The introduction of UpFront Plus by Frontier Airlines is directly aimed at enhancing passenger experience and potentially increasing revenue through upselling. Given the competitive nature of the airline industry, offering differentiated seating options can attract more customers, especially those seeking comfort and space. The introductory price and the limited booking window could create a sense of urgency, driving early adoption. However, the long-term impact on stock price will depend on customer reception and the overall financial performance of these new offerings.