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Flight Reliability

F9 1571 · Frontier Airlines

Phoenix → San Diego (PHX–SAN)

90
Nerd Approved
WanderNerd Reliability Score
84%
Arrive within 15 minutes
0 min
Average arrival delay
0.4%
Cancelled
10 min early
Median arrival delay

Based on 241 historical flights. Data through May 2026.

What the data says

The 6–9 AM departure wins.

F9 1571 departing between 6–9 AM arrived on time 90% of the time, versus 63% between 9 AM–12 PM.

Friday is doing you no favors.

F9 1571 arrived on time 97% of the time on Saturdays and just 71% on Fridays. That gap is worth planning around.

Better than the PHX–SAN route average.

F9 1571 arrived on time 84% of the time, versus 75% across the PHX–SAN route.

Better than the Frontier Airlines network average.

F9 1571 arrived on time 84% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon91%(35 flights)
  • Tue87%(23 flights)
  • Wed88%(33 flights)
  • Thu74%(38 flights)
  • Fri71%(44 flights)
  • Sat97%(30 flights)
  • Sun87%(37 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM90%(105 flights)
  • 9 AM–12 PM63%(49 flights)
  • 12–3 PM87%(76 flights)
  • 3–6 PM—(6 flights)
  • 6–9 PM—(3 flights)
On-time trend by month
68%
May

Jun 100% → May 68% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 2025100%14
July 202591%22
August 202591%22
September 202593%14
October 202592%25
November 202577%17
December 202573%22
January 202675%24
March 202681%21
April 202687%23
May 202668%28
Departures on time
87%
Diverted
0%
Flights flown
240
Months covered
12

Same route, other flights

Keep nerding

Based on 241 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.