To change your Allegiant flight without a penalty, you’ll need to meet specific conditions. First, check if your ticket is eligible for free changes by reviewing Allegiant’s change policy, as basic fares often have fees. If your ticket qualifies, log in to your Allegiant account, go to “Manage Travel,” and select “Change Flight.” Make your changes within the allowed timeframe, typically 24 hours before departure, and ensure the new flight is within the same fare class or you may incur additional costs. For more personalized assistance or if you’re unsure about fees, contact Allegiant’s customer service directly.