How do I check in for Frontier Airlines?

To check in for your Frontier Airlines flight, go to Frontier's website or mobile app. Log in to your account and select your reservation. Choose the option to Frontier Check In online. You can print your boarding pass or have it on your phone. Be sure to check in at least 24 hours before your flight for the lowest fees. Check your bags at the airport when you arrive. If you need to more detail you can call to helpline at 1 (855) 981-4544 or 1 (844) 902-4930 (OTA-Skip Waiting). Or visit the Airlinespetpolicy site.