US airlines typically open their booking window around 330 days in advance, but the early bird in this case doesn't usually get the worm. Booking a ticket too early in that window can be an expensive mistake—second only in cost to booking at the last minute.

Most major commercial airlines typically release their flight schedules and open seats for booking approximately 330 to 362 days (roughly 11 to 12 months) in advance. For example, legacy carriers like United, Delta, and British Airways often follow a 330-day window. However, the exact timing varies by airline; Southwest Airlines is a notable exception, as they release their schedule in "blocks" only about 6 to 8 months in advance. Booking as soon as the window opens is often a strategy used by travelers looking to use frequent flyer miles for high-demand routes, as "award seat" availability is usually highest at the moment of release. For cash fares, while you can see the schedule a year out, the "sweet spot" for the lowest prices is generally much closer to the departure date—typically 1 to 3 months for domestic and 2 to 8 months for international travel. In 2026, real-time data tracking in apps has made it easier to monitor these release dates, but the 11-month rule remains the industry standard for most global carriers.