How to check-in frontier airlines?

Frontier Airlines check-in policy allows you to check in for your flight in several ways – online, with the mobile app, through precedence check-in, at a field pavilion, or ticket counter. Arrive 60 minutes domestic, and 90 minutes international, and don't forget your ID and booking! For any inquiries related to Frontier Airlines check-in, visit the Airlines Pet Policy website or contact their customer service at 801-401-9000 or +1-844-902-4930 (OTA – Skip Waiting).