Flights Denver → Chicago — September 18, 2026

One way · Economy · 1 adult · price per person

The cheapest itinerary observed for Friday, September 18, 2026 on the Denver–Chicago route: 1 stop itinerary (2 flights) via Dallas/Fort Worth (DFW), from Denver International (DEN) to Chicago O'Hare (ORD), first flight Frontier Airlines F94464, departs 4:11 PM, arrives 12:45 AM the next day, total travel time 7h 34m including layovers, flight time 4h 42m (layovers excluded), $146 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, 20:47 UTC: it is not guaranteed and is confirmed on Aviasales at booking time. The cheapest direct flight observed: Frontier Airlines F93174, from Denver International (DEN) to Chicago O'Hare (ORD), departs 8:55 PM, arrives 12:23 AM the next day, direct, 2h 28m, $169 per person. Fare as listed by Aviasales: carry-on bag not included (personal item only), checked bag not included, changes not allowed, non-refundable.