Allegiant Seat Selection Learn how to choose your preferred seat on Allegiant Air with our step-by-step guide. Discover important tips for Allegiant seat selection, including seat types and upgrade options. For assistance, call Allegiant customer service at (860) 934-0441. Make your flight experience more comfortable by selecting the perfect seat today! https://www.airtripgo.com/blog/allegiant-airlines-seat-selection/