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Flight Reliability

F9 4239 · Frontier Airlines

Cincinnati → Phoenix (CVG–PHX)

92
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
6 min early
Average arrival delay
1.4%
Cancelled
11 min early
Median arrival delay

Based on 140 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

F9 4239 departing between 3–6 PM arrived on time 96% of the time, versus 83% between 6–9 PM.

Friday comes out ahead.

A small edge: 92% on time on Fridays against 87% on Thursdays.

Better than the CVG–PHX route average.

F9 4239 arrived on time 90% of the time, versus 82% across the CVG–PHX route.

Well ahead of the Frontier Airlines network.

F9 4239 arrived on time 90% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon89%(28 flights)
  • Tue—(6 flights)
  • Wed—(4 flights)
  • Thu87%(30 flights)
  • Fri92%(24 flights)
  • Sat—(7 flights)
  • Sun90%(39 flights)
On-time by departure window
  • 6–9 AM89%(88 flights)
  • 9 AM–12 PM—(2 flights)
  • 12–3 PM92%(13 flights)
  • 3–6 PM96%(23 flights)
  • 6–9 PM83%(12 flights)
On-time trend by month
92%
Mar

Jun 100% → Mar 92% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%14
July 2025100%12
August 2025100%12
October 202569%16
November 202587%15
December 202570%10
January 202690%10
March 202692%26
Departures on time
91%
Diverted
0%
Flights flown
138
Months covered
12

Same route, other flights

Keep nerding

Based on 140 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.