Flight Reliability
F9 4631 · Frontier Airlines
Austin → Las Vegas (AUS–LAS)
58
A Little Dicey
WanderNerd Reliability Score
- 66%
- Arrive within 15 minutes
- 15 min
- Average arrival delay
- 3.3%
- Cancelled
- 8 min early
- Median arrival delay
Based on 61 historical flights. Data through May 2026.
What the data says
The late departure is the smart one here.
F9 4631 departing between 9 PM–12 AM arrived on time 71% of the time, versus 64% between 6–9 PM.
Friday is doing you no favors.
F9 4631 arrived on time 73% of the time on Saturdays and just 54% on Fridays. That gap is worth planning around.
Lagging the AUS–LAS route.
F9 4631 arrived on time 66% of the time, versus 75% across the AUS–LAS route.
Lagging the Frontier Airlines network.
F9 4631 arrived on time 66% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon54%(13 flights)
- Tue—(1 flights)
- Wed—(3 flights)
- Thu—(9 flights)
- Fri54%(13 flights)
- Sat73%(11 flights)
- Sun—(9 flights)
- 12–3 PM—(1 flights)
- 3–6 PM—(5 flights)
- 6–9 PM64%(22 flights)
- 9 PM–12 AM71%(31 flights)
70%
Mar
Dec 55% → Mar 70% on time
| Month | On-time percentage | Flights |
|---|---|---|
| December 2025 | 55% | 11 |
| January 2026 | 50% | 10 |
| March 2026 | 70% | 10 |
- Departures on time
- 66%
- Diverted
- 0%
- Flights flown
- 59
- Months covered
- 9
Same route, other flights
Keep nerding
Based on 61 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.