August is the cheapest month to fly this route, with average fares around $176 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $180 | $77 | ||
| June 2026 | $184 | $128 | Peak | |
| July 2026 | $182 | $168 | ||
| August 2026 | $176 | $168 | Best |
Departing on Wednesday offers the lowest average fares at $170. Sunday departures are the most expensive at $201, a difference of $31.
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 Los Angeles to Seattle is August, with average round-trip fares around $176. The lowest fare found in August is $168.
Wednesday departures are the cheapest, averaging $170 round trip. The most expensive day is Sunday at $201.
Based on current pricing trends, booking for August travel offers the best value. Avoid June if possible, as fares average $184 compared to $176 in the cheapest month. July is a solid middle-ground option at $182.
Flying in August instead of June can save you approximately $8 per round trip. The cheapest month averages $176 while the most expensive averages $184.
Airlines, flight times, price calendar, and more for Los Angeles to Seattle
View LAX → SEA Details