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Flight Reliability

F9 3540 · Frontier Airlines

Las Vegas → Denver (LAS–DEN)

62
A Little Dicey
WanderNerd Reliability Score
65%
Arrive within 15 minutes
27 min
Average arrival delay
0.8%
Cancelled
2 min
Median arrival delay

Based on 238 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 68% of the time, against 65% between 3–6 PM.

Friday is doing you no favors.

F9 3540 arrived on time 83% of the time on Saturdays and just 46% on Fridays. That gap is worth planning around.

Lagging the LAS–DEN route.

F9 3540 arrived on time 65% of the time, versus 77% across the LAS–DEN route.

Lagging the Frontier Airlines network.

F9 3540 arrived on time 65% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon61%(36 flights)
  • Tue75%(28 flights)
  • Wed78%(27 flights)
  • Thu56%(39 flights)
  • Fri46%(39 flights)
  • Sat83%(30 flights)
  • Sun68%(37 flights)
On-time by departure window
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM68%(38 flights)
  • 3–6 PM65%(197 flights)
On-time trend by month
67%
May

Jun 25% → May 67% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202525%16
July 202556%27
August 202558%26
September 202553%17
October 202559%22
November 202577%13
January 202685%13
February 202672%25
March 202684%19
April 202682%28
May 202667%30
Departures on time
63%
Diverted
0%
Flights flown
236
Months covered
11

Same route, other flights

Keep nerding

Based on 238 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.