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Flight Reliability

F9 4401 · Frontier Airlines

Las Vegas → San Francisco (LAS–SFO)

46
Bring Snacks
WanderNerd Reliability Score
54%
Arrive within 15 minutes
27 min
Average arrival delay
1.8%
Cancelled
10 min
Median arrival delay

Based on 330 historical flights. Data through May 2026.

What the data says

The 3–6 PM departure wins.

F9 4401 departing between 3–6 PM arrived on time 75% of the time, versus 11% between 6–9 AM.

Friday is doing you no favors.

F9 4401 arrived on time 79% of the time on Saturdays and just 41% on Fridays. That gap is worth planning around.

Lagging the LAS–SFO route.

F9 4401 arrived on time 54% of the time, versus 67% across the LAS–SFO route.

Well behind the Frontier Airlines network.

F9 4401 arrived on time 54% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon51%(51 flights)
  • Tue55%(40 flights)
  • Wed55%(44 flights)
  • Thu50%(48 flights)
  • Fri41%(51 flights)
  • Sat79%(43 flights)
  • Sun49%(47 flights)
On-time by departure window
  • 6–9 AM11%(18 flights)
  • 9 AM–12 PM58%(24 flights)
  • 12–3 PM47%(17 flights)
  • 3–6 PM75%(40 flights)
  • 6–9 PM53%(225 flights)
On-time trend by month
23%
May

Jun 53% → May 23% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202553%30
July 202543%30
August 202565%31
September 202550%30
October 202565%31
November 202530%30
December 202541%22
January 202691%21
February 202664%25
March 202688%16
April 202659%27
May 202623%31
Departures on time
62%
Diverted
0%
Flights flown
324
Months covered
12

Same route, other flights

Keep nerding

Based on 330 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.