Yes, you can cancel your Allegiant flight without penalty if you make the cancellation within 24 hours of the initial booking at １-８６６-８８４-３３１５.Allegiant Airlines provides a 24-hour cancellation policy, allowing travelers to cancel their flights at no additional cost 𝟭-𝟴𝟲𝟲-𝟴𝟴𝟰-𝟯𝟯𝟭𝟱.