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Flight Reliability

F9 3699 · Frontier Airlines

Charlotte → Miami (CLT–MIA)

51
A Little Dicey
WanderNerd Reliability Score
73%
Arrive within 15 minutes
32 min
Average arrival delay
4.5%
Cancelled
10 min early
Median arrival delay

Based on 179 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

F9 3699 departing between 9 AM–12 PM arrived on time 91% of the time, versus 50% between 6–9 PM.

Mondays have been rough.

F9 3699 arrived on time 80% of the time on Fridays and just 65% on Mondays. That gap is worth planning around.

A bit behind the CLT–MIA route.

F9 3699 arrived on time 73% of the time, versus 76% across the CLT–MIA route.

Keep a backup plan handy.

F9 3699 was cancelled 4.5% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon65%(31 flights)
  • Tue—(6 flights)
  • Wed—(6 flights)
  • Thu80%(39 flights)
  • Fri80%(46 flights)
  • Sat—(5 flights)
  • Sun68%(38 flights)
On-time by departure window
  • 6–9 AM—(7 flights)
  • 9 AM–12 PM91%(42 flights)
  • 12–3 PM84%(31 flights)
  • 3–6 PM60%(30 flights)
  • 6–9 PM50%(28 flights)
  • 9 PM–12 AM70%(33 flights)
On-time trend by month
42%
May

Jun 92% → May 42% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%12
July 202583%12
August 202585%13
September 202571%17
October 202564%14
November 202587%15
December 202564%14
January 202675%12
February 202685%13
March 202677%13
April 202665%17
May 202642%19
Departures on time
75%
Diverted
0%
Flights flown
171
Months covered
12

Same route, other flights

Keep nerding

Based on 179 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.