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$313+ 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OSA
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Find cheap flights from Seattle to Osaka with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Osaka are usually found in September or August, booked 34 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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$590
(Cheapflightsfares)

One-way from

$313
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$819
Provider with most accurate pricing for Seattle/Tacoma Intl-Osaka (OSA) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Osaka (OSA) flights.
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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 ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 29, 2025.

This Flightnetwork deal was found by Cheapflights users on 10/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:40 pmSEA - UKB
1 stop23h 20mANA
Sun 12/217:05 amUKB - SEA
1 stop23h 15mANA
Deal found 10/28$623
This Flightnetwork deal was found by Cheapflights users on 10/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/43:40 pmSEA - ITM
1 stop25h 30mANA
Fri 12/128:20 pmITM - SEA
1 stop34h 00mANA
Deal found 10/28$625
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:00 amSEA - KIX
1 stop16h 40mANA
Thu 12/187:05 amKIX - SEA
1 stop23h 15mANA
Deal found 10/28$627
This Flightnetwork deal was found by Cheapflights users on 10/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/43:40 pmSEA - UKB
1 stop23h 20mANA
Fri 12/129:15 pmUKB - SEA
1 stop33h 05mANA
Deal found 10/28$628
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/273:40 pmSEA - KIX
1 stop23h 55mANA
Thu 12/43:45 pmKIX - SEA
1 stop14h 35mANA
Deal found 10/29$629
This Flightnetwork deal was found by Cheapflights users on 10/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:40 pmSEA - KIX
1 stop13h 40mANA
Sun 12/215:35 pmKIX - SEA
1 stop12h 45mANA
Deal found 10/28$630
This Flightnetwork deal was found by Cheapflights users on 10/28. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/43:40 pmSEA - KIX
1 stop30h 05mANA
Fri 12/129:10 pmKIX - SEA
1 stop33h 10mANA
Deal found 10/28$634
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:40 pmSEA - ITM
1 stop23h 30mANA
Fri 12/126:00 pmITM - SEA
2 stops20h 00mANA
Deal found 10/28$636
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:40 pmSEA - ITM
1 stop22h 50mANA
Thu 11/2011:00 amITM - SEA
1 stop19h 20mANA
Deal found 10/28$637
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:40 pmSEA - KIX
1 stop23h 55mANA
Fri 11/215:35 pmKIX - SEA
1 stop12h 45mANA
Deal found 10/28$640
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Thu 11/273:40 pmSEA - KIX
1 stop13h 40mANA
Fri 12/59:10 pmKIX - SEA
1 stop33h 10mANA
Deal found 10/29$642
This FlightHub deal was found by Cheapflights users on 10/29. 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.
Thu 11/273:40 pmSEA - UKB
1 stop23h 20mANA
Thu 12/47:05 amUKB - SEA
1 stop23h 15mANA
Deal found 10/29$651

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 October 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 - ITM

SEAITM

Seattle/Tacoma Intl

Sun 1/11

3:45 pm-7:30 am

1 stop22h 45m

Osaka Itami

Sun 1/18

4:00 pm-1:20 pm

1 stop14h 20m

$590

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 1/13

3:45 pm-7:30 am

1 stop22h 45m

Osaka Itami

Tue 1/20

4:00 pm-1:20 pm

1 stop14h 20m

$599

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Thu 12/4

3:40 pm-10:10 am

1 stop25h 30m

Osaka Itami

Fri 12/12

8:20 pm-1:20 pm

1 stop34h 00m

$625

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Fri 12/5

3:40 pm-9:10 am

1 stop24h 30m

Osaka Itami

Fri 12/12

2:00 pm-1:20 pm

1 stop16h 20m

$627

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Mon 1/12

3:45 pm-8:10 am

1 stop23h 25m

Osaka Itami

Wed 1/28

3:00 pm-1:20 pm

1 stop15h 20m

$637

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Fri 12/5

3:40 pm-8:00 am

1 stop23h 20m

Kobe

Fri 12/12

9:15 pm-1:20 pm

1 stop33h 05m

$639

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Mon 1/12

3:45 pm-8:00 am

1 stop23h 15m

Kobe

Wed 1/28

7:05 am-1:20 pm

1 stop23h 15m

$661

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Wed 2/4

3:45 pm-8:00 am

1 stop23h 15m

Kobe

Fri 2/20

7:05 am-1:20 pm

1 stop23h 15m

$662

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 11/17

5:30 am-4:40 pm

1 stop18h 10m

Osaka Kansai Intl

Wed 11/26

6:35 pm-10:30 pm

2 stops20h 55m

$669

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Mon 12/1

7:00 am-4:40 pm

1 stop16h 40m

Osaka Kansai Intl

Mon 12/8

6:35 pm-10:30 pm

2 stops20h 55m

$671

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 60 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 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 Seattle-Osaka flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Osaka flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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

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 October 24, 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 33 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 $610). Flying from Seattle to Osaka in January is currently the most expensive (average of $781). 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 October 29, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 35% 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 Thursday at noon 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 50% 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: 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 19m.

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 October 29, 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
994 reviews

Boarding

8.6

Overall

8.4

Entertainment

7.9

Crew

8.7

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
ANA
8.4
Very good
994 reviews
ANA
8.4
Very good
994 reviews

Boarding

8.6

Overall

8.4

Entertainment

7.9

Crew

8.7

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Korean Air
8.4
Very good
1,155 reviews
ANA
8.4
Very good
994 reviews

Boarding

8.6

Overall

8.4

Entertainment

7.9

Crew

8.7

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Japan Airlines
8.3
Very good
1,595 reviews
ANA
8.4
Very good
994 reviews

Boarding

8.6

Overall

8.4

Entertainment

7.9

Crew

8.7

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Asiana Airlines
8.2
Very good
483 reviews
ANA
8.4
Very good
994 reviews

Boarding

8.6

Overall

8.4

Entertainment

7.9

Crew

8.7

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.
Air Canada
7.1
Good
10,371 reviews
ANA
8.4
Very good
994 reviews

Boarding

8.6

Overall

8.4

Entertainment

7.9

Crew

8.7

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Julie,Sep 2025

CGK - HND

Flight attendants are nice, friendly and helpful. Highly recommend to flight with this airline.

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.

  • How long is the flight from Seattle to Osaka?

    A quick flight from Seattle to Osaka can take about 18h 10m. ANA provides one of the quickest options available for as low as $669. 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 $610, was found to be the cheapest airline from Seattle to Osaka.Alternate airlines to your destination round-trip include Delta and ANA. These flights start at 33% lower than the current average price 3 months from now.

  • 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 $56 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 $610). Flying from Seattle to Osaka in January is currently the most expensive (average of $781). 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 Osaka Itami flights
Portland to Kansai Intl flights
Portland to Osaka 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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$610Average$825FlexibilityNo cancel feeOn-time76%
DeltaCheapest$649Average$894FlexibilityNo cancel feeOn-timeN/A
ANACheapest$663Average$920FlexibilityNo cancel feeOn-time80%
Air CanadaCheapest$669Average$802FlexibilityNo cancel feeOn-time67%
Japan AirlinesCheapest$697Average$1,128FlexibilityNo cancel feeOn-time79%
Korean AirCheapest$716Average$1,133FlexibilityNo cancel feeOn-time81%
China EasternCheapest$719Average$756FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$734Average$905FlexibilityNo cancel feeOn-time69%
STARLUX AirlinesCheapest$975Average$1,201FlexibilityNo cancel feeOn-timeN/A
China AirlinesCheapest$1,056Average$1,186FlexibilityNo cancel feeOn-time70%

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