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Flight Reliability

F9 4671 · Frontier Airlines

Detroit → Phoenix (DTW–PHX)

85
Pretty Reliable
WanderNerd Reliability Score
82%
Arrive within 15 minutes
6 min
Average arrival delay
0.9%
Cancelled
10 min early
Median arrival delay

Based on 223 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 4671 departing between 12–3 PM arrived on time 86% of the time, versus 73% between 3–6 PM.

Monday is the weak spot.

F9 4671 arrived on time 87% of the time on Saturdays. On Mondays: 76%.

A bit ahead of the DTW–PHX route.

F9 4671 arrived on time 82% of the time, versus 78% across the DTW–PHX route.

Better than the Frontier Airlines network average.

F9 4671 arrived on time 82% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon76%(33 flights)
  • Tue82%(28 flights)
  • Wed76%(29 flights)
  • Thu84%(37 flights)
  • Fri86%(29 flights)
  • Sat87%(30 flights)
  • Sun85%(34 flights)
On-time by departure window
  • 6–9 AM84%(154 flights)
  • 9 AM–12 PM—(6 flights)
  • 12–3 PM86%(22 flights)
  • 3–6 PM73%(11 flights)
  • 6–9 PM78%(27 flights)
On-time trend by month
81%
May

Jun 92% → May 81% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202592%25
July 202587%30
August 202577%22
November 202591%11
December 202573%11
January 202662%21
February 202673%11
March 202688%24
April 202690%30
May 202681%31
Departures on time
81%
Diverted
0.4%
Flights flown
220
Months covered
12

Same route, other flights

Keep nerding

Based on 223 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.