((TIME TO CHECK-IN)) For most flights, you can check in on the Frontier app starting 24 hours before your flight's scheduled departure time. You must have your boarding pass and have any bags checked in by the below cutoff times before departure: 60 minutes (domestic flights) 60 minutes (international flights) When traveling with Frontier Airlines, it is recommended that you check in as early as possible to ensure a smooth experience. Frontier’s online check-in opens 24 hours before your flight’s scheduled departure time and remains available until 60 minutes before takeoff. Passengers are encouraged to use the online check-in or the Frontier mobile app to save time and potentially avoid long lines at the airport. If you need to check baggage, it’s important to arrive at the airport at least two hours before departure, as bag drop and airport check-in counters close 60 minutes before the flight. Frontier also advises passengers to be at the gate at least 45 minutes prior to departure since boarding closes 20 minutes before the flight leaves. If you miss these timeframes, you may be marked as a no-show, and your ticket could be forfeited without a refund. For those checking in at the airport, note that additional fees may apply, and the counters generally open two hours before the scheduled flight. To avoid unexpected delays or issues, it’s best to check in online as soon as the 24-hour window opens and plan to be at the airport well ahead of time.[1_86 65 51 11 86