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$354+ 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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Osaka are usually found in October or February, booked 21 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 July 29, 2025.

Round-trip from

$687
(oojo)

One-way from

$354
(oojo)

Popular in

December

Cheapest in

October

Average price

$962
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. 6% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This oojo deal was found by Cheapflights users on 7/29. 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.
Tue 8/262:30 pmSEA - KIX
1 stop27h 10mAsiana Airlines
Wed 9/37:10 pmKIX - SEA
1 stop33h 20mAsiana Airlines
Deal found 7/29$687
This oojo deal was found by Cheapflights users on 7/27. 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 9/154:50 pmSEA - UKB
2 stops25h 20mKorean Air
Mon 9/296:40 pmUKB - SEA
2 stops42h 56mKorean Air
Deal found 7/27$700
This CrystalTravel deal was found by Cheapflights users on 7/27. 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.
Mon 8/257:00 amSEA - KIX
1 stop15h 50mANA
Thu 9/46:35 pmKIX - SEA
1 stop11h 50mANA
Deal found 7/27$700
This oojo deal was found by Cheapflights users on 7/27. 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.
Wed 9/34:50 pmSEA - KIX
2 stops26h 30mKorean Air
Tue 9/912:35 pmKIX - SEA
2 stops25h 01mKorean Air
Deal found 7/27$703
This CrystalTravel deal was found by Cheapflights users on 7/28. 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 9/711:35 pmSEA - KIX
1 stop22h 45mPhilippine Airlines
Sun 9/2110:20 amKIX - SEA
1 stop24h 55mPhilippine Airlines
Deal found 7/28$713
This Cheapflightsfares deal was found by Cheapflights users on 7/27. 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.
Tue 10/144:30 pmSEA - ITM
1 stop22h 55mANA
Tue 10/213:00 pmITM - SEA
1 stop15h 25mANA
Deal found 7/27$722
This FlightHub deal was found by Cheapflights users on 7/26. 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 9/224:30 pmSEA - UKB
1 stop13h 15mANA
Wed 10/17:05 amUKB - SEA
1 stop23h 20mANA
Deal found 7/26$729
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Sun 11/303:40 pmSEA - ITM
1 stop33h 30mUnited Airlines
Wed 12/31:00 pmITM - SEA
1 stop17h 20mUnited Airlines
Deal found 7/28$736
This FlightHub deal was found by Cheapflights users on 7/29. 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 9/62:55 pmSEA - KIX
1 stop33h 30mAir Canada
Mon 9/226:05 pmKIX - SEA
1 stop16h 31mAir Canada
Deal found 7/29$736
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Sun 9/217:00 amSEA - KIX
1 stop15h 50mUnited Airlines
Tue 9/308:25 amKIX - SEA
1 stop22h 00mUnited Airlines
Deal found 7/26$737
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Mon 8/256:25 amSEA - ITM
2 stops19h 45mMultiple Airlines
Thu 9/411:00 amITM - SEA
2 stops18h 28mMultiple Airlines
Deal found 7/27$799

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 July 29, 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 8/26

2:30 pm-9:40 am

1 stop27h 10m

Osaka Kansai Intl

Wed 9/3

7:10 pm-12:30 pm

1 stop33h 20m

$687

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Mon 9/15

5:59 pm-10:10 am

2 stops24h 11m

Kobe

Mon 9/29

6:40 pm-9:36 pm

2 stops42h 56m

$700

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 10/28

5:30 am-4:40 pm

1 stop19h 10m

Osaka Kansai Intl

Fri 11/7

3:40 pm-1:20 pm

1 stop14h 40m

$700

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 9/3

4:50 pm-11:20 am

2 stops26h 30m

Osaka Kansai Intl

Tue 9/9

12:35 pm-9:36 pm

2 stops25h 01m

$703

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 9/7

11:35 pm-2:20 pm

1 stop22h 45m

Osaka Kansai Intl

Sun 9/21

10:20 am-7:15 pm

1 stop24h 55m

$713

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 10/14

4:30 pm-7:25 am

1 stop22h 55m

Osaka Itami

Tue 10/21

3:00 pm-2:25 pm

1 stop15h 25m

$722

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Mon 9/22

4:30 pm-9:45 pm

1 stop13h 15m

Kobe

Wed 10/1

7:05 am-2:25 pm

1 stop23h 20m

$729

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sat 9/6

2:55 pm-4:25 pm

1 stop33h 30m

Osaka Kansai Intl

Mon 9/22

6:05 pm-6:36 pm

1 stop16h 31m

$736

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 1/18

7:05 am-4:40 pm

1 stop16h 35m

Osaka Kansai Intl

Wed 2/25

8:25 am-1:20 pm

1 stop21h 55m

$737

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 8/25

6:25 am-6:10 pm

2 stops19h 45m

Osaka Itami

Thu 9/4

11:00 am-1:28 pm

2 stops18h 28m

$799

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 32 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 July 25, 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 21 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 $877). Flying from Seattle to Osaka in June is currently the most expensive (average of $1,312). 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 July 29, 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 (NRT) – chosen by Cheapflights users on 33% 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 $816.

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: 3h 05m.

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 July 29, 2025.
Get a feel of what it's like to fly with STARLUX Airlines, EVA Air, and Korean Air 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.
STARLUX Airlines
9.0
Wonderful
198 reviews

Boarding

9.0

Entertainment

9.0

Comfort

8.9

Crew

9.3

Food

8.8

Overall

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
STARLUX Airlines
9.0
Wonderful
198 reviews
STARLUX Airlines
9.0
Wonderful
198 reviews

Boarding

9.0

Entertainment

9.0

Comfort

8.9

Crew

9.3

Food

8.8

Overall

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
EVA Air
8.4
Very good
1,221 reviews
STARLUX Airlines
9.0
Wonderful
198 reviews

Boarding

9.0

Entertainment

9.0

Comfort

8.9

Crew

9.3

Food

8.8

Overall

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Korean Air
8.4
Very good
1,121 reviews
STARLUX Airlines
9.0
Wonderful
198 reviews

Boarding

9.0

Entertainment

9.0

Comfort

8.9

Crew

9.3

Food

8.8

Overall

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
ANA
8.4
Very good
922 reviews
STARLUX Airlines
9.0
Wonderful
198 reviews

Boarding

9.0

Entertainment

9.0

Comfort

8.9

Crew

9.3

Food

8.8

Overall

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.
Japan Airlines
8.3
Very good
1,535 reviews
STARLUX Airlines
9.0
Wonderful
198 reviews

Boarding

9.0

Entertainment

9.0

Comfort

8.9

Crew

9.3

Food

8.8

Overall

9.0

Reviews

1 / 7
10.0
Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

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 10 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

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

    Asiana Airlines, at $687, was found to be the cheapest airline from Seattle to Osaka.Alternate airlines to your destination round-trip include Korean Air and ANA. These flights start at 30% 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 ($354), Korean Air ($380), and ANA ($388).

  • 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 $60 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 $877). Flying from Seattle to Osaka in June is currently the most expensive (average of $1,312). 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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$648Average$891FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$669Average$963FlexibilityNo cancel feeOn-time67%
ANACheapest$672Average$1,132FlexibilityNo 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$1,105FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$963Average$1,159FlexibilityNo cancel feeOn-time74%
China AirlinesCheapest$999Average$1,186FlexibilityNo cancel feeOn-time70%

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