To change an Allegiant Air flight, you can call +++ рќџ­рќџґрќџґрќџґ||267[рќџЎрќџќрќџќрќџ™]>>. Allegiant typically charges a $25 change fee per passenger, per segment, unless you purchase their Trip Flex add-on. With Trip Flex, you can modify your itinerary without this...