Which airports does Frontier Airlines fly between Denver and Chicago?
For flights between Denver and Chicago, Frontier Airlines operates the following airport routes:
For flights between Denver and Chicago, Frontier Airlines operates from the following airport routes: Denver International (DEN) to O hare International Airport (ORD)
What do Frontier Airlines flights from Denver to Chicago cost?
One of Frontier Airlines cheapest prices for a Denver to Chicago flight we have right now is $24.
On average though, flights with Frontier Airlines cost $122.97 for the route Denver to Chicago, but it mostly depends on the season and how far in advance you book your tickets.