Skip to content
WanderNerd
Check a flight

Flight Reliability

F9 2523 · Frontier Airlines

Salt Lake City → Phoenix (SLC–PHX)

86
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
8 min
Average arrival delay
0%
Cancelled
13 min early
Median arrival delay

Based on 170 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 2523 departing between 9 AM–12 PM arrived on time 86% of the time, versus 59% between 9 PM–12 AM.

Wednesdays have been rough.

F9 2523 arrived on time 85% of the time on Tuesdays and just 65% on Wednesdays. That gap is worth planning around.

A bit behind the SLC–PHX route.

F9 2523 arrived on time 78% of the time, versus 85% across the SLC–PHX route.

A bit ahead of the Frontier Airlines network.

F9 2523 arrived on time 78% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon83%(24 flights)
  • Tue85%(20 flights)
  • Wed65%(17 flights)
  • Thu82%(27 flights)
  • Fri70%(27 flights)
  • Sat84%(25 flights)
  • Sun77%(30 flights)
On-time by departure window
  • 6–9 AM—(1 flights)
  • 9 AM–12 PM86%(42 flights)
  • 12–3 PM77%(65 flights)
  • 3–6 PM83%(36 flights)
  • 6–9 PM—(9 flights)
  • 9 PM–12 AM59%(17 flights)
On-time trend by month
58%
May

Oct 73% → May 58% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
October 202573%11
November 202553%17
December 202587%15
January 202690%19
February 202692%26
March 202687%31
April 202674%19
May 202658%19
Departures on time
81%
Diverted
0%
Flights flown
170
Months covered
10

Same route, other flights

Keep nerding

Based on 170 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.