August is the cheapest month to fly this route, with average fares around $192 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $214 | $188 | Peak | |
| June 2026 | $200 | $188 | ||
| July 2026 | $198 | $188 | ||
| August 2026 | $192 | $188 | Best |
Departing on Wednesday offers the lowest average fares at $188. Friday departures are the most expensive at $218, a difference of $30.
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 San Francisco to Denver is August, with average round-trip fares around $192. The lowest fare found in August is $188.
Wednesday departures are the cheapest, averaging $188 round trip. The most expensive day is Friday at $218.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $214 compared to $192 in the cheapest month. June is a solid middle-ground option at $200.
Flying in August instead of May can save you approximately $22 per round trip. The cheapest month averages $192 while the most expensive averages $214.
Airlines, flight times, price calendar, and more for San Francisco to Denver
View SFO → DEN Details