May is the cheapest month to fly this route, with average fares around $321 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $321 | $277 | Best | |
| June 2026 | $337 | $277 | ||
| July 2026 | $330 | $287 | ||
| August 2026 | $345 | $297 | Peak |
Departing on Tuesday offers the lowest average fares at $309. Sunday departures are the most expensive at $361, a difference of $52.
The best time to fly is May. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from New York to Seattle is May, with average round-trip fares around $321. The lowest fare found in May is $277.
Tuesday departures are the cheapest, averaging $309 round trip. The most expensive day is Sunday at $361.
Based on current pricing trends, booking for May travel offers the best value. Avoid August if possible, as fares average $345 compared to $321 in the cheapest month. June is a solid middle-ground option at $337.
Flying in May instead of August can save you approximately $24 per round trip. The cheapest month averages $321 while the most expensive averages $345.
Airlines, flight times, price calendar, and more for New York to Seattle
View JFK → SEA Details