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Flight Reliability

G4 1587 · Allegiant Air

This number covered several routes in this period.

One number, several routes.

Airlines reuse flight numbers, and G4 1587 moved between routes during this period. Numbers below combine all of them, so treat them as background, not a verdict. For a cleaner answer, check the route you are actually flying.

Combined across all its routes

71%
Arrive within 15 minutes
27 min
Average arrival delay
0.6%
Cancelled
1 min
Median arrival delay

Based on 158 historical flights. Data through May 2026.

The breakdown

On-time by weekday
  • Mon76%(29 flights)
  • Tue—(4 flights)
  • Wed—(3 flights)
  • Thu68%(38 flights)
  • Fri71%(42 flights)
  • Sat—(2 flights)
  • Sun69%(39 flights)
On-time by departure window
  • 6–9 AM70%(10 flights)
  • 9 AM–12 PM68%(71 flights)
  • 12–3 PM76%(33 flights)
  • 3–6 PM81%(21 flights)
  • 6–9 PM64%(22 flights)
On-time trend by month
83%
May

Jun 60% → May 83% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202560%15
July 202543%14
August 202558%12
November 202575%12
December 202571%14
January 202690%10
February 202675%12
March 202681%16
April 202665%17
May 202683%18
Departures on time
78%
Diverted
0%
Flights flown
157
Months covered
12

Keep nerding

Based on 158 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.