Flights San Francisco → Denver — September 24, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Thursday, September 24, 2026 on the San Francisco–Denver route: 1 stop itinerary (2 flights) via Los Angeles International (LAX), from San Francisco International (SFO) to Denver International (DEN), first flight Frontier Airlines F92858, departs 12:07 PM, arrives 5:59 PM, total travel time 4h 52m including layovers, flight time 4h 7m (layovers excluded), $135 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable. Price found in an Aviasales search on September 6, 2026 and read by AirSource on September 10, 2026, 20:48 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: Frontier Airlines F91230, from San Francisco International (SFO) to Denver International (DEN), departs 6:04 AM, arrives 9:46 AM, direct, 2h 42m, $165 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.