Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Launceston to Chicago O'Hare Intl Airport as you normally would.
Launceston (LST) is the airport you will fly out of if you book a flight from Launceston to Chicago O'Hare Intl. You should not have trouble finding flights to Chicago O'Hare Intl from Launceston; the airport handles an average of 0 outbound flights to Chicago O'Hare Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Launceston airport to Chicago O'Hare Intl. It is only a 13.2 km journey to Launceston (LST) from Launceston’s city centre.