Cheap flights from Seattle to Osaka from $368

In general, January 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 $688. If you are unable to visit Osaka during the month of January, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $744.

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 $914 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 $645 on momondo.

You could potentially save up to 52% on your flight if you consider stops on a Seattle to Osaka flight.

As of September 2026, prices for Seattle to Osaka flights are approximately 36% cheaper when compared to flights at the same time last year.

Delta, Korean Air, and Cathay Pacific are the most popular carriers operating from Seattle/Tacoma Intl 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 64% 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.

Tokyo (HND) was the most common stop: 57% of momondo users choosing 1-stop flights on this route connected there.

Flights via Tokyo (HND) offer the lowest average round-trip price of $719.

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

Vancouver (YVR) has the shortest average layover time for this route: 1h 38m.