The bottom line is this: While last-minute flights are typically more expensive than flights booked in advance with flexible travel dates, there are ways to get lower-cost last-minute flights. 1. Book early and often. Check for neighboring airports, look for one-way flights, and try reserving one ticket at a time in order to save money on last-minute travel arrangements, such as vacations. Our last-minute deals on Flights to Oshawa are amazing, don’t miss it.