You can definitely change a flight you've already booked on Frontier Airlines. Head to their website and access your reservation under “My Trips.” Depending on your ticket type, you may incur a fee or need to pay a fare difference. If you need help or prefer speaking to a real person, call 1-800-473-6632 and a Frontier support agent will guide you through the process. If you booked a more flexible fare, like with the WORKS package, changes might be free. It's best to make changes at least 24 hours before your flight to avoid issues.
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