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Flight Reliability

F9 4812 · Frontier Airlines

Orlando → Washington (MCO–IAD)

78
Usually Fine
WanderNerd Reliability Score
81%
Arrive within 15 minutes
4 min
Average arrival delay
2.9%
Cancelled
15 min early
Median arrival delay

Based on 205 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

F9 4812 departing between 3–6 AM arrived on time 100% of the time, versus 58% between 6–9 PM.

Sunday scaries are real for this one.

F9 4812 arrived on time 89% of the time on Saturdays and just 67% on Sundays. That gap is worth planning around.

Better than the Frontier Airlines network average.

F9 4812 arrived on time 81% of the time, versus 73% across the Frontier Airlines network.

Trending in the right direction.

F9 4812 arrived on time 96% of the time over the last three months in the data, compared with 84% in the three months before that.

The breakdown

On-time by weekday
  • Mon85%(41 flights)
  • Tue—(3 flights)
  • Wed—(3 flights)
  • Thu81%(32 flights)
  • Fri85%(41 flights)
  • Sat89%(36 flights)
  • Sun67%(43 flights)
On-time by departure window
  • 3–6 AM100%(47 flights)
  • 6–9 AM96%(24 flights)
  • 9 AM–12 PM73%(45 flights)
  • 12–3 PM—(1 flights)
  • 3–6 PM78%(51 flights)
  • 6–9 PM58%(31 flights)
On-time trend by month
94%
Apr

Jun 53% → Apr 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%15
July 202568%19
August 202564%22
September 202586%21
October 202577%22
November 202596%23
December 202567%12
January 202690%10
February 202693%15
March 2026100%21
April 202694%16
Departures on time
86%
Diverted
0%
Flights flown
199
Months covered
12

Same route, other flights

Keep nerding

Based on 205 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.