What is the cheapest airline that flies from Seattle/Tacoma Intl to Osaka?

Asiana Airlines, ANA, and Japan Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Osaka

Which layover airport offers the lowest fares from Seattle to Osaka?

Flights via San Francisco (SFO) offer the lowest average round-trip price of $763.

What airlines fly to Osaka?

ANA, Japan Airlines and Air Canada are the top three most popular airlines that fly to Osaka from Seattle according to our data. ANA is the first choice among our users, with 67% of people opting to fly with this airline when traveling to Osaka. Keep in mind that there are 5 different airlines that fly to Osaka on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Seattle and Osaka?

Tokyo (HND) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Seattle to Osaka?

Tokyo (HND) has the shortest average layover time for this route: 1h 48m.

Which layover airport has the shortest travel time from Seattle to Osaka?

Flights connecting via Tokyo (HND) have the shortest average one-way travel time: 13h 18m.

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

Prices for flights from Seattle/Tacoma Intl Airport to Osaka are refreshed on a daily basis.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Osaka?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Osaka is 5 as of May 2026.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Osaka.

What documentation or ID do you need to fly to Osaka?

The travel and health documents you'll need for your trip to Osaka may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Osaka. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$427 Cheap Flights from Seattle to Osaka in 2026

Q: What is the typical price of a round-trip flight between Seattle and Osaka?

Prices are currently low for flights on this route. Typical prices usually range from $1,135 to $836. The lowest price recently found on this route was $858.

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Find the cheapest flights from Seattle to Osaka

Round-trip

One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

12:10 am - 9:35 pm

SEA

KIX

29h 25m

1 stop

7:45 pm - 3:15 pm

KIX

SEA

35h 30m

1 stop

$858Asiana Airlines

Sun, Sep 27 - Wed, Oct 14

12:10 am - 6:30 pm

SEA

KIX

26h 20m

1 stop

7:45 pm - 3:15 pm

KIX

SEA

35h 30m

1 stop

$860Asiana Airlines

Sun, Oct 4 - Wed, Oct 14

12:10 am - 9:00 am

SEA

KIX

16h 50m

1 stop

10:30 am - 3:15 pm

KIX

SEA

20h 45m

1 stop

$861Asiana Airlines

Sun, Aug 30 - Fri, Sep 11

11:50 am - 7:50 pm

SEA

ITM

15h 00m

1 stop

2:40 pm - 9:50 am

ITM

SEA

12h 10m

1 stop

$1,084Alaska Airlines

Tue, Nov 3 - Thu, Nov 12

11:50 am - 7:50 pm

SEA

ITM

15h 00m

1 stop

2:40 pm - 2:42 pm

ITM

SEA

17h 02m

2 stops

$1,094Alaska Airlines

Tue, Nov 3 - Thu, Nov 12

1:15 am - 10:30 am

SEA

UKB

17h 15m

1 stop

11:40 am - 4:10 pm

UKB

SEA

20h 30m

1 stop

$1,114STARLUX Airlines

Tue, Sep 29 - Thu, Oct 8

1:15 am - 10:30 am

SEA

UKB

17h 15m

1 stop

11:40 am - 4:10 pm

UKB

SEA

20h 30m

1 stop

$1,115STARLUX Airlines

Tue, Sep 29 - Sat, Oct 10

1:30 am - 10:00 am

SEA

UKB

16h 30m

1 stop

11:00 am - 7:20 pm

UKB

SEA

24h 20m

1 stop

$1,152EVA Air

Wed, Sep 30 - Mon, Oct 12

4:30 pm - 10:05 am

SEA

ITM

25h 35m

1 stop

8:20 pm - 2:25 pm

ITM

SEA

34h 05m

1 stop

$1,183ANA

Sun, Aug 23 - Mon, Aug 31

4:30 pm - 7:25 am

SEA

ITM

22h 55m

1 stop

4:40 pm - 2:25 pm

ITM

SEA

13h 45m

1 stop

$1,184ANA

Wed, Sep 9 - Wed, Sep 16

Asiana Airlines flights from Seattle to Osaka

Our best Asiana Airlines deals on Seattle to Osaka flight tickets

Asiana Airlines

Sep 27

SEA12:10 amSeattle/Tacoma Intl

29h 25m

1 stop

KIX9:35 pmOsaka Kansai Intl

Oct 14

KIX7:45 pmOsaka Kansai Intl

35h 30m

1 stop

SEA3:15 pmSeattle/Tacoma Intl

$858

Asiana Airlines

Oct 4

SEA12:10 amSeattle/Tacoma Intl

16h 50m

1 stop

KIX9:00 amOsaka Kansai Intl

Oct 8

KIX7:45 pmOsaka Kansai Intl

35h 30m

1 stop

SEA3:15 pmSeattle/Tacoma Intl

$860

Asiana Airlines

Aug 30

SEA12:10 amSeattle/Tacoma Intl

16h 50m

1 stop

KIX9:00 amOsaka Kansai Intl

Sep 11

KIX10:30 amOsaka Kansai Intl

20h 45m

1 stop

SEA3:15 pmSeattle/Tacoma Intl

$861

United Airlines flights from Seattle to Osaka

Our best United Airlines deals on Seattle to Osaka flight tickets

United Airlines

Aug 30

SEA4:30 pmSeattle/Tacoma Intl

32h 35m

1 stop

ITM5:05 pmOsaka Itami

Sep 10

ITM12:50 pmOsaka Itami

17h 35m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$1,209

United Airlines

Aug 30

SEA7:06 amSeattle/Tacoma Intl

17h 59m

2 stops

ITM5:05 pmOsaka Itami

Sep 11

ITM12:50 pmOsaka Itami

17h 35m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$1,213

United Airlines

Aug 30

SEA7:06 amSeattle/Tacoma Intl

17h 59m

2 stops

ITM5:05 pmOsaka Itami

Sep 11

ITM12:50 pmOsaka Itami

17h 35m

1 stop

SEA2:25 pmSeattle/Tacoma Intl

$1,214

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 9/27

12:10 am-9:35 pm

1 stop29h 25m

Osaka Kansai Intl

Wed 10/14

7:45 pm-3:15 pm

1 stop35h 30m

$858

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 10/4

12:10 am-6:30 pm

1 stop26h 20m

Osaka Kansai Intl

Wed 10/14

7:45 pm-3:15 pm

1 stop35h 30m

$860

SeattleOsaka

SEA - KIX

SEAKIX

Seattle/Tacoma Intl

Sun 8/30

12:10 am-9:00 am

1 stop16h 50m

Osaka Kansai Intl

Fri 9/11

10:30 am-3:15 pm

1 stop20h 45m

$861

Quickest round-trip

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 11/3

11:50 am-7:50 pm

1 stop15h 00m

Osaka Itami

Thu 11/12

2:40 pm-9:50 am

1 stop12h 10m

$1,084

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Tue 11/3

11:50 am-7:50 pm

1 stop15h 00m

Osaka Itami

Thu 11/12

2:40 pm-2:42 pm

2 stops17h 02m

$1,094

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Tue 9/29

1:15 am-10:30 am

1 stop17h 15m

Kobe

Thu 10/8

11:40 am-4:10 pm

1 stop20h 30m

$1,114

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Tue 9/29

1:15 am-10:30 am

1 stop17h 15m

Kobe

Sat 10/10

11:40 am-4:10 pm

1 stop20h 30m

$1,115

SeattleKobe

SEA - UKB

SEAUKB

Seattle/Tacoma Intl

Wed 9/30

1:30 am-10:00 am

1 stop16h 30m

Kobe

Mon 10/12

11:00 am-7:20 pm

1 stop24h 20m

$1,152

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Sun 8/23

4:30 pm-10:05 am

1 stop25h 35m

Osaka Itami

Mon 8/31

8:20 pm-2:25 pm

1 stop34h 05m

$1,183

SeattleOsaka

SEA - ITM

SEAITM

Seattle/Tacoma Intl

Wed 9/9

4:30 pm-7:25 am

1 stop22h 55m

Osaka Itami

Wed 9/16

4:40 pm-2:25 pm

1 stop13h 45m

$1,184

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Osaka

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

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Seattle and Osaka?

What is the cheapest month to fly to Osaka?

In general, March is the cheapest month to fly from Seattle to Osaka. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $363. If you are unable to visit Osaka during the month of March, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $370.

How far in advance should I book a flight from Seattle to Osaka?

You are more likely to see cheaper flights to Osaka from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Osaka for around $851 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Osaka from Seattle for as low as $667 on momondo.

Can stopping save me money on Seattle to Osaka flights?

You could potentially save up to 43% on your flight if you consider stops on a Seattle to Osaka flight.

How have Seattle to Osaka flight prices changed over time?

As of May 2026, prices for Seattle to Osaka flights are approximately 31% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Osaka

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Osaka according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Osaka (SEA to OSA) flight deals and tips

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

Fastest flight time	13h 15m
Direct flights	None

The fastest flight from Seattle to Osaka takes 13h 15m

There are no direct flights from Seattle to Osaka. There are no popular flight routes from Seattle to Osaka.

Search flight deals

Frequently asked questions about flying from Seattle to Osaka

How far is Seattle/Tacoma Intl to Osaka by plane?
The distance between Seattle/Tacoma Intl and Osaka is about 4994.7 mi. Flights usually cover this in 13h 15m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Osaka?
Prices for flights from Seattle/Tacoma Intl Airport to Osaka are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Osaka?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Osaka is 5 as of May 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Osaka?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Osaka.
What documentation or ID do you need to fly to Osaka?
The travel and health documents you'll need for your trip to Osaka may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Osaka. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Seattle to Osaka?
momondo data reveals that the most frequently booked airline on the route from Seattle to Osaka is ANA, representing 51% of all bookings. The subsequent popular airlines are Asiana Airlines at 15%, Japan Airlines at 11%, and Air Canada at 8%.

Best airlines flying from Seattle to Osaka

Compare and see reviews for airlines that fly from Seattle to Osaka with momondo

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom $370	Free Cancellation	Rating 7.9 12,345 reviews	Search Alaska Airlines flights
Asiana Airlines	PriceFrom $565	Free Cancellation	Rating 8.1 530 reviews	Search Asiana Airlines flights
ANA	PriceFrom $650	Free Cancellation	Rating 8.3 1,207 reviews	Search ANA flights
Air Canada	PriceFrom $669	Free Cancellation	Rating 7.1 11,004 reviews	Search Air Canada flights
Japan Airlines	PriceFrom $697	Free Cancellation	Rating 8.3 1,809 reviews	Search Japan Airlines flights

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Why use momondo?

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

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

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

Yes. momondo allows you to filter the results for Seattle to Osaka flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Seattle and Osaka by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Seattle to Osaka now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Osaka and let you know when they change.

An easier way to manage your Osaka trip

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Fly into one of these airports located in Osaka

Osaka Itami Airport

Osaka Kansai Intl Airport

Cheap flights from Seattle to Osaka from $427

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Osaka departing on 7/28. 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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Asiana Airlines flights from Seattle to Osaka

Our best Asiana Airlines deals on Seattle to Osaka flight tickets

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How to get the cheapest flight ticket from Seattle to Osaka

What is the typical price of a round-trip flight between Seattle and Osaka?

What is the cheapest month to fly to Osaka?

How far in advance should I book a flight from Seattle to Osaka?

Can stopping save me money on Seattle to Osaka flights?

How have Seattle to Osaka flight prices changed over time?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Osaka?

What airlines fly to Osaka?

Which airport is the most popular layover for flights between Seattle and Osaka?

Which layover airport offers the lowest fares from Seattle to Osaka?

Which layover airport has the shortest travel time from Seattle to Osaka?

Which layover airport has the shortest connection time from Seattle to Osaka?

When to book flights from Seattle to Osaka

Cheap Seattle to Osaka (SEA to OSA) flight deals and tips

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

Fastest flight time

Direct flights

Frequently asked questions about flying from Seattle to Osaka

Best airlines flying from Seattle to Osaka

Compare and see reviews for airlines that fly from Seattle to Osaka with momondo

Traveling to a place near Osaka?

Why use momondo?

An easier way to manage your Osaka trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Japan

Fly into one of these airports located in Osaka

Airports listed have a maximum distance of 22.5 mi from Osaka

Fly your favorite airline to Osaka

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Osaka

List of cabin classes available on flights landing in Osaka. Availability may vary depending on flight origin and airline.

Popular cities in Japan

Popular flights according to clicks in the last 7 days on momondo

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According to popular flight searches on momondo this year

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