Flight Reliability
F9 1283 · Frontier Airlines
Las Vegas → Ontario (LAS–ONT)
90
Nerd Approved
WanderNerd Reliability Score
- 87%
- Arrive within 15 minutes
- 2 min early
- Average arrival delay
- 1.3%
- Cancelled
- 13 min early
- Median arrival delay
Based on 157 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
F9 1283 departing between 6–9 AM arrived on time 94% of the time, versus 47% between 3–6 PM.
Wednesdays have been rough.
F9 1283 arrived on time 93% of the time on Thursdays and just 60% on Wednesdays. That gap is worth planning around.
Better than the LAS–ONT route average.
F9 1283 arrived on time 87% of the time, versus 77% across the LAS–ONT route.
Better than the Frontier Airlines network average.
F9 1283 arrived on time 87% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon88%(33 flights)
- Tue80%(10 flights)
- Wed60%(10 flights)
- Thu93%(28 flights)
- Fri91%(35 flights)
- Sat—(7 flights)
- Sun88%(32 flights)
- 6–9 AM94%(110 flights)
- 9 AM–12 PM86%(21 flights)
- 12–3 PM—(9 flights)
- 3–6 PM47%(15 flights)
88%
May
Sep 100% → May 88% on time
| Month | On-time percentage | Flights |
|---|---|---|
| September 2025 | 100% | 17 |
| October 2025 | 94% | 18 |
| December 2025 | 55% | 11 |
| January 2026 | 79% | 19 |
| March 2026 | 87% | 15 |
| April 2026 | 89% | 28 |
| May 2026 | 88% | 25 |
- Departures on time
- 86%
- Diverted
- 0%
- Flights flown
- 155
- Months covered
- 10
Same route, other flights
Keep nerding
Based on 157 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.