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 | $225 | $188 | Peak | |
| June 2026 | $199 | $188 | ||
| July 2026 | $199 | $188 | ||
| August 2026 | $192 | $188 | Best |
Departing on Wednesday offers the lowest average fares at $188. Sunday departures are the most expensive at $222, a difference of $34.
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 Denver to San Francisco 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 Sunday at $222.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $225 compared to $192 in the cheapest month. July is a solid middle-ground option at $199.
Flying in August instead of May can save you approximately $33 per round trip. The cheapest month averages $192 while the most expensive averages $225.
Airlines, flight times, price calendar, and more for Denver to San Francisco
View DEN → SFO Details