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Flight Reliability

F9 1681 · Frontier Airlines

ISP → Myrtle Beach (ISP–MYR)

88
Pretty Reliable
WanderNerd Reliability Score
86%
Arrive within 15 minutes
1 min
Average arrival delay
0.8%
Cancelled
16 min early
Median arrival delay

Based on 123 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

F9 1681 departing between 3–6 PM arrived on time 100% of the time, versus 81% between 6–9 AM.

Saturdays have been rough.

F9 1681 arrived on time 96% of the time on Mondays and just 74% on Saturdays. That gap is worth planning around.

Better than the Frontier Airlines network average.

F9 1681 arrived on time 86% of the time, versus 73% across the Frontier Airlines network.

Slipping a little lately.

F9 1681 arrived on time 85% of the time over the last three months in the data, compared with 90% in the three months before that.

The breakdown

On-time by weekday
  • Mon96%(28 flights)
  • Tue—(4 flights)
  • Wed83%(18 flights)
  • Thu—(8 flights)
  • Fri82%(27 flights)
  • Sat74%(27 flights)
  • Sun—(9 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM81%(52 flights)
  • 9 AM–12 PM87%(55 flights)
  • 3–6 PM100%(13 flights)
On-time trend by month
100%
May

Jun 71% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202571%17
July 202588%16
August 202581%16
September 2025100%13
October 202588%17
November 202573%11
April 202683%12
May 2026100%19
Departures on time
84%
Diverted
0.8%
Flights flown
121
Months covered
8

Keep nerding

Based on 123 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.