Booking five months in advance is widely considered the "sweet spot" for securing the best prices on international flights. Historical data suggests that airlines typically release their most competitive fares for long-haul routes between four and six months before departure. If you book much earlier, you might miss out on promotional sales; if you wait until two months before, you risk being hit by the sharp price increases that occur as seats fill up. For peak travel seasons like mid-summer or the December holidays, booking even earlier—around seven to eight months—is advisable. It is also beneficial to book on a Tuesday or Wednesday and set up fare alerts to catch sudden price drops. Since international travel often involves complex logistics and visas, this five-month window provides a safe buffer to plan the rest of your itinerary while the airfare is at its most stable. Avoid booking on weekends when demand-based algorithms often push prices higher for casual shoppers.