Frontier Check In allows passengers to complete their check in process from their home up to 24 hours before their scheduled flight. Passengers can select seats, review and print their boarding passes, and check bags from any device. The contactless check in process saves time and reduces lines at the airport. If you have questions or need assistance related to Frontier Check In, you can visit Airlines Pet Policy. Additionally, talk to a representative contact at 1-801-401-9000 or +1-844-902-4930 (OTA).