Allegiant Air

What the Data Says About Allegiant Air

Across 694,895 flights reported to the Bureau of Transportation Statistics between 2020 and 2025, Allegiant Air (G4) posted a 75.3% on-time rate, with 171,495 delayed departures and 25,650 cancellations. The carrier's average delay when flights run late is 81.5 minutes, and its cancellation rate of 3.69% sits alongside an overall delay rate of 24.7%. Those baseline numbers frame every comparison you can make with other carriers in the BTS dataset.

Digging into causes, Late Aircraft drives the biggest share of minutes lost, with Late Aircraft accounting for 40.2% of delay time and Carrier contributing 31.6%. Weather, often blamed informally, represents 8.8% of total delay minutes, while National Aviation System constraints such as air traffic control and airspace congestion make up 18.9%. Security delays remain the smallest bucket at 0.4%. Taken together, operational and scheduling factors outweigh weather as the dominant driver of Allegiant Air delays.

Seasonality matters too. Recent monthly data shows April 2024 as the best period for Allegiant Air with a 86% on-time rate, while December 2025 was the roughest at 69% on-time, a spread of 17 percentage points between best and worst month. For passengers choosing between carriers, the combination of a 75.3% on-time rate, 81.5-minute average delay, and 3.69% cancellation rate is the clearest summary of what to expect on Allegiant Air flights based on BTS reporting.