If you’re wondering where do Frontier fly to, the airline serves an extensive network of destinations across the United States and select international locations. Frontier Airlines flies to major U.S. cities such as Denver, Orlando, Las Vegas, Phoenix, Dallas, Chicago, Atlanta, and Miami, along with many regional and leisure-focused airports. Internationally, when looking at where do Frontier fly to, the airline offers routes to Mexico, the Caribbean, and Central America, including popular destinations like Cancun, Punta Cana, Montego Bay, San Juan, and San José, Costa Rica. With a focus on affordable travel, Frontier continues to expand where do Frontier fly to with seasonal and nonstop route options.