Flight Reliability
F9 2017 · Frontier Airlines
St. Louis → Las Vegas (STL–LAS)
- 81%
- Arrive within 15 minutes
- 21 min
- Average arrival delay
- 1.2%
- Cancelled
- 12 min early
- Median arrival delay
Based on 172 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
F9 2017 departing between 6–9 PM arrived on time 90% of the time, versus 64% between 9 PM–12 AM.
Mondays have been rough.
F9 2017 arrived on time 91% of the time on Saturdays and just 69% on Mondays. That gap is worth planning around.
Better than the Frontier Airlines network average.
F9 2017 arrived on time 81% of the time, versus 73% across the Frontier Airlines network.
Recent months have been rougher.
F9 2017 arrived on time 68% of the time over the last three months in the data, compared with 91% in the three months before that.
The breakdown
- Mon69%(35 flights)
- Tue—(3 flights)
- Wed—(3 flights)
- Thu81%(42 flights)
- Fri89%(37 flights)
- Sat91%(11 flights)
- Sun78%(37 flights)
- 12–3 PM84%(109 flights)
- 3–6 PM88%(16 flights)
- 6–9 PM90%(10 flights)
- 9 PM–12 AM64%(33 flights)
Jun 71% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 71% | 17 |
| July 2025 | 82% | 17 |
| August 2025 | 82% | 17 |
| September 2025 | 90% | 20 |
| October 2025 | 94% | 18 |
| November 2025 | 87% | 15 |
| December 2025 | 92% | 12 |
| March 2026 | 82% | 11 |
| April 2026 | 50% | 10 |
| May 2026 | 71% | 14 |
- Departures on time
- 81%
- Diverted
- 1.2%
- Flights flown
- 168
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 172 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.