Flights New York → Denver — September 14, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Monday, September 14, 2026 on the New York–Denver route: 1 stop itinerary (2 flights) via Atlanta Hartsfield-Jackson (ATL), from Newark Liberty (EWR) to Denver International (DEN), first flight Frontier Airlines F91157, departs 10:29 PM, arrives 8:04 AM the next day, total travel time 11h 35m including layovers, flight time 5h 55m (layovers excluded), $185 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 4, 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: Southwest Airlines WN4240, from New York LaGuardia (LGA) to Denver International (DEN), departs 9:05 PM, arrives 11:20 PM, direct, 4h 15m, $268 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.