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$405+ Cheap flights from Osaka (OSA) to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Osaka to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Osaka (OSA) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$672
(Kiwi.com)

One-way from

$405
(Kiwi.com)

Popular in

September

Cheapest in

May

Average price

$1,106
From Osaka (OSA) to Seattle/Tacoma Intl
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One-way flight from Osaka (OSA) to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 8% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Osaka to Seattle

Cheapest flights from Osaka to Seattle
Explore the most affordable flight options available from Osaka to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:00 pmKIX - SEA
1 stop18h 55mMultiple Airlines
Fri 11/281:40 pmSEA - KIX
1 stop16h 05mMultiple Airlines
Deal found 9/10$672
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:50 amKIX - SEA
1 stop20h 05mMultiple Airlines
Fri 11/281:40 pmSEA - KIX
1 stop16h 05mMultiple Airlines
Deal found 9/10$683
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:50 amKIX - SEA
1 stop20h 05mMultiple Airlines
Sat 11/2912:10 amSEA - KIX
1 stop19h 10mMultiple Airlines
Deal found 9/10$694
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:00 pmKIX - SEA
1 stop18h 55mMultiple Airlines
Sat 11/291:40 pmSEA - KIX
1 stop16h 05mMultiple Airlines
Deal found 9/10$710
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/145:00 pmKIX - SEA
2 stops29h 35mMultiple Airlines
Sun 11/301:40 pmSEA - KIX
1 stop16h 05mMultiple Airlines
Deal found 9/10$716
This Cheapflightsfares deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/810:20 amKIX - SEA
1 stop24h 55mPhilippine Airlines
Wed 10/2910:30 pmSEA - KIX
1 stop29h 05mPhilippine Airlines
Deal found 9/10$719
This FlightHub deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/148:25 pmKIX - SEA
1 stop34h 30mAsiana Airlines
Thu 11/2712:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Deal found 9/10$726
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1611:50 amKIX - SEA
1 stop19h 05mMultiple Airlines
Sun 11/301:40 pmSEA - KIX
1 stop16h 05mMultiple Airlines
Deal found 9/10$729
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1611:50 amKIX - SEA
1 stop19h 05mMultiple Airlines
Fri 11/281:40 pmSEA - KIX
1 stop16h 05mMultiple Airlines
Deal found 9/10$730
This Trip.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2610:15 amKIX - SEA
1 stop25h 20mPhilippine Airlines
Sun 11/29:30 pmSEA - KIX
1 stop23h 35mPhilippine Airlines
Deal found 9/11$735
This ANA deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure ANA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/154:50 pmITM - SEA
1 stop13h 30mANA
Sat 11/293:40 pmSEA - ITM
1 stop23h 30mANA
Deal found 9/10$1,077
This Orbitz deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/154:30 pmITM - SEA
2 stops23h 51mMultiple Airlines
Sat 11/293:40 pmSEA - ITM
1 stop22h 50mMultiple Airlines
Deal found 9/10$1,084

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Osaka to Seattle that are best for you.

Fly from

Osaka

Fly to

Seattle

Route

Depart

Return

Price

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 11/14

12:00 pm-1:55 pm

1 stop18h 55m

Seattle/Tacoma Intl

Fri 11/28

1:40 pm-10:45 pm

1 stop16h 05m

$672

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sat 11/15

10:50 am-1:55 pm

1 stop20h 05m

Seattle/Tacoma Intl

Fri 11/28

1:40 pm-10:45 pm

1 stop16h 05m

$683

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sat 11/15

10:50 am-1:55 pm

1 stop20h 05m

Seattle/Tacoma Intl

Sun 11/30

1:40 pm-10:45 pm

1 stop16h 05m

$683

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 11/14

12:00 pm-1:55 pm

1 stop18h 55m

Seattle/Tacoma Intl

Sat 11/29

1:40 pm-10:45 pm

1 stop16h 05m

$710

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 10/8

10:20 am-7:15 pm

1 stop24h 55m

Seattle/Tacoma Intl

Wed 10/29

10:30 pm-7:35 pm

1 stop29h 05m

$719

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 11/14

8:25 pm-1:55 pm

1 stop34h 30m

Seattle/Tacoma Intl

Thu 11/27

12:10 am-8:55 pm

1 stop27h 45m

$726

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sun 11/16

11:50 am-1:55 pm

1 stop19h 05m

Seattle/Tacoma Intl

Sun 11/30

1:40 pm-10:45 pm

1 stop16h 05m

$729

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sun 11/16

11:50 am-1:55 pm

1 stop19h 05m

Seattle/Tacoma Intl

Fri 11/28

1:40 pm-10:45 pm

1 stop16h 05m

$730

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sun 10/26

10:15 am-7:35 pm

1 stop25h 20m

Seattle/Tacoma Intl

Sun 11/2

9:30 pm-2:05 pm

1 stop23h 35m

$735

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Mon 9/29

9:10 am-12:30 pm

1 stop19h 20m

Seattle/Tacoma Intl

Tue 10/21

2:15 pm-9:05 pm

1 stop14h 50m

$753

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 35 results
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Best time to book a flight from Osaka to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Osaka with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Osaka to Seattle

What is the cheapest time of day to fly from OSA to SEA?

Find hourly flight availability from Osaka to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

A simple way to save on the total cost of your ticket is to fly from Osaka to Seattle in the morning. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking a flight in the afternoon.

How much does it cost to fly round-trip from Osaka to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated September 11, 2025.
See what other customers who have flown with EVA Air and ANA from Osaka to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
EVA Air
8.4
Very good
1,236 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Entertainment

8.0

Crew

8.6

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
EVA Air
8.4
Very good
1,236 reviews
EVA Air
8.4
Very good
1,236 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Entertainment

8.0

Crew

8.6

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak
ANA
8.4
Very good
961 reviews
EVA Air
8.4
Very good
1,236 reviews

Food

8.1

Boarding

8.4

Overall

8.4

Entertainment

8.0

Crew

8.6

Comfort

8.3

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2025

BKK - TPE

I bought tickets for myself and my friend and had to argue with the checkin person to get our seats together for the return flights I purchased the tickets together weeks ahead of time and did not expect to have to ask for a supervisor to sit together very disappointed in booking through kayak

Related info for your journey

Find useful and relevant information for your journey from Osaka to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Osaka?

    If you book a flight to Seattle from Osaka, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 0 flights from Osaka to Seattle/Tacoma Intl per day from 0 different airlines.

  • How long is the flight from Osaka to Seattle?

    For as low as $1,244, Japan Airlines can have you in Seattle from Osaka in 22h 19m. Osaka and Seattle are separated by a distance of 4999 mi.

  • What are the cheapest airlines to fly from Osaka to Seattle one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $416. Users have also found prices from $418 and $461 on Korean Air and Philippine Airlines, respectively.

  • Can I find deals for flights from Osaka to Seattle that include hotel bookings?

    Yes. In addition to deals on Osaka to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Osaka to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Osaka to Seattle.

  • Can I find deals for business class flights from Osaka to Seattle?

    Yes. Cheapflights offers flight deals from Osaka to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Osaka to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Osaka to Seattle (average of $238). Flying from Osaka to Seattle in June is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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