UKB7:50 amKobe
Sep 16
UKB7:05 amKobe
23h 20m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$828
ANA
Jul 19
SEA4:30 pmSeattle/Tacoma Intl
13h 15m
1 stop
UKB9:45 pmKobe
Aug 5
UKB7:05 amKobe
23h 20m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$833

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 May 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

Cheapest round-trip

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 8/16

4:30 pm-9:45 pm

1 stop13h 15m

Kobe

Mon 9/21

9:15 pm-2:25 pm

1 stop33h 10m

$814

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 9/6

4:30 pm-7:50 am

1 stop23h 20m

Kobe

Wed 9/16

7:05 am-2:25 pm

1 stop23h 20m

$828
Quickest round-trip

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 7/19

4:30 pm-9:45 pm

1 stop13h 15m

Kobe

Wed 8/5

7:05 am-2:25 pm

1 stop23h 20m

$833

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/9

8:40 am-8:50 pm

2 stops20h 10m

Osaka Kansai Intl

Wed 9/23

6:40 am-3:59 pm

2 stops25h 19m

$847

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/30

8:40 am-7:50 pm

2 stops19h 10m

Osaka Kansai Intl

Tue 12/8

8:20 am-1:20 pm

1 stop22h 00m

$854

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 10/18

12:50 pm-10:55 am

1 stop30h 05m

Kobe

Mon 10/26

6:40 pm-10:00 am

1 stop31h 20m

$856

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 10/12

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Fri 10/16

10:30 am-3:15 pm

1 stop20h 45m

$858

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 10/18

4:30 pm-7:50 pm

1 stop35h 20m

Osaka Kansai Intl

Wed 10/28

8:20 am-9:56 pm

2 stops29h 36m

$859

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 10/25

12:10 am-8:55 pm

1 stop28h 45m

Osaka Kansai Intl

Fri 10/30

9:10 am-2:55 pm

1 stop21h 45m

$861

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 10/18

4:15 pm-5:45 pm

2 stops33h 30m

Kobe

Wed 10/28

6:40 pm-10:00 am

1 stop31h 20m

$861

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

What is the cheapest month to fly to Osaka?

In general, March 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 $363. If you are unable to visit Osaka during the month of March, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $370.

How far in advance should I book a flight from Seattle 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 $845 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 $667 on momondo.

Can stopping save me money on Seattle to Osaka flights?

You could potentially save up to 46% on your flight if you consider stops on a Seattle to Osaka flight.

How have Seattle to Osaka flight prices changed over time?

As of May 2026, prices for Seattle to Osaka flights are approximately 31% cheaper when compared to flights at the same time last year.

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

Frequently asked questions about flying from Seattle to Osaka

  • 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
7.9
12,320 reviews
Search Alaska Airlines flights
Asiana AirlinesPriceFrom $565Free CancellationRating
8.1
527 reviews
Search Asiana Airlines flights
ANAPriceFrom $650Free CancellationRating
8.3
1,202 reviews
Search ANA flights
Air CanadaPriceFrom $669Free CancellationRating
7.1
10,993 reviews
Search Air Canada flights
Japan AirlinesPriceFrom $697Free CancellationRating
8.3
1,803 reviews
Search Japan 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