It is critical to respond quickly when dealing with an Allegiant missed flight. Please alert Allegiant Air of the situation as soon as possible. Options may differ depending on the type of fare and the conditions. Allegiant Missed flights usually result in a ticket value forfeiture, however by contacting Allegiant's customer service, you can discuss potential solutions or rebooking options. To minimize delays to your travel arrangements, keep in mind that timely contact is essential when dealing with an Allegiant missed flight. For more information, please see the attached link to the blog post by Airlines Pet Policy.