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$432+ Cheap flights from Seattle (SEA) to Osaka (OSA)

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
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Cheap flight deals from Seattle to Osaka

Cheapest flights from Seattle to Osaka
Explore the most affordable flight options available from Seattle to Osaka. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 21, 2026.

This Booking.com deal was found by Cheapflights users on 6/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2211:00 am
SEA
-
KIX
1 stop33h 45m
Hainan Airlines
Mon 8/312:20 pm
KIX
-
SEA
1 stop34h 40m
Hainan Airlines
Deal found 6/18$845
This Gotogate deal was found by Cheapflights users on 6/17. 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.
Mon 11/3011:55 pm
SEA
-
KIX
1 stop26h 40m
Philippine Airlines
Sun 2/2110:25 am
KIX
-
SEA
1 stop26h 10m
Philippine Airlines
Deal found 6/17$884
This KAYAK deal was found by Cheapflights users on 6/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:00 am
SEA
-
KIX
1 stop33h 45m
Hainan Airlines
Fri 10/232:20 pm
KIX
-
SEA
1 stop34h 40m
Hainan Airlines
Deal found 6/19$905
This KAYAK deal was found by Cheapflights users on 6/16. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1211:00 am
SEA
-
KIX
1 stop33h 45m
Hainan Airlines
Mon 9/282:20 pm
KIX
-
SEA
1 stop34h 40m
Hainan Airlines
Deal found 6/16$915
This Booking.com deal was found by Cheapflights users on 6/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:10 pm
SEA
-
KIX
1 stop28h 25m
Philippine Airlines
Wed 9/163:15 pm
KIX
-
SEA
1 stop20h 50m
Philippine Airlines
Deal found 6/16$926
This FlightHub deal was found by Cheapflights users on 6/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1011:00 am
SEA
-
KIX
1 stop33h 45m
Hainan Airlines
Mon 11/302:35 pm
KIX
-
SEA
1 stop34h 25m
Hainan Airlines
Deal found 6/19$945
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 10/1011:00 am
SEA
-
KIX
1 stop33h 45m
Hainan Airlines
Fri 10/162:20 pm
KIX
-
SEA
1 stop34h 40m
Hainan Airlines
Deal found 6/16$968
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 9/1211:00 am
SEA
-
KIX
1 stop33h 45m
Multiple Airlines
Thu 10/17:50 pm
KIX
-
SEA
2 stops38h 36m
Multiple Airlines
Deal found 6/16$974
This Flightnetwork deal was found by Cheapflights users on 6/20. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/245:50 am
SEA
-
KIX
1 stop18h 35m
Multiple Airlines
Wed 9/168:40 pm
KIX
-
SEA
2 stops33h 42m
Multiple Airlines
Deal found 6/20$977
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 9/1211:00 am
SEA
-
KIX
1 stop33h 45m
Multiple Airlines
Fri 10/27:45 am
KIX
-
SEA
2 stops26h 41m
Multiple Airlines
Deal found 6/16$983
This Trip.com deal was found by Cheapflights users on 6/16. 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.
Tue 10/2011:45 am
SEA
-
KIX
1 stop26h 55m
Cathay Pacific
Sun 11/14:55 pm
KIX
-
SEA
1 stop33h 15m
Cathay Pacific
Deal found 6/16$986
This Korean Air deal was found by Cheapflights users on 6/18. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2910:35 am
SEA
-
UKB
2 stops30h 35m
Korean Air
Tue 1/1911:10 am
UKB
-
SEA
1 stop14h 50m
Korean Air
Deal found 6/18$1,030

Find flight deals from Seattle to Osaka

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Osaka (OSA). 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 June 21, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$845
(Booking.com)

One-way from

$432
(Booking.com)

Popular in

December

Cheapest in

January

Average price

$1,136
Provider with most accurate pricing for Seattle/Tacoma Intl-Osaka (OSA) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Osaka (OSA) flights.
Search Deals
From Seattle/Tacoma Intl to Osaka (OSA)
Search Deals
One-way flight from Seattle/Tacoma Intl to Osaka (OSA)
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($55 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Osaka 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 June 21, 2026.
Use the filters below to find and compare flights from Seattle to Osaka that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 8/26

12:25 pm-2:50 pm

2 stops34h 25m

Osaka Kansai Intl

Wed 9/2

9:05 am-4:07 pm

2 stops23h 02m

$1,040

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Wed 7/29

7:03 am-5:35 pm

2 stops18h 32m

Osaka Itami

Mon 8/10

7:35 pm-10:50 am

1 stop31h 15m

$1,073

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Wed 8/26

4:30 pm-9:45 pm

1 stop13h 15m

Kobe

Wed 9/2

9:15 pm-2:25 pm

1 stop33h 10m

$1,074

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Wed 8/26

4:30 pm-7:25 am

1 stop22h 55m

Osaka Itami

Wed 9/2

4:40 pm-2:25 pm

1 stop13h 45m

$1,075

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 8/22

5:20 pm-2:50 pm

1 stop29h 30m

Osaka Kansai Intl

Wed 9/2

4:55 pm-6:29 pm

1 stop17h 34m

$1,082

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 8/17

1:25 pm-7:50 pm

1 stop14h 25m

Osaka Itami

Fri 8/28

2:30 pm-10:50 am

1 stop12h 20m

$1,091

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 8/17

1:25 pm-7:50 pm

1 stop14h 25m

Osaka Itami

Wed 8/26

2:30 pm-10:50 am

1 stop12h 20m

$1,091

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 8/18

1:25 pm-7:50 pm

1 stop14h 25m

Osaka Itami

Wed 8/26

2:30 pm-10:50 am

1 stop12h 20m

$1,091

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 8/19

7:11 am-2:50 pm

1 stop15h 39m

Osaka Kansai Intl

Tue 8/25

9:20 am-7:14 pm

2 stops25h 54m

$1,095

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 8/24

4:58 pm-2:50 pm

2 stops29h 52m

Osaka Kansai Intl

Fri 8/28

4:55 pm-7:14 pm

2 stops18h 19m

$1,096

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 59 resultsSorted by cheapest first
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Compare providers for flights from Seattle to Osaka

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 Seattle to Osaka in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star

*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 Seattle-Osaka flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Seattle-Osaka flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Seattle-Osaka flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Osaka flights, Cheapflights users trust Ovago the most. Ovago 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 Seattle-Osaka 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 Seattle to Osaka

Have a flexible travel schedule? Discover the best time to fly to Osaka from Seattle 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 Seattle to Osaka

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

Currently, March is the cheapest month in which you can book a flight from Seattle to Osaka (average of $363). Flying from Seattle to Osaka in June is currently the most expensive (average of $718). 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.

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

What’s the top layover airport for flights from Seattle to Osaka?

Share of 1-stop round-trip flights from Seattle to Osaka chosen by Cheapflights users in the past 12 months, using the same layover each way.

Honolulu (HNL) – chosen by Cheapflights users on 38% of 1-stop itineraries from Seattle to Osaka on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Osaka?

Average round-trip fare for 1-stop flights from Seattle to Osaka, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Honolulu (HNL) is the most affordable 1-stop option, with an average round-trip price of $370.

What’s the fastest layover option from Seattle to Osaka?

Shortest average travel time for 1-stop one-way flights from Seattle to Osaka, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Tokyo (HND) have the shortest average one-way travel time for 1-stop routes: 13h 35m.

Which airport typically offers the quickest layover for flights from Seattle to Osaka?

Average layover duration for 1-stop one-way flights from Seattle to Osaka, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Tokyo (HND) offer the fastest connection on this route, with an average layover time of 2h 04m.

How far ahead should I book a flight from Seattle to Osaka?

The price you pay for your flight from Seattle to Osaka may vary depending on when you book. For the best chance of a lower fare, look to book 14 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Osaka

Get insights into the airlines that provide service to Osaka. 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 Osaka. Reviews last updated June 21, 2026.
Get a feel of what it's like to fly with Korean Air,Japan Airlines, andANA from Seattle to Osaka by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,218 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,841 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very good
1,248 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Asiana Airlines
8.1
Very good
545 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Air Canada
7.1
Good
11,229 reviews
Korean Air
8.4
Very good
1,218 reviews

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Osaka. 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 from for flights from Seattle to Osaka?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Osaka. On average, Seattle/Tacoma Intl has 0 outbound flights to Osaka per day from 5 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Seattle to Osaka?

    A quick flight from Seattle to Osaka can take about 13h 15m. Cathay Pacific provides one of the quickest options available for as low as $1,074. Airlines will cover a distance of 5014 mi. This flight may include one or multiple stops.

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

    Alaska Airlines, at $370, was found to be the cheapest airline from Seattle to Osaka.Alternate airlines to your destination round-trip include Asiana Airlines and ANA. These flights start at 58% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from Seattle to Osaka are Asiana Airlines ($304), Air Canada ($328), and Korean Air ($355).

  • What are the most popular routes from Seattle to Osaka?

    While some choose either Seattle/Tacoma Intl - Kobe or Seattle/Tacoma Intl - Osaka Itami, Seattle/Tacoma Intl - Osaka Kansai Intl is the most popular route from Seattle to Osaka.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Osaka 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 Seattle to Osaka?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Osaka (average of $363). Flying from Seattle to Osaka in June is currently the most expensive (average of $718). 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
Nara

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Alternative routes for Seattle to Osaka

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

Top 5 airlines flying from Seattle to Osaka

Discover the top 5 airlines that operate flights from Seattle to Osaka. 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 June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$370Average$438FlexibilityNo cancel feeOn-time75%
Asiana AirlinesCheapest$565Average$675FlexibilityNo cancel feeOn-time76%
ANACheapest$649Average$803FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$669Average$848FlexibilityNo cancel feeOn-time67%
Japan AirlinesCheapest$697Average$1,036FlexibilityNo cancel feeOn-time79%

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