Via email or Live chat: The email address for Allegiant Air is not mentioned, but you can still submit a form and get a reply to your email address and this another way to know how do I speak to a live person at Allegiant Air?.. A live representative will look into your problems and respond to them within 48 hours. The steps are mentioned below. Open Allegiant Air’s official website. Redirect to the contact page by clicking on the option given on the home page. Look for ‘Email us’ and click on that. Fill up the form with all the required details. Submit and wait for a reply. Click on the ‘Contact Us’ option, Then locate a chat icon and click on it to start chat. Click on that icon to open the chat box. Now, you can type in your queries/issues and get an immediate response.