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$341+ 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 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — SEA
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
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 November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$655
(Cheapflightsfares)

One-way from

$341
(Kiwi.com)

Popular in

September

Cheapest in

May
Provider with most accurate pricing for Osaka (OSA)-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Osaka (OSA)-Seattle/Tacoma Intl flights.
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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 ($88 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($21 potential savings vs. average RT price).
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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 November 26, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 11/25. 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 12/247:00 amKIX - SEA
1 stop20h 35mAlaska Airlines
Thu 1/87:00 amSEA - KIX
1 stop18h 45mAlaska Airlines
Deal found 11/25$655
This Gotogate deal was found by Cheapflights users on 11/25. 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.
Mon 12/156:10 pmKIX - SEA
1 stop31h 50mKorean Air
Sun 3/2212:00 pmSEA - KIX
1 stop30h 45mKorean Air
Deal found 11/25$711
This Trip.com deal was found by Cheapflights users on 11/25. 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.
Mon 12/1512:20 pmKIX - SEA
1 stop19h 45mSTARLUX Airlines
Sat 3/2112:45 amSEA - KIX
1 stop18h 25mSTARLUX Airlines
Deal found 11/25$774
This Flightnetwork deal was found by Cheapflights users on 11/25. 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.
Mon 12/157:10 pmKIX - SEA
2 stops41h 06mMultiple Airlines
Sun 3/223:40 pmSEA - KIX
1 stop34h 00mMultiple Airlines
Deal found 11/25$782
This Gotogate deal was found by Cheapflights users on 11/25. 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.
Wed 12/2410:50 amKIX - SEA
2 stops28h 56mMultiple Airlines
Thu 1/85:50 amSEA - KIX
2 stops21h 45mMultiple Airlines
Deal found 11/25$783
This oojo deal was found by Cheapflights users on 11/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2212:55 pmKIX - SEA
1 stop22h 15mEVA Air
Sun 12/2812:10 amSEA - KIX
1 stop18h 45mEVA Air
Deal found 11/24$820
This Asiana Airlines deal was found by Cheapflights users on 11/25. 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.
Thu 12/2510:30 amKIX - SEA
1 stop20h 25mAsiana Airlines
Mon 12/2912:10 amSEA - KIX
1 stop15h 40mAsiana Airlines
Deal found 11/25$858
This FlightHub deal was found by Cheapflights users on 11/25. 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.
Wed 12/247:25 pmKIX - SEA
1 stop35h 30mAsiana Airlines
Wed 1/712:10 amSEA - KIX
1 stop15h 40mAsiana Airlines
Deal found 11/25$870
This Mytrip deal was found by Cheapflights users on 11/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:30 pmITM - SEA
2 stops19h 01mMultiple Airlines
Thu 1/812:30 pmSEA - ITM
1 stop14h 25mMultiple Airlines
Deal found 11/25$990
This Cheapflightsfares deal was found by Cheapflights users on 11/25. 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 12/242:40 pmITM - SEA
1 stop12h 10mJapan Airlines
Thu 1/812:30 pmSEA - ITM
1 stop14h 25mJapan Airlines
Deal found 11/25$1,046
This Gotogate deal was found by Cheapflights users on 11/25. 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.
Wed 12/242:00 pmITM - SEA
2 stops17h 31mAir Canada
Thu 1/88:00 pmSEA - ITM
2 stops29h 55mAir Canada
Deal found 11/25$1,047
This Air Canada deal was found by Cheapflights users on 11/24. 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 12/222:40 pmITM - SEA
2 stops16h 51mMultiple Airlines
Mon 12/298:00 pmSEA - ITM
2 stops29h 55mMultiple Airlines
Deal found 11/24$1,273

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 November 26, 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

Wed 12/24

7:00 am-10:35 am

1 stop20h 35m

Seattle/Tacoma Intl

Thu 1/8

7:00 am-6:45 pm

1 stop18h 45m

$655

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Mon 12/15

6:10 pm-9:00 am

1 stop31h 50m

Seattle/Tacoma Intl

Sun 3/22

12:00 pm-10:45 am

1 stop30h 45m

$711

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Fri 1/23

2:40 pm-10:40 am

1 stop13h 00m

Seattle/Tacoma Intl

Fri 1/30

12:20 pm-7:55 pm

1 stop14h 35m

$783

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 1/14

8:45 pm-11:54 am

2 stops32h 09m

Seattle/Tacoma Intl

Thu 1/15

3:45 pm-10:20 pm

1 stop13h 35m

$789

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 4/29

3:10 pm-4:10 pm

1 stop17h 00m

Seattle/Tacoma Intl

Mon 5/4

1:15 am-2:00 pm

1 stop20h 45m

$795

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 12/24

7:50 am-2:31 pm

2 stops23h 41m

Seattle/Tacoma Intl

Thu 1/8

3:45 pm-10:20 pm

1 stop13h 35m

$805

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Mon 12/15

7:10 pm-2:31 pm

2 stops36h 21m

Seattle/Tacoma Intl

Sun 3/22

8:00 pm-10:10 am

2 stops46h 10m

$805

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 1/23

2:35 pm-8:00 am

1 stop34h 25m

Seattle/Tacoma Intl

Fri 1/30

5:50 am-8:35 pm

2 stops21h 45m

$809

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 1/23

9:00 am-9:00 am

1 stop17h 00m

Seattle/Tacoma Intl

Fri 1/30

11:00 am-10:45 am

1 stop30h 45m

$818

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Mon 12/22

12:55 pm-6:10 pm

1 stop22h 15m

Seattle/Tacoma Intl

Sun 12/28

12:10 am-11:55 am

1 stop18h 45m

$820

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/26

Showing 1-10 of 41 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 November.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Osaka-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

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 November 26, 2025.

A simple way to save on the total cost of your ticket is to fly from Osaka to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight in the morning.

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 November 26, 2025.
See what other customers who have flown with STARLUX Airlines, 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.
STARLUX Airlines
8.9
Very good
235 reviews

Crew

9.2

Entertainment

8.9

Overall

8.9

Comfort

8.9

Food

8.7

Boarding

9.0

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
STARLUX Airlines
8.9
Very good
235 reviews
STARLUX Airlines
8.9
Very good
235 reviews

Crew

9.2

Entertainment

8.9

Overall

8.9

Comfort

8.9

Food

8.7

Boarding

9.0

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
EVA Air
8.4
Very good
1,284 reviews
STARLUX Airlines
8.9
Very good
235 reviews

Crew

9.2

Entertainment

8.9

Overall

8.9

Comfort

8.9

Food

8.7

Boarding

9.0

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them
ANA
8.4
Very good
1,011 reviews
STARLUX Airlines
8.9
Very good
235 reviews

Crew

9.2

Entertainment

8.9

Overall

8.9

Comfort

8.9

Food

8.7

Boarding

9.0

Reviews

1 / 9
10.0
Excellent

Chad,Nov 2025

TPE - SEA

Starlux Airlines was amazing. No complaints on anything with them

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 $795, Alaska Airlines can have you in Seattle from Osaka in 17h. 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 are the cheapest airlines to fly from Osaka to Seattle one-way?

    For one-way options, check prices for Hainan Airlines. According to our data, you can fly for as low as $418. Users have also found prices from $464 and $471 on Air Canada 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
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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.
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