Frontier Airlines stretch seating comes with an extra five to seven inches of pitch. These seats also recline, unlike the other seats, and they offer bigger tray tables. Frontier typically offers five or six rows of stretch seating on its aircraft, including the exit rows.

Most standard seats on Frontier Airlines do not recline in the traditional sense; instead, they are designed as "pre-reclined" slimline seats. This design is intended to maximize the number of passengers on the aircraft while ensuring that nobody’s personal space is invaded by the person in front of them. However, in 2026, Frontier has introduced a "premium" seating option known as First Seats in the first few rows of their aircraft. While these First Seats offer significantly more legroom and are wider than standard economy seats, they are also officially described as "pre-reclined" to maintain consistency across their fleet's maintenance and weight-saving strategies. This "fixed" position is a core part of the low-cost carrier model, as it reduces the weight of mechanical parts in the seat and eliminates the "recline wars" between passengers. Travelers seeking a traditional deep recline or a lie-flat experience will not find it on Frontier, as the airline prioritizes ultra-low base fares over adjustable cabin hardware.