Frontier Airlines is Certified as a 3-Star Low-Cost Airline for the quality of its airport and onboard product and staff service. Product rating includes cabin comfort, baggage / seat charges, buy onboard food & beverages, cabin cleanliness, and service rating is for cabin and ground staff.

In 2026, Frontier Airlines is generally rated as a 3-Star Low-Cost Carrier by Skytrax and other major aviation review platforms. This rating reflects its "Ultra-Low-Cost" (ULCC) business model, where the base fare is very low, but almost every amenity—including seat selection, carry-on bags, and even water—comes with an additional "High-Fidelity" fee. On the positive side, Frontier is often praised for its "High-Fidelity" environmental efficiency, as it operates one of the youngest and most fuel-efficient fleets in the U.S. (mostly Airbus A320neo and A321neo aircraft). However, customer satisfaction ratings often suffer due to limited seat recline (pre-reclined seats), a lack of in-flight entertainment or Wi-Fi, and a strictly digital customer service model that can be difficult to navigate during flight disruptions. For the 2026 traveler, Frontier is a "High-Fidelity" high-value option for short, point-to-point flights if you can "travel light" and follow their strict baggage rules, but it does not offer the high-fidelity premium experience of full-service legacy carriers.