Cheap flights from Seattle to Japan from $379

The month of January is, on average, the cheapest month to fly to Japan from Seattle, with most prices found around $710. If you aren’t able to travel to Japan during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $728.

On average, the least expensive day to fly to Japan from Seattle is on a Sunday. momondo users have found tickets for Sunday departures for as low as $900. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Seattle to Japan on a Friday will generally be more expensive and average around $1,021. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Flying to Japan from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $887 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to Japan, so prices are often more expensive at around $1,036 per ticket.

Fly from Seattle/Tacoma Intl to Tokyo Haneda for the best Seattle/Tacoma Intl - Japan flight prices

You are more likely to see cheaper flights to Japan from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Japan for around $977 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Japan from Seattle for as low as $817 on momondo.

There are 3 cabin classes available to choose from on Seattle to Japan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cathay Pacific, Alaska Airlines, and Delta are the most popular carriers operating from Seattle/Tacoma Intl to Japan

ANA, Delta and Japan Airlines are the top three most popular airlines that fly to Japan from Seattle according to our data. ANA is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Japan. Keep in mind that there are 15 different airlines that fly to Japan on a routine basis, so you have a few additional options to choose from.

Historically, on average around 16% of flights between Seattle and Japan have experienced a delay on any given week. The average delay length over the past 12 months has been 131 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, ANA have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

The number of flights available between Seattle and Japan is 7 per day as of August 2026. The most frequent departure time is 1:00PM, with 80% of daily flights leaving in the afternoon.

52 flights are operational weekly from Seattle to Japan as of August 2026. The most popular departure day for this route is Mon, with 19% of flights per week taking off on this day.