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$372+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — SEA
Mar 23 — Mar 301
Mon 3/23
Mon 3/30
1 adult, Economy
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Cheap 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 February 21, 2026.

This Flightnetwork deal was found by Cheapflights users on 2/18. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/157:45 pm
KIX
-
SEA
1 stop35h 10m
Multiple Airlines
Tue 4/2112:55 am
SEA
-
KIX
1 stop29h 45m
Multiple Airlines
Deal found 2/18$666
This Air Canada deal was found by Cheapflights users on 2/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/116:00 pm
KIX
-
SEA
1 stop20h 20m
Air Canada
Wed 5/275:40 am
SEA
-
KIX
1 stop18h 45m
Air Canada
Deal found 2/20$723
This Air Canada deal was found by Cheapflights users on 2/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/236:00 pm
KIX
-
SEA
1 stop12h 22m
Air Canada
Wed 9/165:40 am
SEA
-
KIX
1 stop18h 45m
Air Canada
Deal found 2/20$727
This Asiana Airlines deal was found by Cheapflights users on 2/20. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:45 pm
KIX
-
SEA
1 stop35h 10m
Asiana Airlines
Sun 5/3112:55 am
SEA
-
KIX
1 stop16h 05m
Asiana Airlines
Deal found 2/20$755
This Air Canada deal was found by Cheapflights users on 2/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 pm
KIX
-
SEA
1 stop13h 05m
Air Canada
Tue 5/57:20 pm
SEA
-
KIX
1 stop29h 05m
Air Canada
Deal found 2/20$778
This Gotogate deal was found by Cheapflights users on 2/17. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/101:10 pm
KIX
-
SEA
1 stop21h 30m
EVA Air
Wed 10/141:30 am
SEA
-
KIX
1 stop16h 40m
EVA Air
Deal found 2/17$784
This Kiwi.com deal was found by Cheapflights users on 2/20. 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.
Tue 5/127:35 am
KIX
-
SEA
2 stops26h 07m
Multiple Airlines
Sun 5/314:30 pm
SEA
-
KIX
1 stop13h 20m
Multiple Airlines
Deal found 2/20$786
This Air Canada deal was found by Cheapflights users on 2/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/166:00 pm
KIX
-
SEA
1 stop12h 20m
Air Canada
Sun 5/315:40 am
SEA
-
KIX
1 stop18h 45m
Air Canada
Deal found 2/20$787
This BusinessClass deal was found by Cheapflights users on 2/19. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/107:35 am
KIX
-
SEA
2 stops26h 57m
Multiple Airlines
Tue 7/143:00 pm
SEA
-
KIX
1 stop33h 25m
Multiple Airlines
Deal found 2/19$792
This EVA Air deal was found by Cheapflights users on 2/21. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:30 pm
KIX
-
SEA
1 stop17h 10m
EVA Air
Sun 9/201:30 am
SEA
-
KIX
1 stop23h 45m
EVA Air
Deal found 2/21$802
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 5/178:30 am
ITM
-
SEA
2 stops25h 12m
Multiple Airlines
Wed 5/204:30 pm
SEA
-
ITM
1 stop22h 55m
Multiple Airlines
Deal found 2/17$914
This Air Canada deal was found by Cheapflights users on 2/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/142:00 pm
ITM
-
SEA
2 stops24h 20m
Air Canada
Fri 5/295:40 am
SEA
-
ITM
2 stops21h 15m
Air Canada
Deal found 2/20$982

Find 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 February 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$666
(Flightnetwork)

One-way from

$372
(Kiwi.com)

Popular in

September

Cheapest in

May

Average price

$974
Provider with most accurate pricing for Osaka (OSA)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Osaka (OSA)-Seattle/Tacoma Intl flights.
Search Deals
From Osaka (OSA) to Seattle/Tacoma Intl
Search Deals
One-way flight from Osaka (OSA) to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($120 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 21, 2026.
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

Tue 6/23

6:00 pm-10:22 pm

1 stop20h 22m

Seattle/Tacoma Intl

Wed 9/16

10:30 am-4:25 pm

1 stop13h 55m

$730

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 5/12

10:40 am-2:55 pm

1 stop20h 15m

Seattle/Tacoma Intl

Sun 5/31

12:55 am-9:35 pm

1 stop28h 40m

$755

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 6/23

6:00 pm-6:32 pm

1 stop16h 32m

Seattle/Tacoma Intl

Wed 9/16

5:40 am-9:00 pm

2 stops23h 20m

$847

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Mon 8/3

2:00 pm-7:45 pm

1 stop21h 45m

Seattle/Tacoma Intl

Sun 8/16

1:55 am-6:05 pm

1 stop24h 10m

$856

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 3/5

7:25 pm-7:16 pm

1 stop16h 51m

Seattle/Tacoma Intl

Mon 3/9

10:10 am-5:40 pm

1 stop15h 30m

$857

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 3/5

7:25 pm-1:55 pm

1 stop35h 30m

Seattle/Tacoma Intl

Sun 3/8

12:10 am-8:50 am

1 stop16h 40m

$861

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Mon 8/3

1:25 pm-4:35 pm

1 stop19h 10m

Seattle/Tacoma Intl

Sun 8/16

1:15 am-12:15 pm

1 stop19h 00m

$872

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Mon 8/3

6:00 pm-9:17 am

1 stop31h 17m

Seattle/Tacoma Intl

Mon 8/17

9:55 am-4:25 pm

1 stop14h 30m

$878

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Sun 5/17

8:30 am-5:42 pm

2 stops25h 12m

Seattle/Tacoma Intl

Wed 5/20

4:30 pm-7:25 am

1 stop22h 55m

$914

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Thu 5/14

2:00 pm-10:20 pm

2 stops24h 20m

Seattle/Tacoma Intl

Fri 5/29

5:40 am-6:55 pm

2 stops21h 15m

$982

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 31 results
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Compare providers for flights from Osaka to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Osaka to Seattle in February.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Osaka-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Osaka-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Osaka-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Osaka-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Osaka-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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 February 21, 2026.
See what other customers who have flown with STARLUX Airlines 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.
STARLUX Airlines
8.9
Very good
274 reviews

Food

8.7

Boarding

8.9

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
STARLUX Airlines
8.9
Very good
274 reviews
STARLUX Airlines
8.9
Very good
274 reviews

Food

8.7

Boarding

8.9

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.
ANA
8.4
Very good
1,098 reviews
STARLUX Airlines
8.9
Very good
274 reviews

Food

8.7

Boarding

8.9

Entertainment

8.8

Crew

9.2

Overall

8.9

Comfort

8.9

Reviews

1 / 10
10.0
Excellent

Anonymous,Jan 2026

SEA - TPE

First time travelled with starlux and had best experience. Food was really good and crew is the best. Entertainment was also best. Having latest movies. I requested for isle seat at the last time and they provided me. Best airline service.

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 1 airline.

  • How long is the flight from Osaka to Seattle?

    For as low as $755, Air Canada can have you in Seattle from Osaka in 20h 15m. Osaka and Seattle are separated by a distance of 5024 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Osaka to Seattle round-trip?

    Air Canada, at $794, was found to be the cheapest airline from Osaka to Seattle.. Users have found that Air Canada is 11% cheaper than the other options available to this destination.

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

    For one-way options, check prices for Korean Air. According to our data, you can fly for as low as $420. Users have also found prices from $424 and $482 on Air Canada and China 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
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Lynnwood
Edmonds
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Renton
Puyallup
Kirkland
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Federal Way
Chehalis

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Osaka to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Kansai Intl to Seattle flights
Osaka Itami to Seattle flights
Kansai Intl to Portland flights

Top airline flying from Osaka to Seattle

Discover the top airline that operate flights from Osaka to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$794Average$1,711FlexibilityNo cancel feeOn-time67%

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