Flights Denver → Los Angeles — September 21, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Monday, September 21, 2026 on the Denver–Los Angeles route: 1 stop itinerary (2 flights) via San Francisco International (SFO), from Denver International (DEN) to Los Angeles International (LAX), first flight Frontier Airlines F91229, departs 8:59 AM, arrives 1:43 PM, total travel time 5h 44m including layovers, flight time 4h 24m (layovers excluded), $136 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 8, 2026 and read by AirSource on September 10, 2026, 21:21 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: Frontier Airlines F92797, from Denver International (DEN) to Los Angeles International (LAX), departs 9:05 AM, arrives 10:39 AM, direct, 2h 34m, $164 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.