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$418+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — SEA
Apr 6 — Apr 131
Sun 4/6
Sun 4/13
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 April 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$714
(Mytrip)

One-way from

$418
(Mytrip)

Popular in

August

Cheapest in

May

Average price

$955
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
Search Deals
One-way flight from Osaka (OSA) to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($167 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 1, 2025.

This Mytrip deal was found by Cheapflights users on 3/31. 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.
Fri 5/911:35 amKIX - SEA
2 stops22h 58mMultiple Airlines
Fri 5/1610:00 amSEA - KIX
2 stops18h 30mMultiple Airlines
Deal found 3/31$714
This Trip.com deal was found by Cheapflights users on 3/31. 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.
Fri 5/93:20 pmKIX - SEA
1 stop19h 55mPhilippine Airlines
Fri 5/1611:35 pmSEA - KIX
1 stop28h 05mPhilippine Airlines
Deal found 3/31$859
This Trip.com deal was found by Cheapflights users on 3/31. 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.
Fri 5/93:10 pmKIX - SEA
1 stop17h 00mSTARLUX Airlines
Thu 5/151:15 amSEA - KIX
1 stop20h 45mSTARLUX Airlines
Deal found 3/31$906
This oojo deal was found by Cheapflights users on 3/30. 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.
Thu 7/172:00 pmKIX - SEA
1 stop21h 45mChina Airlines
Thu 7/241:40 amSEA - KIX
1 stop19h 10mChina Airlines
Deal found 3/30$931
This FlightHub deal was found by Cheapflights users on 3/31. 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 7/910:50 amKIX - SEA
1 stop17h 55mAsiana Airlines
Tue 7/222:30 pmSEA - KIX
1 stop27h 10mAsiana Airlines
Deal found 3/31$1,004
This Air Canada deal was found by Cheapflights users on 3/31. 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 6/106:05 pmKIX - SEA
1 stop12h 08mAir Canada
Thu 6/192:55 pmSEA - KIX
1 stop33h 30mAir Canada
Deal found 3/31$1,054
This EVA Air deal was found by Cheapflights users on 4/1. 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.
Sat 6/1411:10 amKIX - SEA
1 stop24h 20mEVA Air
Fri 7/112:10 amSEA - KIX
1 stop18h 00mEVA Air
Deal found 4/1$1,119
This Delta deal was found by Cheapflights users on 3/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2112:35 pmKIX - SEA
2 stops27h 23mDelta
Mon 9/812:45 pmSEA - KIX
1 stop30h 35mDelta
Deal found 3/31$1,244
This Ovago deal was found by Cheapflights users on 3/31. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/202:35 pmITM - SEA
1 stop12h 00mJapan Airlines
Wed 9/37:15 amSEA - ITM
2 stops18h 20mJapan Airlines
Deal found 3/31$1,290
This Air Canada deal was found by Cheapflights users on 3/31. 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.
Wed 8/202:05 pmITM - SEA
2 stops14h 56mMultiple Airlines
Wed 9/310:00 amSEA - ITM
2 stops16h 55mMultiple Airlines
Deal found 3/31$1,353
This American Airlines deal was found by Cheapflights users on 3/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/214:25 pmITM - SEA
2 stops19h 24mAmerican Airlines
Mon 9/87:15 amSEA - ITM
2 stops19h 25mAmerican Airlines
Deal found 3/31$1,398
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/98:25 amKIX - SEA
2 stops21h 00mUnited Airlines
Mon 7/2112:20 amSEA - KIX
2 stops22h 30mUnited Airlines
Deal found 3/30$1,608

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 April 1, 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 5/9

11:35 am-6:33 pm

2 stops22h 58m

Seattle/Tacoma Intl

Fri 5/16

10:00 am-8:30 pm

2 stops18h 30m

$714

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 5/9

3:20 pm-7:15 pm

1 stop19h 55m

Seattle/Tacoma Intl

Fri 5/16

11:35 pm-7:40 pm

1 stop28h 05m

$859

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 5/9

3:10 pm-4:10 pm

1 stop17h 00m

Seattle/Tacoma Intl

Thu 5/15

1:15 am-2:00 pm

1 stop20h 45m

$906

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 7/17

2:00 pm-7:45 pm

1 stop21h 45m

Seattle/Tacoma Intl

Thu 7/24

1:40 am-12:50 pm

1 stop19h 10m

$931

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 7/9

10:50 am-12:45 pm

1 stop17h 55m

Seattle/Tacoma Intl

Tue 7/22

2:30 pm-9:40 am

1 stop27h 10m

$1,004

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 6/10

6:05 pm-2:13 pm

1 stop12h 08m

Seattle/Tacoma Intl

Thu 6/19

2:55 pm-4:25 pm

1 stop33h 30m

$1,054

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sat 6/14

11:10 am-7:30 pm

1 stop24h 20m

Seattle/Tacoma Intl

Fri 7/11

2:10 am-12:10 pm

1 stop18h 00m

$1,119

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 8/21

12:35 pm-11:58 pm

2 stops27h 23m

Seattle/Tacoma Intl

Mon 9/8

12:45 pm-11:20 am

1 stop30h 35m

$1,244

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Wed 8/20

2:35 pm-10:35 am

1 stop12h 00m

Seattle/Tacoma Intl

Wed 9/3

7:15 am-5:35 pm

2 stops18h 20m

$1,290

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

Wed 8/20

2:05 pm-1:01 pm

2 stops14h 56m

Seattle/Tacoma Intl

Wed 9/3

10:00 am-6:55 pm

2 stops16h 55m

$1,353

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 39 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 April.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
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

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 July is currently the most expensive (average of $411). 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.

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 April 1, 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.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 April 1, 2025.
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Entertainment

9.0

Comfort

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
STARLUX Airlines
9.1
Wonderful
146 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Entertainment

9.0

Comfort

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
EVA Air
8.4
Very good
1,170 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Entertainment

9.0

Comfort

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Korean Air
8.4
Very good
1,052 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Entertainment

9.0

Comfort

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
Japan Airlines
8.3
Very good
1,440 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Entertainment

9.0

Comfort

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.
ANA
8.3
Very good
831 reviews
STARLUX Airlines
9.1
Wonderful
146 reviews

Crew

9.3

Entertainment

9.0

Comfort

9.0

Food

8.9

Boarding

9.0

Overall

9.1

Reviews

1 / 5
10.0
Excellent

Andrew,Jan 2025

LAX - TPE

Crew were attentive from start to finish. Each meal was amazing. IFE screen was huge and had quite a bit of western movies, however the tv shows were lacking.

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 3 different airlines.

  • What are the cheapest airlines flying from Osaka to Seattle round-trip?

    Philippine Airlines, at $859, was found to be the cheapest airline from Osaka to Seattle.Alternate airlines to your destination round-trip include STARLUX Airlines and China Airlines. Users have found that Philippine Airlines is 12% 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 China Airlines. According to our data, you can fly for as low as $489. Users have also found prices from $519 and $579 on Philippine Airlines and Asiana 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 July is currently the most expensive (average of $411). 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

Traveling to a place near Osaka?

Book flights to Osaka if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Lacey
Ocean Shores
Leavenworth
Federal Way
Olympia
Cle Elum
Centralia
Mukilteo
Aberdeen
Shoreline
Lynnwood
Shelton
Silverdale
Redmond
Monroe

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
Itami to Seattle flights
Kansai Intl to Portland flights

Top 3 airlines flying from Osaka to Seattle

Discover the top 3 airlines 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 April 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$838Average$1,344FlexibilityNo cancel feeOn-time67%
Asiana AirlinesCheapest$852Average$926FlexibilityNo cancel feeOn-time76%
ANACheapest$1,863Average$1,863FlexibilityNo cancel feeOn-time80%
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