Because commercial facilities require reservations, pet owners are urged to make boarding reservations several months in advance of their vacation. (carrollcountytimes.com)
Available flights are very limited and must be booked several months in advance which has put me in a position of having to purchase flights outright. (creditwalk.ca)
Since we see very high demand throughout the year we do encourage making reservations several months in advance. (kira-mar.com.gw1.us)