Users have found that booking a flight from Illinois to Montana at least 49 days early can save you up to 26% on average compared to booking a flight this week. If booking 49 days before your flight isn’t an option for you, users have found flights from Illinois to Montana for as little as $470 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $513 for flights departing within the next 3 days.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Montana as you normally would.
Flights from Illinois to Montana lean towards being more expensive in December. Prices are generally better when you fly from Illinois to Montana in August, with the cheapest ticket starting at $143.
||$110||$232||No cancel fee||62%|
||$149||$359||No cancel fee||75%|
||$149||$443||No cancel fee||69%|
||$152||$480||No cancel fee||N/A|
||$185||$468||No cancel fee||71%|