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Flight Reliability

F9 4439 · Frontier Airlines

Philadelphia → Fort Lauderdale (PHL–FLL)

66
Usually Fine
WanderNerd Reliability Score
69%
Arrive within 15 minutes
19 min
Average arrival delay
1.8%
Cancelled
3 min early
Median arrival delay

Based on 112 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 4439 departing between 3–6 AM arrived on time 91% of the time, versus 58% between 3–6 PM.

Sunday scaries are real for this one.

F9 4439 arrived on time 80% of the time on Tuesdays and just 50% on Sundays. That gap is worth planning around.

A bit behind the PHL–FLL route.

F9 4439 arrived on time 69% of the time, versus 73% across the PHL–FLL route.

A bit behind the Frontier Airlines network.

F9 4439 arrived on time 69% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon69%(16 flights)
  • Tue80%(15 flights)
  • Wed80%(15 flights)
  • Thu77%(17 flights)
  • Fri71%(17 flights)
  • Sat57%(14 flights)
  • Sun50%(16 flights)
On-time by departure window
  • 3–6 AM91%(21 flights)
  • 6–9 AM73%(15 flights)
  • 9 AM–12 PM73%(11 flights)
  • 12–3 PM—(6 flights)
  • 3–6 PM58%(57 flights)
On-time trend by month
50%
Apr

Dec 73% → Apr 50% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
December 202573%15
January 202655%11
February 202678%23
March 202687%31
April 202650%26
Departures on time
75%
Diverted
0%
Flights flown
110
Months covered
6

Same route, other flights

Keep nerding

Based on 112 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.