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Cheap flights from Osaka Kansai Intl Airport to Seattle from $375

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Osaka Kansai Intl Airport to Seattle departing on 11/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Osaka Kansai Intl Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:40 pm - 2:30 pmKIX-SEA
14h 50m1 stop
Multiple Airlines Logo
2:40 pm - 10:45 pmSEA-KIX
16h 05m1 stop
$709Multiple Airlines
Find Deal
Sat, Mar 14 - Sat, Mar 21
Multiple Airlines Logo
11:50 am - 1:45 pmKIX-SEA
18h 55m1 stop
Multiple Airlines Logo
1:40 pm - 10:45 pmSEA-KIX
16h 05m1 stop
$710Multiple Airlines
Find Deal
Fri, Dec 26 - Sun, Jan 4
Multiple Airlines Logo
2:35 pm - 8:00 amKIX-SEA
34h 25m1 stop
Multiple Airlines Logo
3:40 pm - 10:20 pmSEA-KIX
13h 40m1 stop
$745Multiple Airlines
Find Deal
Fri, Nov 28 - Fri, Dec 5
Philippine Airlines Logo
10:15 am - 6:40 pmKIX-SEA
25h 25m1 stop
Philippine Airlines Logo
9:30 pm - 7:35 pmSEA-KIX
29h 05m1 stop
$764Philippine Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
STARLUX Airlines Logo
12:20 pm - 4:05 pmKIX-SEA
19h 45m1 stop
STARLUX Airlines Logo
12:45 am - 12:50 pmSEA-KIX
20h 05m1 stop
$812STARLUX Airlines
Find Deal
Sat, Mar 14 - Fri, Mar 20
Asiana Airlines Logo
10:30 am - 1:55 pmKIX-SEA
20h 25m1 stop
Asiana Airlines Logo
12:10 am - 8:40 amSEA-KIX
15h 30m1 stop
$829Asiana Airlines
Find Deal
Thu, Dec 25 - Mon, Dec 29
Asiana Airlines Logo
10:30 am - 1:55 pmKIX-SEA
20h 25m1 stop
Asiana Airlines Logo
12:10 am - 8:40 amSEA-KIX
15h 30m1 stop
$832Asiana Airlines
Find Deal
Thu, Dec 25 - Mon, Dec 29
STARLUX Airlines Logo
12:20 pm - 3:05 pmKIX-SEA
19h 45m1 stop
STARLUX Airlines Logo
11:45 pm - 11:10 amSEA-KIX
18h 25m1 stop
$847STARLUX Airlines
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Thu, Nov 13 - Mon, Nov 17
EVA Air Logo
6:10 pm - 7:02 amKIX-SEA
29h 52m2 stops
EVA Air Logo
12:10 am - 9:55 amSEA-KIX
16h 45m1 stop
$937EVA Air
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Tue, Nov 25 - Mon, Dec 1
EVA Air Logo
10:55 am - 7:02 amKIX-SEA
37h 07m2 stops
EVA Air Logo
12:10 am - 11:55 amSEA-KIX
18h 45m1 stop
$967EVA Air
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Sat, Nov 29 - Fri, Dec 5

STARLUX Airlines flights from Osaka Kansai Intl Airport to Seattle

Our best STARLUX Airlines deals on Osaka Kansai Intl Airport to Seattle flight tickets
STARLUX Airlines
Mar 14
KIX12:20 pmOsaka Kansai Intl
19h 45m
1 stop
SEA4:05 pmSeattle/Tacoma Intl
Mar 20
SEA12:45 amSeattle/Tacoma Intl
20h 05m
1 stop
KIX12:50 pmOsaka Kansai Intl
$812
Find similar
STARLUX Airlines
Nov 13
KIX12:20 pmOsaka Kansai Intl
19h 45m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
Nov 17
SEA11:45 pmSeattle/Tacoma Intl
18h 25m
1 stop
KIX11:10 amOsaka Kansai Intl
$847
Find similar
STARLUX Airlines
Nov 13
KIX12:20 pmOsaka Kansai Intl
19h 45m
1 stop
SEA3:05 pmSeattle/Tacoma Intl
Nov 17
SEA11:45 pmSeattle/Tacoma Intl
18h 25m
1 stop
KIX11:10 amOsaka Kansai Intl
$850
Find similar

Asiana Airlines flights from Osaka Kansai Intl Airport to Seattle

Our best Asiana Airlines deals on Osaka Kansai Intl Airport to Seattle flight tickets
Asiana Airlines
Dec 25
KIX10:30 amOsaka Kansai Intl
20h 25m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
Dec 29
SEA12:10 amSeattle/Tacoma Intl
15h 30m
1 stop
KIX8:40 amOsaka Kansai Intl
$829
Find similar
Asiana Airlines
Dec 25
KIX10:30 amOsaka Kansai Intl
20h 25m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
Dec 29
SEA12:10 amSeattle/Tacoma Intl
15h 30m
1 stop
KIX8:40 amOsaka Kansai Intl
$832
Find similar
Asiana Airlines
Dec 25
KIX10:30 amOsaka Kansai Intl
20h 25m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
Dec 29
SEA12:10 amSeattle/Tacoma Intl
15h 30m
1 stop
KIX8:40 amOsaka Kansai Intl
$833
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Osaka Kansai Intl Airport 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, momondo users made 832,500 searches. Data last updated October 30, 2025.
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

Sat 3/14

3:40 pm-2:30 pm

1 stop14h 50m

Seattle/Tacoma Intl

Sat 3/21

2:40 pm-10:45 pm

1 stop16h 05m

$709

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 12/26

11:50 am-1:45 pm

1 stop18h 55m

Seattle/Tacoma Intl

Sun 1/4

1:40 pm-10:45 pm

1 stop16h 05m

$710

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Fri 11/28

2:35 pm-8:00 am

1 stop34h 25m

Seattle/Tacoma Intl

Fri 12/5

3:40 pm-10:20 pm

1 stop13h 40m

$745

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 11/25

10:15 am-6:40 pm

1 stop25h 25m

Seattle/Tacoma Intl

Tue 12/2

9:30 pm-7:35 pm

1 stop29h 05m

$764

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sat 3/14

12:20 pm-4:05 pm

1 stop19h 45m

Seattle/Tacoma Intl

Fri 3/20

12:45 am-12:50 pm

1 stop20h 05m

$812

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 12/25

10:30 am-1:55 pm

1 stop20h 25m

Seattle/Tacoma Intl

Mon 12/29

12:10 am-8:40 am

1 stop15h 30m

$829

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 12/25

10:30 am-1:55 pm

1 stop20h 25m

Seattle/Tacoma Intl

Mon 12/29

12:10 am-8:40 am

1 stop15h 30m

$832

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Thu 11/13

12:20 pm-3:05 pm

1 stop19h 45m

Seattle/Tacoma Intl

Mon 11/17

11:45 pm-11:10 am

1 stop18h 25m

$847

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Tue 11/25

6:10 pm-7:02 am

2 stops29h 52m

Seattle/Tacoma Intl

Mon 12/1

12:10 am-9:55 am

1 stop16h 45m

$937

OsakaSeattle

KIX - SEA

KIXSEA

Osaka Kansai Intl

Sat 11/29

10:55 am-7:02 am

2 stops37h 07m

Seattle/Tacoma Intl

Fri 12/5

12:10 am-11:55 am

1 stop18h 45m

$967

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Osaka Kansai Intl Airport to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Osaka Kansai Intl Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $916. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Osaka Kansai Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,184.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Osaka Kansai Intl Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as $1,034 when looking at flights departing in the morning. Flights to Seattle are more costly in the afternoon, with an average ticket price of $1,134. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Osaka Kansai Intl Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Osaka Kansai Intl Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Osaka Kansai Intl Airport to Seattle (KIX to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Osaka Kansai Intl Airport to Seattle

Direct flights

None
There are no direct flights from Osaka Kansai Intl Airport to Seattle. There are no popular flight routes from Osaka Kansai Intl Airport to Seattle.
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  • How far is Osaka Kansai Intl to Seattle/Tacoma Intl by plane?

    The distance between Osaka Kansai Intl and Seattle/Tacoma Intl is about 5017.2 mi. By plane, this route typically takes 14h 50m.

  • When did momondo last update prices for flights from Osaka Kansai Intl Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Osaka Kansai Intl Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How old do you have to be to fly from Osaka Kansai Intl Airport to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Osaka Kansai Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Puyallup
Marysville
Redmond
Tukwila
Federal Way
Lakewood
Cle Elum
Fife
Centralia
Kirkland
Shoreline
Westport

Why use momondo?

Why should I use momondo to find a flight deal from Osaka to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Osaka to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Osaka to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Osaka on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Osaka to Seattle?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Osaka to Seattle.

I’m not ready to book a flight from Osaka to Seattle right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Osaka to Seattle flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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