August is the cheapest month to fly this route, with average fares around $1233 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $1471 | $1331 | Peak | |
| June 2026 | $1465 | $1232 | ||
| July 2026 | $1271 | $1212 | ||
| August 2026 | $1233 | $1190 | Best |
Departing on Monday offers the lowest average fares at $1324. Friday departures are the most expensive at $1444, a difference of $120.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Seattle to Tokyo is August, with average round-trip fares around $1233. The lowest fare found in August is $1190.
Monday departures are the cheapest, averaging $1324 round trip. The most expensive day is Friday at $1444.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $1471 compared to $1233 in the cheapest month. June is a solid middle-ground option at $1465.
Flying in August instead of May can save you approximately $238 per round trip. The cheapest month averages $1233 while the most expensive averages $1471.
Airlines, flight times, price calendar, and more for Seattle to Tokyo
View SEA → NRT Details