When should passengers arrive at the airport for their Frontier Airlines flight?

Passengers should arrive at the airport well in advance of their flight to ensure a smooth travel experience. For domestic flights, arriving at least one hour before departure allows adequate time for check-in, security screening, and reaching the gate. For international flights, the recommendation to arrive at least two hours before departure is based on the additional time needed for customs and immigration, as well as potentially longer lines at check-in and security. Therefore, both statements regarding arrival times for domestic and international flights are correct, reinforcing the importance of giving oneself enough time to navigate airport processes without the stress of rushing.