August is the cheapest month to fly this route, with average fares around $204 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $248 | $204 | Peak | |
| June 2026 | $210 | $190 | ||
| July 2026 | $219 | $190 | ||
| August 2026 | $204 | $190 | Best |
Departing on Tuesday offers the lowest average fares at $198. Sunday departures are the most expensive at $243, a difference of $45.
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 Salt Lake City to Seattle is August, with average round-trip fares around $204. The lowest fare found in August is $190.
Tuesday departures are the cheapest, averaging $198 round trip. The most expensive day is Sunday at $243.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $248 compared to $204 in the cheapest month. July is a solid middle-ground option at $219.
Flying in August instead of May can save you approximately $44 per round trip. The cheapest month averages $204 while the most expensive averages $248.
Airlines, flight times, price calendar, and more for Salt Lake City to Seattle
View SLC → SEA Details