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$455+ Cheap flights from Osaka (OSA) to Seattle (SEA)

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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
OSA — SEA
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheap flight deals from Osaka to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Osaka (OSA) to Seattle (SEA). 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 junio 12, 2025.

Round-trip from

$789
(Mytrip)

One-way from

$455
(Kiwi.com)

Popular in

September

Cheapest in

May

Average price

$967
From Osaka (OSA) to Seattle/Tacoma Intl
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One-way flight from Osaka (OSA) to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 12% potential increase in price ($141 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 Osaka to Seattle

Cheapest flights from Osaka to Seattle
Explore the most affordable flight options available from Osaka to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/42:30 pmKIX - SEA
1 stop14h 15mMultiple Airlines
vie. 7/182:30 pmSEA - KIX
1 stop16h 20mMultiple Airlines
Deal found 6/12$789
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.
mar. 10/71:10 pmKIX - SEA
1 stop22h 10mChina Airlines
jue. 10/301:10 amSEA - KIX
1 stop20h 10mChina Airlines
Deal found 6/11$846
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2012:35 pmKIX - SEA
1 stop17h 26mDelta
mié. 9/312:35 pmSEA - KIX
1 stop16h 25mDelta
Deal found 6/10$864
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 6/231:10 pmKIX - SEA
1 stop22h 20mEVA Air
dom. 6/291:50 amSEA - KIX
1 stop16h 20mEVA Air
Deal found 6/12$898
This oojo 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/186:20 pmKIX - SEA
1 stop32h 30mKorean Air
lun. 9/812:50 pmSEA - KIX
1 stop36h 15mKorean Air
Deal found 6/12$899
This Philippine 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/203:20 pmKIX - SEA
1 stop19h 55mPhilippine Airlines
mié. 9/311:35 pmSEA - KIX
1 stop22h 45mPhilippine Airlines
Deal found 6/12$903
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/111:25 pmKIX - SEA
1 stop19h 10mSTARLUX Airlines
lun. 7/141:15 amSEA - KIX
1 stop19h 00mSTARLUX Airlines
Deal found 6/10$928
This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/1010:50 amKIX - SEA
1 stop17h 55mAsiana Airlines
lun. 7/142:30 pmSEA - KIX
1 stop14h 35mAsiana Airlines
Deal found 6/11$948
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.
lun. 8/186:00 pmITM - SEA
1 stop12h 25mANA
lun. 9/84:30 pmSEA - ITM
1 stop22h 55mANA
Deal found 6/12$1,051
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/49:10 pmKIX - SEA
1 stop33h 15mANA
sáb. 8/94:30 pmSEA - KIX
1 stop32h 20mANA
Deal found 6/12$1,076
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/267:00 pmITM - SEA
2 stops40h 15mMultiple Airlines
sáb. 8/24:30 pmSEA - ITM
1 stop22h 55mMultiple Airlines
Deal found 6/11$1,207
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2012:00 pmITM - SEA
2 stops26h 15mUnited Airlines
mié. 9/37:00 amSEA - ITM
2 stops18h 05mUnited Airlines
Deal found 6/10$1,410

Cheapflights Fare Finder

Customize your flight search to find flights from Osaka to Seattle 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 junio 12, 2025.
Use the filters below to find and compare flights from Osaka to Seattle that are best for you.

Fly from

Osaka

Fly to

Seattle

Route

Depart

Return

Price

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

vie. 7/4

2:30 pm-12:45 pm

1 stop14h 15m

Seattle/Tacoma Intl

vie. 7/18

2:30 pm-10:50 pm

1 stop16h 20m

$789

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

mar. 10/7

1:10 pm-7:20 pm

1 stop22h 10m

Seattle/Tacoma Intl

jue. 10/30

1:10 am-1:20 pm

1 stop20h 10m

$846

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

mié. 8/20

12:35 pm-2:01 pm

1 stop17h 26m

Seattle/Tacoma Intl

mié. 9/3

12:35 pm-9:00 pm

1 stop16h 25m

$864

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

lun. 6/23

1:10 pm-7:30 pm

1 stop22h 20m

Seattle/Tacoma Intl

dom. 6/29

1:50 am-10:10 am

1 stop16h 20m

$898

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

lun. 8/18

6:20 pm-10:50 am

1 stop32h 30m

Seattle/Tacoma Intl

lun. 9/8

12:50 pm-5:05 pm

1 stop36h 15m

$899

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

mié. 8/20

3:20 pm-7:15 pm

1 stop19h 55m

Seattle/Tacoma Intl

mié. 9/3

11:35 pm-2:20 pm

1 stop22h 45m

$903

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

vie. 7/11

1:25 pm-4:35 pm

1 stop19h 10m

Seattle/Tacoma Intl

lun. 7/14

1:15 am-12:15 pm

1 stop19h 00m

$928

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

jue. 7/10

10:50 am-12:45 pm

1 stop17h 55m

Seattle/Tacoma Intl

lun. 7/14

2:30 pm-9:05 pm

1 stop14h 35m

$948

OsakaSeattle

ITM - SEA

ITMSEA

Osaka Itami

lun. 8/18

6:00 pm-2:25 pm

1 stop12h 25m

Seattle/Tacoma Intl

lun. 9/8

4:30 pm-7:25 am

1 stop22h 55m

$1,051

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

lun. 8/4

9:10 pm-2:25 pm

1 stop33h 15m

Seattle/Tacoma Intl

sáb. 8/9

4:30 pm-4:50 pm

1 stop32h 20m

$1,076

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 37 results
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Best time to book a flight from Osaka to Seattle

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

What is the cheapest time of day to fly from OSA to SEA?

Find hourly flight availability from Osaka to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Osaka to Seattle in the morning. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking a flight in the afternoon.

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated junio 12, 2025.
Get a feel of what it's like to fly with STARLUX Airlines, EVA Air and Korean Air from Osaka to Seattle by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
STARLUX Airlines
9.1
Wonderful
178 reviews

Entertainment

8.9

Overall

9.1

Boarding

9.0

Food

8.8

Crew

9.3

Comfort

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
9.1
Wonderful
178 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Entertainment

8.9

Overall

9.1

Boarding

9.0

Food

8.8

Crew

9.3

Comfort

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
1,202 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Entertainment

8.9

Overall

9.1

Boarding

9.0

Food

8.8

Crew

9.3

Comfort

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
1,088 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Entertainment

8.9

Overall

9.1

Boarding

9.0

Food

8.8

Crew

9.3

Comfort

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
1,490 reviews
STARLUX Airlines
9.1
Wonderful
178 reviews

Entertainment

8.9

Overall

9.1

Boarding

9.0

Food

8.8

Crew

9.3

Comfort

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

Entertainment

8.9

Overall

9.1

Boarding

9.0

Food

8.8

Crew

9.3

Comfort

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 Osaka to Seattle. 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 into for flights to Seattle from Osaka?

    If you book a flight to Seattle from Osaka, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 0 flights from Osaka to Seattle/Tacoma Intl per day from 1 airline.

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

    China Airlines, at $846, was found to be the cheapest airline from Osaka to Seattle.Alternate airlines to your destination round-trip include Delta and EVA Air. Users have found that China Airlines is 12% cheaper than the other options available to this destination.

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

    For one-way options, check prices for China Airlines. According to our data, you can fly for as low as $503. Users have also found prices from $556 and $561 on EVA Air and Philippine Airlines, respectively.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Osaka to Seattle (average of $238). Flying from Osaka to Seattle in July is currently the most expensive (average of $391). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Osaka to Seattle

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

Top airline flying from Osaka to Seattle

Discover the top airline that operate flights from Osaka to Seattle. 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Asiana AirlinesCheapest$852Average$923FlexibilityNo cancel feeOn-time76%

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