Skip to content
WanderNerd
Check a flight

Flight Reliability

F9 4145 · Frontier Airlines

Orlando → Los Angeles (MCO–LAX)

83
Pretty Reliable
WanderNerd Reliability Score
80%
Arrive within 15 minutes
3 min
Average arrival delay
0.4%
Cancelled
5 min early
Median arrival delay

Based on 233 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 4145 departing between 6–9 AM arrived on time 90% of the time, versus 78% between 3–6 PM.

Saturdays have been rough.

F9 4145 arrived on time 89% of the time on Wednesdays and just 72% on Saturdays. That gap is worth planning around.

A bit ahead of the Frontier Airlines network.

F9 4145 arrived on time 80% of the time, versus 73% across the Frontier Airlines network.

Recent months have been rougher.

F9 4145 arrived on time 82% of the time over the last three months in the data, compared with 93% in the three months before that.

The breakdown

On-time by weekday
  • Mon83%(36 flights)
  • Tue85%(27 flights)
  • Wed89%(26 flights)
  • Thu78%(36 flights)
  • Fri78%(37 flights)
  • Sat72%(32 flights)
  • Sun78%(36 flights)
On-time by departure window
  • 6–9 AM90%(50 flights)
  • 9 AM–12 PM—(5 flights)
  • 3–6 PM78%(175 flights)
On-time trend by month
87%
May

Jun 65% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202565%26
July 202577%31
August 202571%31
September 202594%17
October 202588%25
November 202591%11
December 2025100%15
March 202680%25
April 202679%29
May 202687%15
Departures on time
77%
Diverted
0.9%
Flights flown
230
Months covered
11

Same route, other flights

Keep nerding

Based on 233 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.