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Flight Reliability

F9 1440 · Frontier Airlines

Phoenix → Salt Lake City (PHX–SLC)

94
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
4 min early
Average arrival delay
1.1%
Cancelled
14 min early
Median arrival delay

Based on 271 historical flights. Data through May 2026.

What the data says

Morning-you made the right choice.

F9 1440 departing between 9 AM–12 PM arrived on time 93% of the time, versus 86% between 12–3 PM.

Thursdays have been rough.

F9 1440 arrived on time 100% of the time on Wednesdays and just 84% on Thursdays. That gap is worth planning around.

Better than the PHX–SLC route average.

F9 1440 arrived on time 92% of the time, versus 84% across the PHX–SLC route.

Well ahead of the Frontier Airlines network.

F9 1440 arrived on time 92% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon91%(45 flights)
  • Tue97%(39 flights)
  • Wed100%(27 flights)
  • Thu84%(38 flights)
  • Fri91%(46 flights)
  • Sat93%(29 flights)
  • Sun88%(43 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM92%(161 flights)
  • 9 AM–12 PM93%(76 flights)
  • 12–3 PM86%(29 flights)
On-time trend by month
96%
May

Jun 94% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202594%18
July 202579%19
August 202588%25
September 202589%18
October 202596%26
November 2025100%20
December 202589%26
January 202690%19
February 202696%25
March 202694%31
April 202689%18
May 202696%22
Departures on time
92%
Diverted
0.4%
Flights flown
267
Months covered
12

Same route, other flights

Keep nerding

Based on 271 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.