What are the cheapest airlines flying from Osaka Kansai Intl Airport to Seattle round-trip?

Flying on Asiana Airlines is currently your cheapest option to Seattle, with prices starting at $720. Additional round-trip tickets that might be worth considering are offered by China Airlines and STARLUX Airlines, with the lowest prices starting at $814 and $865, respectively. You may be able to fly from Osaka Kansai Intl Airport to Seattle for 25% less than the average price by searching for these airlines.

What are the cheapest airlines to fly from Osaka Kansai Intl Airport to Seattle one-way?

The cheapest airline one-way is China Airlines, with whom users have recently found tickets for as low as $493. However, be on the lookout for offers from Philippine Airlines and EVA Air, as they are both options that can get you from Osaka Kansai Intl Airport to Seattle for a low price.

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

Currently, January is the cheapest month in which you can book a flight from Osaka Kansai Intl Airport to Seattle (average of $238). Flying from Osaka Kansai Intl Airport to Seattle in June is currently the most expensive (average of $389). 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 day to fly from Osaka Kansai Intl Airport to Seattle?

Travelers seeking maximum savings on their Osaka Kansai Intl Airport to Seattle flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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.

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).

What is the cheapest day to fly round-trip from Osaka Kansai Intl Airport to Seattle?

It’s generally more expensive to depart on a Wednesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

What is the cheapest month to fly from Osaka Kansai Intl Airport to Seattle?

Our data shows that May tends to be the cheapest month to fly to Seattle from Osaka Kansai Intl Airport. Users have commonly found prices around $948 for the month, but tickets can be as low as $520. Due to multiple factors, prepare for potentially higher prices in September.

What airport do you fly into for flights to Seattle from Osaka Kansai Intl?

Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Osaka Kansai Intl to Seattle. 1 airline have flights to Seattle/Tacoma Intl from Osaka Kansai Intl on a regular basis. Booking flights from Osaka Kansai Intl to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 0 inbound flights from Osaka Kansai Intl per day.

Can I find deals for flights from Kansai Intl to Seattle that include hotel bookings?

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

How can I find direct flights from Kansai Intl to Seattle?

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

Can I find deals for business class flights from Kansai Intl to Seattle?

Yes. Cheapflights offers flight deals from Kansai Intl 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.

$440+ Flights from Osaka Kansai Intl Airport to Seattle

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Cheap flight deals from Kansai Intl to Seattle

Round-trip from	$687 (Gotogate)
One-way from	$440 (Kiwi.com)
Popular in	August
Cheapest in	February
Average price	$985

From Osaka Kansai Intl to Seattle/Tacoma Intl

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One-way flight from Osaka Kansai Intl to Seattle/Tacoma Intl

Search Deals

Highest demand for flights based on searches. 19% potential increase in price ($233 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($39 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 Kansai Intl to Seattle

Cheapest flights from Kansai Intl to Seattle
Explore the most affordable flight options available from Kansai Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

Tue 9/2312:35 pmKIX - SEA

1 stop15h 55mMultiple Airlines

Mon 9/292:15 pmSEA - KIX

1 stop35h 35mMultiple Airlines

Deal found 7/30

$687

Thu 9/2510:50 amKIX - SEA

1 stop17h 40mAsiana Airlines

Sat 9/272:15 pmSEA - KIX

1 stop27h 25mAsiana Airlines

Deal found 7/30

$720

Tue 9/232:00 pmKIX - SEA

1 stop21h 20mChina Airlines

Sun 9/281:10 amSEA - KIX

1 stop18h 50mChina Airlines

Deal found 7/30

$814

Fri 9/263:10 pmKIX - SEA

1 stop17h 00mSTARLUX Airlines

Fri 9/261:15 amSEA - KIX

1 stop19h 00mSTARLUX Airlines

Deal found 7/30

$865

Fri 9/121:10 pmKIX - SEA

1 stop22h 20mEVA Air

Thu 9/1812:30 amSEA - KIX

1 stop17h 40mEVA Air

Deal found 7/28

$886

Wed 8/273:20 pmKIX - SEA

1 stop19h 55mPhilippine Airlines

Wed 9/311:35 pmSEA - KIX

1 stop22h 45mPhilippine Airlines

Deal found 7/28

$914

Best flights from Kansai Intl to Seattle
Discover carefully curated flight deals from Kansai Intl to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 30, 2025.

Tue 9/2312:35 pmKIX - SEA

1 stop15h 55mMultiple Airlines

Mon 9/292:15 pmSEA - KIX

1 stop35h 35mMultiple Airlines

Deal found 7/30

$687

Thu 9/2510:50 amKIX - SEA

1 stop17h 40mAsiana Airlines

Sat 9/272:15 pmSEA - KIX

1 stop27h 25mAsiana Airlines

Deal found 7/30

$720

Tue 9/232:00 pmKIX - SEA

1 stop21h 20mChina Airlines

Sun 9/281:10 amSEA - KIX

1 stop18h 50mChina Airlines

Deal found 7/30

$814

Fri 9/263:10 pmKIX - SEA

1 stop17h 00mSTARLUX Airlines

Fri 9/261:15 amSEA - KIX

1 stop19h 00mSTARLUX Airlines

Deal found 7/30

$865

Fri 9/121:10 pmKIX - SEA

1 stop22h 20mEVA Air

Thu 9/1812:30 amSEA - KIX

1 stop17h 40mEVA Air

Deal found 7/28

$886

Wed 8/273:20 pmKIX - SEA

1 stop19h 55mPhilippine Airlines

Wed 9/311:35 pmSEA - KIX

1 stop22h 45mPhilippine Airlines

Deal found 7/28

$914

Last-minute flights from Kansai Intl to Seattle
Discover last-minute flight deals from Kansai Intl to Seattle. Data last updated July 30, 2025 and is based on user searches.

Mon 8/46:30 pmKIX - SEA

2 stops32h 23mEVA Air

Fri 8/81:10 amSEA - KIX

1 stop24h 05mEVA Air

Deal found 7/30

$1,090

Mon 8/49:10 amKIX - SEA

1 stop19h 35mAsiana Airlines

Sat 8/92:30 pmSEA - KIX

1 stop33h 20mAsiana Airlines

Deal found 7/30

$1,127

Mon 8/41:25 pmKIX - SEA

1 stop19h 10mSTARLUX Airlines

Fri 8/81:15 amSEA - KIX

1 stop19h 00mSTARLUX Airlines

Deal found 7/30

$1,349

Mon 8/47:05 pmKIX - SEA

1 stop16h 40mChina Airlines

Sat 8/95:59 pmSEA - KIX

2 stops26h 51mChina Airlines

Deal found 7/30

$1,398

Mon 8/47:35 pmKIX - SEA

2 stops39h 30mCathay Pacific

Sat 8/97:55 pmSEA - KIX

3 stops27h 00mCathay Pacific

Deal found 7/29

$2,093

Wed 8/63:20 pmKIX - SEA

1 stop19h 55mMultiple Airlines

Fri 8/82:30 pmSEA - KIX

1 stop27h 10mMultiple Airlines

Deal found 7/28

$1,147

Wed 8/68:25 amKIX - SEA

2 stops21h 00mUnited Airlines

Thu 8/712:20 amSEA - KIX

2 stops22h 30mUnited Airlines

Deal found 7/28

$3,166

Mon 8/187:10 pmKIX - SEA

1 stop33h 35mAsiana Airlines

Mon 9/82:15 pmSEA - KIX

1 stop27h 25mAsiana Airlines

Deal found 7/29

$964

Mon 8/181:25 pmKIX - SEA

1 stop19h 10mSTARLUX Airlines

Sun 9/71:15 amSEA - KIX

1 stop20h 45mSTARLUX Airlines

Deal found 7/30

$1,040

Wed 8/202:00 pmKIX - SEA

2 stops34h 07mChina Airlines

Tue 9/21:40 amSEA - KIX

1 stop19h 10mChina Airlines

Deal found 7/30

$930

Wed 8/273:20 pmKIX - SEA

1 stop19h 55mPhilippine Airlines

Wed 9/311:35 pmSEA - KIX

1 stop22h 45mPhilippine Airlines

Deal found 7/28

$914

Sat 8/3012:35 pmKIX - SEA

1 stop16h 10mMultiple Airlines

Sat 9/132:15 pmSEA - KIX

1 stop27h 25mMultiple Airlines

Deal found 7/30

$697

One-way flights from Kansai Intl to Seattle
Search for one-way flight options from Kansai Intl to Seattle. Find affordable one-way fares based on user searches. Data last updated July 30, 2025.

Sun 9/146:15 pmKIX - SEA

2 stops40h 59mMultiple Airlines

Deal found 7/30

$440

Sun 9/141:10 pmKIX - SEA

1 stop22h 35mChina Airlines

Deal found 7/30

$493

Sun 10/53:20 pmKIX - SEA

1 stop19h 55mPhilippine Airlines

Deal found 7/29

$530

Thu 9/1111:10 amKIX - SEA

1 stop24h 20mEVA Air

Deal found 7/30

$543

Fri 9/1912:35 pmKIX - SEA

1 stop14h 05mKorean Air

Deal found 7/30

$625

Wed 8/69:10 amKIX - SEA

1 stop19h 35mAsiana Airlines

Deal found 7/28

$662

Sun 10/54:20 pmKIX - SEA

3 stops45h 26mCathay Pacific

Deal found 7/29

$1,139

Cheapflights Fare Finder

Use the filters below to find and compare flights from Osaka Kansai Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 9/23

12:35 pm-12:30 pm

1 stop15h 55m

Seattle/Tacoma Intl

Mon 9/29

2:15 pm-5:50 pm

1 stop35h 35m

$687

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 9/25

10:50 am-12:30 pm

1 stop17h 40m

Seattle/Tacoma Intl

Sat 9/27

2:15 pm-9:40 am

1 stop27h 25m

$720

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 9/23

2:00 pm-7:20 pm

1 stop21h 20m

Seattle/Tacoma Intl

Sun 9/28

1:10 am-12:00 pm

1 stop18h 50m

$814

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 9/26

3:10 pm-4:10 pm

1 stop17h 00m

Seattle/Tacoma Intl

Fri 9/26

1:15 am-12:15 pm

1 stop19h 00m

$865

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 9/12

1:10 pm-7:30 pm

1 stop22h 20m

Seattle/Tacoma Intl

Thu 9/18

12:30 am-10:10 am

1 stop17h 40m

$886

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Wed 8/27

3:20 pm-7:15 pm

1 stop19h 55m

Seattle/Tacoma Intl

Wed 9/3

11:35 pm-2:20 pm

1 stop22h 45m

$914

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sun 9/14

6:15 pm-7:14 pm

2 stops40h 59m

$440

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sun 9/14

1:10 pm-7:45 pm

1 stop22h 35m

$493

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sun 10/5

3:20 pm-7:15 pm

1 stop19h 55m

$530

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 9/11

11:10 am-7:30 pm

1 stop24h 20m

$543

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 13 results

Best time to book a flight from Kansai Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Kansai Intl 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 Kansai Intl Airport to Seattle

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

Unlike at noon, when flights are generally more expensive, you can save up to 44% on flights from Osaka Kansai Intl Airport to Seattle by exploring options for tickets in the morning.

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with STARLUX Airlines, EVA Air, and Korean Air from Osaka Kansai Intl Airport to Seattle 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

199 reviews

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

199 reviews

STARLUX Airlines

9.0

Wonderful

199 reviews

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

1,222 reviews

STARLUX Airlines

9.0

Wonderful

199 reviews

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

199 reviews

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

754 reviews

STARLUX Airlines

9.0

Wonderful

199 reviews

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.

Asiana Airlines

8.2

Very good

467 reviews

STARLUX Airlines

9.0

Wonderful

199 reviews

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

What airport do you fly into for flights to Seattle from Osaka Kansai Intl?
Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Osaka Kansai Intl to Seattle. 1 airline have flights to Seattle/Tacoma Intl from Osaka Kansai Intl on a regular basis. Booking flights from Osaka Kansai Intl to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 0 inbound flights from Osaka Kansai Intl per day.
What are the cheapest airlines flying from Osaka Kansai Intl Airport to Seattle round-trip?
Flying on Asiana Airlines is currently your cheapest option to Seattle, with prices starting at $720. Additional round-trip tickets that might be worth considering are offered by China Airlines and STARLUX Airlines, with the lowest prices starting at $814 and $865, respectively. You may be able to fly from Osaka Kansai Intl Airport to Seattle for 25% less than the average price by searching for these airlines.
What are the cheapest airlines to fly from Osaka Kansai Intl Airport to Seattle one-way?
The cheapest airline one-way is China Airlines, with whom users have recently found tickets for as low as $493. However, be on the lookout for offers from Philippine Airlines and EVA Air, as they are both options that can get you from Osaka Kansai Intl Airport to Seattle for a low price.
Can I find deals for flights from Kansai Intl to Seattle that include hotel bookings?
Yes. In addition to deals on Kansai Intl to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Kansai Intl to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kansai Intl to Seattle.
Can I find deals for business class flights from Kansai Intl to Seattle?
Yes. Cheapflights offers flight deals from Kansai Intl 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 Kansai Intl Airport to Seattle?
Currently, January is the cheapest month in which you can book a flight from Osaka Kansai Intl Airport to Seattle (average of $238). Flying from Osaka Kansai Intl Airport to Seattle in June is currently the most expensive (average of $389). 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

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Other flights to Seattle

Top airline flying from Kansai Intl to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Asiana Airlines	Cheapest$852	Average$926	FlexibilityNo cancel fee	On-time76%

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$440+ Cheap flights from Kansai Intl (KIX) 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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Kansai Intl to Seattle with Cheapflights

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Cheap flight deals from Kansai Intl to Seattle

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Find flight deals from Kansai Intl to Seattle

Cheapest flights from Kansai Intl to SeattleExplore the most affordable flight options available from Kansai Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

Explore the most affordable flight options available from Kansai Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Osaka Kansai Intl Airport to Seattle that are best for you.

Best time to book a flight from Kansai Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Kansai Intl with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Osaka Kansai Intl Airport to Seattle

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

Find hourly flight availability from Kansai Intl 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 July 30, 2025.

Reviews of airlines servicing Seattle

Get a feel of what it's like to fly with STARLUX Airlines, EVA Air, and Korean Air from Osaka Kansai Intl Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Kansai Intl 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 Kansai Intl?

What are the cheapest airlines flying from Osaka Kansai Intl Airport to Seattle round-trip?

What are the cheapest airlines to fly from Osaka Kansai Intl Airport to Seattle one-way?

Can I find deals for flights from Kansai Intl to Seattle that include hotel bookings?

How can I find direct flights from Kansai Intl to Seattle?

Can I find deals for business class flights from Kansai Intl to Seattle?

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

Traveling to a place near Seattle?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Kansai Intl to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Kansai Intl to Seattle

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Cheapest flights from Kansai Intl to Seattle
Explore the most affordable flight options available from Kansai Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 30, 2025.