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$383+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Osaka are usually found in February or October, booked 12 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 June 12, 2025.

Round-trip from

$669
(Air Canada)

One-way from

$383
(oojo)

Popular in

December

Cheapest in

February

Average price

$1,178
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. 4% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Air Canada deal was found by Cheapflights users on 6/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1510:00 amSEA - KIX
1 stop14h 25mAir Canada
Thu 11/67:10 pmKIX - SEA
1 stop16h 16mAir Canada
Deal found 6/11$669
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/15:30 amSEA - ITM
2 stops21h 25mAir Canada
Wed 9/101:00 pmITM - SEA
2 stops16h 06mAir Canada
Deal found 6/10$688
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1512:50 pmSEA - UKB
1 stop29h 10mKorean Air
Mon 10/276:30 pmUKB - SEA
1 stop31h 30mKorean Air
Deal found 6/11$705
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:00 amSEA - KIX
1 stop17h 00mKorean Air
Wed 11/199:15 amKIX - SEA
1 stop16h 45mKorean Air
Deal found 6/11$707
This Gotogate deal was found by Cheapflights users on 6/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1510:00 amSEA - KIX
1 stop14h 25mMultiple Airlines
Thu 10/307:25 amKIX - SEA
2 stops23h 01mMultiple Airlines
Deal found 6/9$725
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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.
Fri 9/511:35 pmSEA - KIX
1 stop22h 45mPhilippine Airlines
Sun 9/143:20 pmKIX - SEA
1 stop19h 55mPhilippine Airlines
Deal found 6/11$728
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1312:45 pmSEA - KIX
1 stop16h 15mDelta
Tue 7/229:05 amKIX - SEA
1 stop20h 55mDelta
Deal found 6/11$745
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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 11/93:40 pmSEA - ITM
1 stop23h 30mANA
Tue 11/184:50 pmITM - SEA
1 stop13h 30mANA
Deal found 6/12$751
This Gotogate deal was found by Cheapflights users on 6/9. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/154:30 pmSEA - UKB
1 stop13h 15mANA
Thu 10/307:05 amUKB - SEA
1 stop23h 15mANA
Deal found 6/9$758
This oojo deal was found by Cheapflights users on 6/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/92:30 pmSEA - KIX
1 stop14h 35mAsiana Airlines
Wed 7/169:10 amKIX - SEA
1 stop19h 35mAsiana Airlines
Deal found 6/11$763
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/154:30 pmSEA - KIX
1 stop13h 20mANA
Thu 10/307:10 amKIX - SEA
2 stops25h 05mANA
Deal found 6/10$764
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/124:30 pmSEA - ITM
1 stop32h 35mUnited Airlines
Tue 10/2112:00 pmITM - SEA
1 stop18h 25mUnited Airlines
Deal found 6/12$766

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 12, 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

Mon 9/1

10:00 am-4:25 pm

1 stop14h 25m

Osaka Kansai Intl

Tue 9/16

6:05 pm-2:16 pm

1 stop12h 11m

$669

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 9/1

5:30 am-6:55 pm

2 stops21h 25m

Osaka Itami

Wed 9/10

1:00 pm-1:06 pm

2 stops16h 06m

$688

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 7/29

10:00 am-7:30 pm

2 stops17h 30m

Osaka Kansai Intl

Thu 9/11

6:05 pm-6:36 pm

1 stop16h 31m

$698

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Sun 9/7

7:00 am-5:30 pm

2 stops42h 30m

Kobe

Wed 9/17

11:00 am-8:37 pm

2 stops25h 37m

$710

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 9/7

7:00 am-9:00 pm

2 stops22h 00m

Osaka Kansai Intl

Wed 9/17

12:35 pm-8:37 pm

2 stops24h 02m

$712

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Fri 9/5

11:35 pm-2:20 pm

1 stop22h 45m

Osaka Kansai Intl

Sun 9/14

3:20 pm-7:15 pm

1 stop19h 55m

$728

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 7/13

12:45 pm-9:00 pm

1 stop16h 15m

Osaka Kansai Intl

Tue 7/22

9:05 am-2:00 pm

1 stop20h 55m

$745

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 9/1

4:30 pm-7:25 am

1 stop22h 55m

Osaka Itami

Tue 9/16

6:00 pm-2:25 pm

1 stop12h 25m

$751

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Tue 8/26

7:00 am-2:50 pm

1 stop15h 50m

Osaka Kansai Intl

Wed 9/3

11:00 am-3:14 pm

2 stops20h 14m

$762

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Wed 7/9

2:30 pm-9:05 pm

1 stop14h 35m

Osaka Kansai Intl

Wed 7/16

9:10 am-12:45 pm

1 stop19h 35m

$763

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 53 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 June 9, 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 11 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 $888). Flying from Seattle to Osaka in June is currently the most expensive (average of $1,324). 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 June 12, 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.

Rainfall in Osaka by month

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

In terms of precipitation, rainfall in Osaka ranges from 1.6 - 7.9 inches per month. June is typically the wettest month, when rainfall can reach 7.9 in. January is typically the driest time to visit Osaka when rainfall is around 1.6 in.

Temperature in Osaka by month

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

If weather is an important factor for your trip to Osaka, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 42.8 F).

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 12, 2025.
Read through reviews of airlines operating flights from Seattle to Osaka, such as STARLUX Airlines, EVA Air and Korean Air. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Entertainment

8.9

Food

8.8

Boarding

9.0

Comfort

9.0

Crew

9.3

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
9.1
Wonderful
178 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Entertainment

8.9

Food

8.8

Boarding

9.0

Comfort

9.0

Crew

9.3

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
1,202 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Entertainment

8.9

Food

8.8

Boarding

9.0

Comfort

9.0

Crew

9.3

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
1,088 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Entertainment

8.9

Food

8.8

Boarding

9.0

Comfort

9.0

Crew

9.3

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
1,489 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Entertainment

8.9

Food

8.8

Boarding

9.0

Comfort

9.0

Crew

9.3

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.
China Airlines
8.3
Very good
738 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Overall

9.1

Entertainment

8.9

Food

8.8

Boarding

9.0

Comfort

9.0

Crew

9.3

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 11 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?

    Air Canada, at $669, was found to be the cheapest airline from Seattle to Osaka.Alternate airlines to your destination round-trip include Korean Air and Philippine Airlines. These flights start at 34% 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 Korean Air ($383), Air Canada ($386), 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, Ueno Koen, and Tsukiji Outer Market are the most popular attractions in Tokyo if you're in need of something to do during your layover. Akihabara Electric Town, Ueno Koen, and Tsukiji Outer Market can be visited by traveling about 10.3 mi, 11.5 mi, and 7.9 mi respectively from Tokyo Haneda. Travelers can book a car rental at Tokyo Haneda for about $67 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 $888). Flying from Seattle to Osaka in June is currently the most expensive (average of $1,324). 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 Seattle?

Book flights to Seattle 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
ANACheapest$672Average$1,163FlexibilityNo cancel feeOn-time80%
Asiana AirlinesCheapest$688Average$905FlexibilityNo cancel feeOn-time76%
Korean AirCheapest$716Average$1,133FlexibilityNo cancel feeOn-time81%
China EasternCheapest$719Average$756FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$749Average$1,066FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$797Average$905FlexibilityNo cancel feeOn-time69%
Japan AirlinesCheapest$850Average$1,128FlexibilityNo cancel feeOn-time79%
STARLUX AirlinesCheapest$918Average$1,105FlexibilityNo cancel feeOn-timeN/A
EVA AirCheapest$963Average$1,159FlexibilityNo cancel feeOn-time74%
Hawaiian AirlinesCheapest$997Average$1,479FlexibilityNo cancel feeOn-time85%

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