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Flight Reliability

F9 3581 · Frontier Airlines

Santa Ana → San Francisco (SNA–SFO)

37
Bring Snacks
WanderNerd Reliability Score
58%
Arrive within 15 minutes
38 min
Average arrival delay
3.6%
Cancelled
9 min
Median arrival delay

Based on 137 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

F9 3581 departing between 3–6 PM arrived on time 74% of the time, versus 48% between 6–9 PM.

Mondays have been rough.

F9 3581 arrived on time 75% of the time on Sundays and just 39% on Mondays. That gap is worth planning around.

Well behind the SNA–SFO route.

F9 3581 arrived on time 58% of the time, versus 74% across the SNA–SFO route.

Well behind the Frontier Airlines network.

F9 3581 arrived on time 58% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon39%(31 flights)
  • Tue—(0 flights)
  • Wed—(0 flights)
  • Thu60%(30 flights)
  • Fri59%(34 flights)
  • Sat—(5 flights)
  • Sun75%(32 flights)
On-time by departure window
  • 12–3 PM66%(38 flights)
  • 3–6 PM74%(23 flights)
  • 6–9 PM48%(71 flights)
On-time trend by month
65%
May

Jun 67% → May 65% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202567%15
July 202553%17
August 202578%18
December 202550%10
April 202625%16
May 202665%17
Departures on time
61%
Diverted
0%
Flights flown
132
Months covered
11

Same route, other flights

Keep nerding

Based on 137 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.