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Flight Reliability

F9 1191 · Frontier Airlines

Phoenix → San Francisco (PHX–SFO)

66
Usually Fine
WanderNerd Reliability Score
67%
Arrive within 15 minutes
10 min
Average arrival delay
2.2%
Cancelled
5 min early
Median arrival delay

Based on 178 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

F9 1191 departing between 3–6 PM arrived on time 77% of the time, versus 37% between 12–3 PM.

Sunday scaries are real for this one.

F9 1191 arrived on time 75% of the time on Saturdays. On Sundays: 61%.

A bit behind the PHX–SFO route.

F9 1191 arrived on time 67% of the time, versus 72% across the PHX–SFO route.

A bit behind the Frontier Airlines network.

F9 1191 arrived on time 67% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon74%(39 flights)
  • Tue—(3 flights)
  • Wed—(1 flights)
  • Thu68%(34 flights)
  • Fri63%(38 flights)
  • Sat75%(16 flights)
  • Sun61%(43 flights)
On-time by departure window
  • 6–9 AM74%(87 flights)
  • 9 AM–12 PM—(3 flights)
  • 12–3 PM37%(27 flights)
  • 3–6 PM77%(51 flights)
  • 6–9 PM—(6 flights)
On-time trend by month
39%
May

Jun 95% → May 39% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202595%19
July 202543%21
August 202575%20
September 202556%16
December 202573%11
January 202687%15
February 202681%16
March 202693%14
April 202647%15
May 202639%23
Departures on time
67%
Diverted
0%
Flights flown
174
Months covered
11

Same route, other flights

Keep nerding

Based on 178 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.