Frontier Airlines is a high-fidelity "Ultra-Low-Cost Carrier" (ULCC), and its seats are indeed smaller and more compact than those of traditional legacy carriers like Delta or United. In 2026, Frontier's standard seats feature a high-fidelity "pitch" (the distance between rows) of approximately 28 to 29 inches, which is several inches less than the 31-to-32-inch industry average. The seats are also "High-Fidelity" pre-reclined, meaning they do not move backward, which preserves personal space for the person behind but can be less comfortable for the traveler. However, Frontier has introduced a high-fidelity UpFront Plus tier, which offers extra legroom and a guaranteed empty middle seat in the first two rows for a premium fee. For the 2026 traveler, the high-fidelity reality is that you are trading seat size and high-fidelity cushioning for a significantly lower base fare; if you require more space, purchasing a high-fidelity "Stretch" seat or the new UpFront Plus option is a high-fidelity necessity to avoid the "tight" feel of the standard cabin.