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Cheap flights from Osaka to Seattle from $500

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Osaka to Seattle departing on 9/7. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Osaka to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
12:10 pm - 1:40 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
17h 30m1 stop Incheon Intl
Multiple Airlines Logo
1:35 pm - 9:15 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
15h 40m1 stop Incheon Intl
$940Multiple Airlines
Thu, Sep 17 - Sun, Sep 27
Multiple Airlines Logo
12:50 pm - 1:40 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
16h 50m1 stop Incheon Intl
Multiple Airlines Logo
1:35 pm - 9:15 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
15h 40m1 stop Incheon Intl
$944Multiple Airlines
Thu, Sep 17 - Sun, Sep 27
Multiple Airlines Logo
11:45 am - 1:40 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
17h 55m1 stop Incheon Intl
Multiple Airlines Logo
1:35 pm - 10:45 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
17h 10m1 stop Incheon Intl
$1,005Multiple Airlines
Wed, Sep 30 - Wed, Oct 7
Multiple Airlines Logo
7:35 am - 6:36 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
27h 01m2 stops Tokyo Narita Los Angeles
Multiple Airlines Logo
4:30 pm - 9:50 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
13h 20m1 stop Tokyo Haneda
$1,061Multiple Airlines
Tue, Oct 6 - Tue, Oct 13
Multiple Airlines Logo
7:35 am - 6:36 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
27h 01m2 stops Tokyo Narita Los Angeles
Multiple Airlines Logo
4:30 pm - 10:20 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
13h 50m1 stop Tokyo Haneda
$1,061Multiple Airlines
Tue, Oct 6 - Mon, Oct 12
Multiple Airlines Logo
7:35 am - 6:36 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
27h 01m2 stops Tokyo Narita Los Angeles
Multiple Airlines Logo
4:30 pm - 9:50 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
13h 20m1 stop Tokyo Haneda
$1,061Multiple Airlines
Tue, Oct 6 - Sat, Oct 17
Multiple Airlines Logo
7:35 am - 6:36 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
27h 01m2 stops Tokyo Narita Los Angeles
Multiple Airlines Logo
4:30 pm - 9:50 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
13h 20m1 stop Tokyo Haneda
$1,061Multiple Airlines
Tue, Oct 6 - Wed, Oct 14
Multiple Airlines Logo
7:35 am - 6:36 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
27h 01m2 stops Tokyo Narita Los Angeles
Multiple Airlines Logo
4:30 pm - 10:20 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
13h 50m1 stop Tokyo Haneda
$1,061Multiple Airlines
Tue, Oct 6 - Thu, Oct 15
Air Canada Logo
6:00 pm - 6:32 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
16h 32m1 stop Vancouver Intl
Air Canada Logo
5:40 am - 4:25 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
18h 45m1 stop Vancouver Intl
$1,212Air Canada
Mon, Sep 28 - Mon, Oct 5
Air Canada Logo
6:00 pm - 6:32 pmKIX  Osaka Kansai Intl-SEA Seattle/Tacoma Intl
16h 32m1 stop Vancouver Intl
Air Canada Logo
5:40 am - 4:25 pmSEA  Seattle/Tacoma Intl-KIX Osaka Kansai Intl
18h 45m1 stop Vancouver Intl
$1,212Air Canada
Tue, Sep 29 - Sun, Oct 11

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ANA flights from Osaka to Seattle

Our best ANA deals on Osaka to Seattle flight tickets
ANA
Sep 17
ITM5:40 pmOsaka Itami
12h 45m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
Sep 27
SEA4:30 pmSeattle/Tacoma Intl
23h 35m
1 stop
ITM8:05 amOsaka Itami
$1,367
ANA
Sep 17
ITM5:40 pmOsaka Itami
12h 45m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
Sep 27
SEA4:30 pmSeattle/Tacoma Intl
23h 35m
1 stop
ITM8:05 amOsaka Itami
$1,372
ANA
Oct 14
ITM5:45 pmOsaka Itami
12h 40m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
Oct 21
SEA4:30 pmSeattle/Tacoma Intl
22h 55m
1 stop
ITM7:25 amOsaka Itami
$1,379

Japan Airlines flights from Osaka to Seattle

Our best Japan Airlines deals on Osaka to Seattle flight tickets
Japan Airlines
Sep 29
ITM1:25 pmOsaka Itami
13h 10m
1 stop
SEA10:35 amSeattle/Tacoma Intl
Oct 7
SEA6:39 amSeattle/Tacoma Intl
21h 11m
2 stops
ITM7:50 pmOsaka Itami
$1,447
Japan Airlines
Oct 13
ITM12:30 pmOsaka Itami
14h 05m
1 stop
SEA10:35 amSeattle/Tacoma Intl
Oct 20
SEA1:15 pmSeattle/Tacoma Intl
14h 35m
1 stop
ITM7:50 pmOsaka Itami
$1,498
Japan Airlines
Oct 14
ITM1:30 pmOsaka Itami
18h 34m
2 stops
SEA4:04 pmSeattle/Tacoma Intl
Oct 21
SEA6:39 amSeattle/Tacoma Intl
21h 11m
2 stops
ITM7:50 pmOsaka Itami
$1,519

momondo Fare Finder

 
Customize your flight search to find flights from Osaka to Seattle 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 August 9, 2026.
Use the filters below to find and compare flights from Osaka to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Thu 9/17

12:10 pm-1:40 pm

1 stop17h 30m

Seattle/Tacoma Intl

Sun 9/27

1:35 pm-9:15 pm

1 stop15h 40m

$940
Quickest round-trip

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Thu 9/17

12:50 pm-1:40 pm

1 stop16h 50m

Seattle/Tacoma Intl

Sun 9/27

1:35 pm-9:15 pm

1 stop15h 40m

$944

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Wed 9/30

11:45 am-1:40 pm

1 stop17h 55m

Seattle/Tacoma Intl

Wed 10/7

1:35 pm-10:45 pm

1 stop17h 10m

$1,005

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Tue 10/6

7:35 am-6:36 pm

2 stops27h 01m

Seattle/Tacoma Intl

Tue 10/13

4:30 pm-9:50 pm

1 stop13h 20m

$1,061

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Tue 10/6

7:35 am-6:36 pm

2 stops27h 01m

Seattle/Tacoma Intl

Mon 10/12

4:30 pm-10:20 pm

1 stop13h 50m

$1,061

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Tue 10/6

7:35 am-6:36 pm

2 stops27h 01m

Seattle/Tacoma Intl

Sat 10/17

4:30 pm-9:50 pm

1 stop13h 20m

$1,061

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Tue 10/6

7:35 am-6:36 pm

2 stops27h 01m

Seattle/Tacoma Intl

Wed 10/14

4:30 pm-9:50 pm

1 stop13h 20m

$1,061

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Tue 10/6

7:35 am-6:36 pm

2 stops27h 01m

Seattle/Tacoma Intl

Thu 10/15

4:30 pm-10:20 pm

1 stop13h 50m

$1,061

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Mon 9/28

6:00 pm-6:32 pm

1 stop16h 32m

Seattle/Tacoma Intl

Mon 10/5

5:40 am-4:25 pm

1 stop18h 45m

$1,212

OsakaSeattle

KIX Osaka Kansai Intl - SEA Seattle/Tacoma Intl

KIXSEA

Osaka Kansai Intl

Tue 9/29

6:00 pm-6:32 pm

1 stop16h 32m

Seattle/Tacoma Intl

Sun 10/11

5:40 am-4:25 pm

1 stop18h 45m

$1,212

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 Seattle from

How to get the cheapest flight ticket from Osaka to Seattle

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 Seattle?

In general, May is the cheapest month to fly from Osaka to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you don’t want to visit Seattle in May, then you should wait until January to fly from Osaka, when ticket prices are also cheap, with an average price of $0.

How have Osaka to Seattle flight prices changed over time?

As of August 2026, prices for Osaka to Seattle flights are approximately 65% more expensive when compared to flights at the same time last year.

When to book flights from Osaka to Seattle

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

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

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

Fastest flight time

17h 30m

Direct flights

None
The fastest flight from Osaka to Seattle takes 17h 30m
There are no direct flights from Osaka to Seattle. There are no popular flight routes from Osaka to Seattle.
Search flight deals

Frequently asked questions about flying from Osaka to Seattle

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

    The straight-line distance from Osaka to Seattle/Tacoma Intl is 4994.7 mi. By plane, this route typically takes 17h 30m.

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

    Prices for flights from Osaka to Seattle/Tacoma Intl Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Osaka to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Osaka to Seattle?

Best airlines flying from Osaka to Seattle

Compare and see reviews for airlines that fly from Osaka to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $794Free CancellationRating
7.1
11,455 reviews
Search Air Canada flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Kent
Lynnwood
Redmond
Lakewood
Federal Way
Puyallup
Tukwila
Fife
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

Why use momondo?

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

Finding the right flight to Seattle from Osaka is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Osaka to Seattle with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seattle from Osaka which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Osaka to Seattle?

Once you have performed a search for Osaka to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Osaka to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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