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Flight Reliability

F9 4556 · Frontier Airlines

Atlanta → Orlando (ATL–MCO)

82
Pretty Reliable
WanderNerd Reliability Score
79%
Arrive within 15 minutes
11 min
Average arrival delay
1.2%
Cancelled
6 min early
Median arrival delay

Based on 328 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 4556 departing between 12–3 PM arrived on time 91% of the time, versus 77% between 6–9 AM.

Saturdays have been rough.

F9 4556 arrived on time 90% of the time on Wednesdays and just 72% on Saturdays. That gap is worth planning around.

Better than the ATL–MCO route average.

F9 4556 arrived on time 79% of the time, versus 70% across the ATL–MCO route.

A bit ahead of the Frontier Airlines network.

F9 4556 arrived on time 79% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon75%(47 flights)
  • Tue77%(44 flights)
  • Wed90%(48 flights)
  • Thu89%(45 flights)
  • Fri77%(48 flights)
  • Sat72%(46 flights)
  • Sun74%(46 flights)
On-time by departure window
  • 6–9 AM77%(278 flights)
  • 9 AM–12 PM90%(19 flights)
  • 12–3 PM91%(23 flights)
  • 3–6 PM—(4 flights)
On-time trend by month
75%
Apr

Jun 63% → Apr 75% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202563%27
July 202572%29
August 202583%29
September 202579%29
October 202581%31
November 202580%30
December 202567%30
January 202693%29
February 202693%28
March 202680%30
April 202675%28
Departures on time
75%
Diverted
0%
Flights flown
324
Months covered
12

Same route, other flights

Keep nerding

Based on 328 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.