The number of days before a ticket can be booked with Frontier Airlines may vary depending on the specific flight and fare type. Here are some general steps to keep in mind: • Frontier Airlines typically allows passengers to book tickets up to 11 months in advance. • Check the Frontier Airlines website or contact their customer service to confirm the booking window for your desired flight. • Consider booking as early as possible to secure better fares and availability. If you still have specific questions regarding Frontier Airlines flight booking, approach Frontier Airlines supervisor for instant guidance and support.