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Flight Reliability

F9 2018 · Frontier Airlines

Las Vegas → St. Louis (LAS–STL)

84
Pretty Reliable
WanderNerd Reliability Score
89%
Arrive within 15 minutes
11 min early
Average arrival delay
2.4%
Cancelled
16 min early
Median arrival delay

Based on 126 historical flights. Data through May 2026.

What the data says

Skip Monday if you can.

F9 2018 arrived on time 91% of the time on Sundays. On Mondays: 79%.

Better than the LAS–STL route average.

F9 2018 arrived on time 89% of the time, versus 81% across the LAS–STL route.

Well ahead of the Frontier Airlines network.

F9 2018 arrived on time 89% of the time, versus 73% across the Frontier Airlines network.

The breakdown

On-time by weekday
  • Mon79%(29 flights)
  • Tue—(9 flights)
  • Wed—(6 flights)
  • Thu88%(16 flights)
  • Fri91%(32 flights)
  • Sat—(7 flights)
  • Sun91%(23 flights)
On-time by departure window
  • 6–9 AM90%(30 flights)
  • 9 AM–12 PM—(1 flights)
  • 12–3 PM89%(18 flights)
  • 3–6 PM88%(73 flights)
On-time trend by month
100%
May

Nov 91% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
November 202591%11
December 202587%15
January 202677%13
February 2026100%12
March 202691%22
April 202680%15
May 2026100%16
Departures on time
86%
Diverted
0.8%
Flights flown
122
Months covered
10

Same route, other flights

Keep nerding

Based on 126 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.