Frontier Airlines More than 21 percent of the airline's flights were delayed or canceled. Conversely, just under 79 percent (78.76) of Frontier's flights were on time.

Frontier Airlines, like many Ultra-Low-Cost Carriers (ULCCs), has a reputation for volatility in its on-time performance, but the data is more nuanced. According to 2024 and 2025 DOT reports, Frontier often ranks in the lower-middle tier for on-time arrivals compared to legacy carriers like Delta or United. The "problem" with Frontier isn't necessarily that they are late more often than others, but rather the impact of a delay. Because Frontier operates a "point-to-point" system with fewer daily frequencies on many routes, if your flight is cancelled or significantly delayed, there may not be another flight for 24 to 48 hours. This "lack of recovery options" makes a Frontier delay feel much worse than a delay on a major hub-and-spoke airline. To minimize risk, travelers are advised to book the first flight of the day, as delays tend to "cascade" throughout the afternoon and evening as crews and planes move through the system.