Yes, you can cancel your Allegiant flight at 𝟏-𝟖𝟑𝟑-𝟕𝟖𝟏-𝟖𝟕𝟓𝟎 without a penalty if you do so within 24 hours of booking, provided the flight is at least seven days away. After this period, cancellations generally incur a fee, and any remaining balance is typically issued as a travel credit