How Do I Add a Seat on Frontier? Frontier Airlines allows you to add a seat during booking, after booking, or at the time of check-in. You can do so through the Frontier Airlines website. The detailed steps to pick a seat after flight ticket reservations are as follows. ● Visit the Frontier Airlines website. ● Go to the “Manage Booking” section. ● Enter the login credentials, such as booking reference and last name. ● Select a flight that requires seat selection. ● Tap on the “Add Seat” option. ● A seat map will appear on the screen. ● Choose a desired seat from the map. ● Make the payment, if applicable. ● Get the confirmation on your registered email. Do I have to purchase a seat assignment on Frontier Airlines? No. You do not mandatorily need to buy a seat assignment on Frontier. However, if you do not pick a seat in advance, the airline will assign you a random seat during check-in for free. Especially when you have a Basic Economy fare, the airline allows seat selection only for a fee. Therefore, the only way to get it for free is to skip the seat selection process. Conclusion Frontier Airlines provides different seating options to match the various needs of its passengers. Therefore, you can choose a desired seat either during booking, after booking or during check-in. The airline may or may not ask for a fee based on various factors mentioned above. You can avoid the charges if you let the airline randomly assign you a seat during check-in. Further, follow the above process to easily pick a seat and enjoy a comfortable journey. Still, if any doubt persists, directly contact +1-802-231-1806 for more information.