You must try and plan in your trip advance to get cheap flight tickets. Flight tickets usually don't get cheaper closer to the departure date. Flights tend to be the most inexpensive when you book between four months and three weeks before your departure date. Seasonal changes and holidays can also affect pricing at different times. So, this must be kept in mind before looking out for cheap air tickets. However considering there may be times when you need to look out for cheap flights online, you can simply download our InterMiles app to make the most of the promos, prices and flight booking on the go.