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Flight Reliability

F9 1850 · Frontier Airlines

San Francisco → Las Vegas (SFO–LAS)

59
A Little Dicey
WanderNerd Reliability Score
68%
Arrive within 15 minutes
24 min
Average arrival delay
2.4%
Cancelled
1 min early
Median arrival delay

Based on 165 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 1850 departing between 6–9 AM arrived on time 88% of the time, versus 53% between 6–9 PM.

Friday is doing you no favors.

F9 1850 arrived on time 83% of the time on Wednesdays and just 56% on Fridays. That gap is worth planning around.

Lagging the SFO–LAS route.

F9 1850 arrived on time 68% of the time, versus 76% across the SFO–LAS route.

A bit behind the Frontier Airlines network.

F9 1850 arrived on time 68% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon67%(24 flights)
  • Tue—(9 flights)
  • Wed83%(12 flights)
  • Thu61%(36 flights)
  • Fri56%(27 flights)
  • Sat72%(18 flights)
  • Sun71%(35 flights)
On-time by departure window
  • 6–9 AM88%(50 flights)
  • 9 AM–12 PM—(5 flights)
  • 12–3 PM56%(36 flights)
  • 3–6 PM61%(38 flights)
  • 6–9 PM53%(32 flights)
On-time trend by month
71%
May

Jun 30% → May 71% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202530%10
August 202558%12
November 202577%22
December 202590%30
April 202656%27
May 202671%21
Departures on time
68%
Diverted
0%
Flights flown
161
Months covered
12

Same route, other flights

Keep nerding

Based on 165 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.