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Flight Reliability

F9 1577 · Frontier Airlines

Philadelphia → Fort Myers (PHL–RSW)

72
Usually Fine
WanderNerd Reliability Score
76%
Arrive within 15 minutes
8 min
Average arrival delay
3.1%
Cancelled
9 min early
Median arrival delay

Based on 196 historical flights. Data through May 2026.

What the data says

The 3–6 AM departure wins.

F9 1577 departing between 3–6 AM arrived on time 90% of the time, versus 72% between 9 AM–12 PM.

Saturdays have been rough.

F9 1577 arrived on time 87% of the time on Tuesdays and just 62% on Saturdays. That gap is worth planning around.

A bit ahead of the PHL–RSW route.

F9 1577 arrived on time 76% of the time, versus 73% across the PHL–RSW route.

A bit ahead of the Frontier Airlines network.

F9 1577 arrived on time 76% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon77%(31 flights)
  • Tue87%(23 flights)
  • Wed—(7 flights)
  • Thu77%(31 flights)
  • Fri82%(33 flights)
  • Sat62%(29 flights)
  • Sun75%(36 flights)
On-time by departure window
  • 3–6 AM90%(10 flights)
  • 6–9 AM73%(120 flights)
  • 9 AM–12 PM72%(18 flights)
  • 12–3 PM—(6 flights)
  • 3–6 PM88%(32 flights)
  • 6–9 PM—(4 flights)
On-time trend by month
100%
May

Sep 94% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
September 202594%17
October 202591%21
November 202581%21
December 202554%24
January 202667%15
March 202648%27
April 202678%23
May 2026100%15
Departures on time
83%
Diverted
0%
Flights flown
190
Months covered
12

Same route, other flights

Keep nerding

Based on 196 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.