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Flight Reliability

F9 4758 · Frontier Airlines

Ontario → Las Vegas (ONT–LAS)

54
A Little Dicey
WanderNerd Reliability Score
63%
Arrive within 15 minutes
25 min
Average arrival delay
2.4%
Cancelled
0 min
Median arrival delay

Based on 167 historical flights. Data through May 2026.

What the data says

The 12–3 PM departure wins.

F9 4758 departing between 12–3 PM arrived on time 73% of the time, versus 58% between 6–9 PM.

Friday is doing you no favors.

F9 4758 arrived on time 90% of the time on Wednesdays and just 47% on Fridays. That gap is worth planning around.

Well behind the ONT–LAS route.

F9 4758 arrived on time 63% of the time, versus 79% across the ONT–LAS route.

Lagging the Frontier Airlines network.

F9 4758 arrived on time 63% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon50%(34 flights)
  • Tue64%(11 flights)
  • Wed90%(19 flights)
  • Thu74%(27 flights)
  • Fri47%(36 flights)
  • Sat—(7 flights)
  • Sun59%(29 flights)
On-time by departure window
  • 12–3 PM73%(11 flights)
  • 3–6 PM68%(59 flights)
  • 6–9 PM58%(93 flights)
On-time trend by month
72%
May

Jun 36% → May 72% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202536%11
July 202554%13
August 202567%12
September 202531%13
October 202571%17
November 202553%17
December 202561%18
January 202675%16
February 202682%11
March 202671%14
May 202672%18
Departures on time
65%
Diverted
0%
Flights flown
163
Months covered
12

Same route, other flights

Keep nerding

Based on 167 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.