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Flight Reliability

F9 4954 · Frontier Airlines

Miami → Philadelphia (MIA–PHL)

69
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
15 min
Average arrival delay
2.3%
Cancelled
5 min early
Median arrival delay

Based on 86 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 4954 departing between 9 AM–12 PM arrived on time 100% of the time, versus 54% between 3–6 PM.

Sunday scaries are real for this one.

F9 4954 arrived on time 80% of the time on Mondays and just 56% on Sundays. That gap is worth planning around.

A bit behind the MIA–PHL route.

F9 4954 arrived on time 73% of the time, versus 76% across the MIA–PHL route.

The breakdown

On-time by weekday
  • Mon80%(15 flights)
  • Tue—(1 flights)
  • Wed—(6 flights)
  • Thu69%(16 flights)
  • Fri73%(26 flights)
  • Sat—(4 flights)
  • Sun56%(16 flights)
On-time by departure window
  • 6–9 AM79%(14 flights)
  • 9 AM–12 PM100%(10 flights)
  • 12–3 PM—(9 flights)
  • 3–6 PM54%(28 flights)
  • 6–9 PM60%(10 flights)
  • 9 PM–12 AM77%(13 flights)
On-time trend by month
69%
May

Nov 55% → May 69% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
November 202555%11
March 202683%12
April 202663%16
May 202669%13
Departures on time
70%
Diverted
0%
Flights flown
84
Months covered
11

Same route, other flights

Keep nerding

Based on 86 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.