How to Select Seats ????-????????????-????????????-???????????????? On Allegiant Airlines? Discover the best ways to select seats on Allegiant Airlines hassle-free. Learn the step-by-step process, insider tips, and FAQs for a smooth seating experience. Selecting seats on Allegiant Airlines can be a breeze if you know the right steps and tips. In this comprehensive guide, we'll walk you through everything you need to know to ensure a comfortable and convenient seating arrangement for your next Allegiant flight. From understanding the booking process to choosing the perfect seat, we've got you covered.