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$304+ 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 12/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Osaka are usually found in August or October, booked 6 days in advance, depart on a Tuesday or Saturday and return on a Wednesday

Cheap 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 September 11, 2025.

Round-trip from

$572
(FlightHub)

One-way from

$304
(FlightHub)

Popular in

December

Cheapest in

August

Average price

$950
From Seattle/Tacoma Intl to Osaka (OSA)
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One-way flight from Seattle/Tacoma Intl to Osaka (OSA)
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Highest demand for flights based on searches. 7% potential increase in price ($83 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 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 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 September 11, 2025.

This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/212:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Thu 12/1810:50 amKIX - SEA
1 stop20h 05mAsiana Airlines
Deal found 9/11$572
This lol.travel deal was found by Cheapflights users on 9/9. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:15 pmSEA - KIX
1 stop29h 10mAir Canada
Tue 9/306:05 pmKIX - SEA
1 stop16h 31mAir Canada
Deal found 9/9$589
This CrystalTravel deal was found by Cheapflights users on 9/9. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/212:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Mon 11/1710:50 amKIX - SEA
1 stop20h 05mAsiana Airlines
Deal found 9/9$593
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/812:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Mon 11/179:00 amKIX - SEA
1 stop21h 55mAsiana Airlines
Deal found 9/11$599
This CrystalTravel deal was found by Cheapflights users on 9/9. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:00 amSEA - KIX
1 stop15h 50mANA
Wed 10/155:30 pmKIX - SEA
1 stop12h 55mANA
Deal found 9/9$608
This FlightHub deal was found by Cheapflights users on 9/9. 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.
Mon 11/1012:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Wed 11/268:25 pmKIX - SEA
1 stop34h 30mAsiana Airlines
Deal found 9/9$609
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/212:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Mon 11/109:00 amKIX - SEA
1 stop21h 55mAsiana Airlines
Deal found 9/10$613
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/112:10 amSEA - KIX
1 stop27h 45mAsiana Airlines
Tue 12/1610:50 amKIX - SEA
1 stop20h 05mAsiana Airlines
Deal found 9/11$619
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/287:00 amSEA - KIX
1 stop15h 50mANA
Tue 10/75:30 pmKIX - SEA
1 stop12h 55mANA
Deal found 9/11$627
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/252:15 pmSEA - KIX
1 stop35h 35mAsiana Airlines
Wed 10/17:10 pmKIX - SEA
1 stop33h 20mAsiana Airlines
Deal found 9/10$628
This FlightHub deal was found by Cheapflights users on 9/9. 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 9/244:30 pmSEA - UKB
1 stop13h 15mANA
Wed 10/157:05 amUKB - SEA
1 stop23h 20mANA
Deal found 9/9$630
This FlightHub deal was found by Cheapflights users on 9/9. 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 9/247:00 amSEA - KIX
1 stop15h 50mANA
Fri 10/36:45 amKIX - SEA
1 stop23h 40mANA
Deal found 9/9$631

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 September 11, 2025.
Use the filters below to find and compare flights from Seattle to Osaka that are best for you.

Fly from

Seattle

Fly to

Osaka

Route

Depart

Return

Price

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 11/11

12:10 am-8:55 pm

1 stop27h 45m

Osaka Kansai Intl

Tue 11/25

9:00 am-1:55 pm

1 stop21h 55m

$599

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 11/8

12:10 am-9:40 am

1 stop16h 30m

Osaka Kansai Intl

Tue 11/18

5:00 pm-1:55 pm

1 stop13h 55m

$649

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 11/30

12:10 am-8:55 pm

1 stop27h 45m

Osaka Kansai Intl

Thu 12/18

9:00 am-1:55 pm

1 stop21h 55m

$649

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/24

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Fri 10/3

4:50 pm-9:53 pm

2 stops21h 03m

$650

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 9/28

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Tue 10/7

4:50 pm-9:53 pm

2 stops21h 03m

$650

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 11/11

3:40 pm-8:10 am

1 stop23h 30m

Osaka Itami

Thu 11/20

3:00 pm-1:20 pm

1 stop15h 20m

$660

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Tue 3/3

3:45 pm-8:00 am

1 stop23h 15m

Kobe

Tue 3/17

7:05 am-2:20 pm

1 stop23h 15m

$664

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 11/9

3:40 pm-8:00 am

1 stop23h 20m

Kobe

Mon 11/17

9:15 pm-1:20 pm

1 stop33h 05m

$664

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 11/9

3:40 pm-8:00 am

1 stop23h 20m

Kobe

Fri 11/14

7:05 am-1:20 pm

1 stop23h 15m

$673

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Sun 11/9

7:00 am-7:30 am

2 stops31h 30m

Osaka Itami

Mon 11/17

8:20 pm-1:20 pm

1 stop34h 00m

$676

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 58 results
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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

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Osaka. Price data was last updated on August 29, 2025.

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 6 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Osaka (average of $866). Flying from Seattle to Osaka in June is currently the most expensive (average of $1,310). 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 SEA to OSA?

Find hourly flight availability from Seattle to Osaka. 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.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 32% on flights from Seattle to Osaka by exploring options for tickets in the evening.

What is the cheapest day to fly from Seattle to Osaka?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Osaka. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Osaka flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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.

Tokyo (HND) – chosen by Cheapflights users on 43% 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.

Tokyo (HND) is the most affordable 1-stop option, with an average round-trip price of $778.

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 (NRT) offer the fastest connection on this route, with an average layover time of 2h 23m.

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 September 11, 2025.
Get a feel of what it's like to fly with ANA, Korean Air, and Japan Airlines 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.
ANA
8.4
Very good
961 reviews

Crew

8.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
ANA
8.4
Very good
961 reviews
ANA
8.4
Very good
961 reviews

Crew

8.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Korean Air
8.4
Very good
1,139 reviews
ANA
8.4
Very good
961 reviews

Crew

8.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Japan Airlines
8.3
Very good
1,559 reviews
ANA
8.4
Very good
961 reviews

Crew

8.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Asiana Airlines
8.2
Very good
479 reviews
ANA
8.4
Very good
961 reviews

Crew

8.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me
Air Canada
7.1
Good
10,000 reviews
ANA
8.4
Very good
961 reviews

Crew

8.7

Boarding

8.6

Entertainment

7.9

Overall

8.4

Food

7.7

Comfort

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

SFO - NRT

ANA ground and flight crew are the best their is They are now officially my Airline of choice Crew are very attentive, friendly, sincere, helpful and respond to queries accurately, promptly and gives you the peace of mind when travelling Salute to the World’s Best Airline for me

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 11 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 15h 50m. Asiana Airlines provides one of the quickest options available for as low as $650. Airlines will cover a distance of 5024 mi. This flight may include one or multiple stops.

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

    Asiana Airlines, at $648, was found to be the cheapest airline from Seattle to Osaka.Alternate airlines to your destination round-trip include Delta and Air Canada. These flights start at 33% 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 ($322), Air Canada ($339), and Korean Air ($356).

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

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

  • Where are the most common layover locations when flying from Seattle to Osaka?

    Seattle to Osaka flights have a layover in Tokyo most of the time.

  • What are some popular things to do or see while on a layover in Tokyo?

    Akihabara Electric Town, Tsukiji Outer Market, and Tokyo Tower are the most popular attractions in Tokyo if you're in need of something to do during your layover. Akihabara Electric Town, Tsukiji Outer Market, and Tokyo Tower can be visited by traveling about 10.3 mi, 7.9 mi, and 7.9 mi respectively from Tokyo Haneda. Travelers can book a car rental at Tokyo Haneda for about $63 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Seattle to Osaka flights?

    The least popular layover on flights from Seattle to Osaka is Vancouver.

  • 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, February is the cheapest month in which you can book a flight from Seattle to Osaka (average of $866). Flying from Seattle to Osaka in June is currently the most expensive (average of $1,310). 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
Nishinomiya

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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.
Seattle to Kansai Intl flights
Seattle to Itami flights
Portland to Kansai Intl flights
Portland to Itami flights
Pasco to Kansai Intl flights

Top 10 airlines flying from Seattle to Osaka

Discover the top 10 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$648Average$856FlexibilityNo cancel feeOn-time76%
DeltaCheapest$649Average$972FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$669Average$848FlexibilityNo cancel feeOn-time67%
ANACheapest$681Average$951FlexibilityNo cancel feeOn-time80%
Japan AirlinesCheapest$697Average$1,089FlexibilityNo cancel feeOn-time79%
Korean AirCheapest$716Average$1,133FlexibilityNo cancel feeOn-time81%
China EasternCheapest$719Average$756FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$797Average$905FlexibilityNo cancel feeOn-time69%
STARLUX AirlinesCheapest$918Average$1,111FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$963Average$1,159FlexibilityNo cancel feeOn-time74%

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