You can modify your last name for legal reasons and correct minor typos up to four letters in spelling under Allegiant Air change name on ticket policy. But, if you want to alter your legal name due to a marriage or divorce, you'll need to provide official paperwork to support the change, such as a divorce or marriage agreement. Recall that changing your name requires paying the airline's name change cost. Contact Allegiant Airlines customer service or go to the airline's website to learn more about the policies and procedures around name changes. Additionally, you may reach a flight expert at +1-800-865-1848 to discuss your issues and receive prompt answers.
visit at: https://www.flyingrules.com/name-change/allegiant-air-name-change-policy