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Book Airfare Early
The general rule of thumb for booking airfare is two months in advance for domestic flights and three months in advance for international; however, for peak-season flyers, sticking closer to that 90-day mark may be best. For summer flights, experts say that early spring is prime time for researching and booking. During this period, airlines will be offering sales on summer routes and ticket prices will generally be at their lowest. Waiting too long to book your flight will mean paying a premium (at best) or finding no flights at all (at worst). So if you see an unusually low fare, grab it immediately; flight prices can change quickly, without warning.