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Flight Reliability

F9 3155 · Frontier Airlines

Denver → Los Angeles (DEN–LAX)

87
Pretty Reliable
WanderNerd Reliability Score
83%
Arrive within 15 minutes
7 min early
Average arrival delay
1.1%
Cancelled
18 min early
Median arrival delay

Based on 91 historical flights. Data through May 2026.

What the data says

Morning flights do better here.

F9 3155 departing between 6–9 AM arrived on time 100% of the time, versus 67% between 6–9 PM.

Mondays have been rough.

F9 3155 arrived on time 95% of the time on Saturdays and just 42% on Mondays. That gap is worth planning around.

A bit ahead of the DEN–LAX route.

F9 3155 arrived on time 83% of the time, versus 80% across the DEN–LAX route.

Better than the Frontier Airlines network average.

F9 3155 arrived on time 83% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon42%(12 flights)
  • Tue90%(19 flights)
  • Wed95%(19 flights)
  • Thu—(4 flights)
  • Fri67%(12 flights)
  • Sat95%(21 flights)
  • Sun—(3 flights)
On-time by departure window
  • 6–9 AM100%(10 flights)
  • 3–6 PM100%(10 flights)
  • 6–9 PM67%(36 flights)
  • 9 PM–12 AM91%(34 flights)
On-time trend by month
95%
May

Sep 50% → May 95% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
September 202550%12
October 202570%10
December 2025100%10
January 2026100%14
May 202695%19
Departures on time
81%
Diverted
0%
Flights flown
90
Months covered
10

Same route, other flights

Keep nerding

Based on 91 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.