Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chicago O'Hare Intl Airport to Oshkosh as you normally would.
Due to multiple factors, expect to potentially pay more when booking in October. For low rates, April can be a great choice for travel to Oshkosh. Flights to Oshkosh from Chicago O'Hare Intl Airport in April are about $320 on average during April, but can be found for as low as $240.
|Afternoon Noon to 6 PM||39% of ORD to Oshkosh departures|
|Evening 6 PM to midnight||36% of ORD to Oshkosh departures|
|Morning 6 AM to noon||24% of ORD to Oshkosh departures|
|Early morning Midnight to 6 AM||1% of ORD to Oshkosh departures|