How far in advance can you book a flight? The short answer is that it's mostly around 11 months, though a number of factors can influence that. You should keep in mind that advance booking dates can vary depending on a number of factors, such as whether you plan to pay cash or use miles and points to book your ticket.

For most major commercial airlines in 2026, the booking window typically opens 330 to 361 days (approximately 11 to 12 months) in advance. For example, British Airways and United usually release seats 330 days out, while some low-cost carriers like Southwest or easyJet release tickets in "batches" several months at a time rather than on a rolling yearly calendar. While it might be tempting to book as early as possible for a major 2027 trip, travelers should be aware that flight schedules are often "placeholders" that far out and are subject to time changes or equipment swaps. Additionally, the best "value" fares aren't always available on day one; airlines often wait until 4 to 6 months before the flight to release promotional inventory. However, if you are looking to book a "high-demand" award seat using miles or points for Business or First Class, booking the very moment the calendar opens—nearly a year in advance—is the only way to secure the limited inventory before other savvy travelers snap it up.