How To Book a Frontier Airlines Flight Booking a Frontier Airlines flight is straightforward and can be done in just a few simple steps. Firstly, visit the Frontier Airlines website or use their mobile app to begin the booking process. Enter your departure city, destination, travel dates, and the number of passengers. Next, browse through the available flights that match your criteria, paying attention to the fare options and any additional services offered. Once you've selected your preferred flight, proceed to enter passenger details and any extras like seat selection or baggage allowance. Finally, complete the payment process using your preferred method. After confirmation, you'll receive your e-ticket via email, and you're all set to embark on your Frontier Airlines adventure.