Flight Reliability
F9 3645 · Frontier Airlines
Austin → Las Vegas (AUS–LAS)
85
Pretty Reliable
WanderNerd Reliability Score
- 83%
- Arrive within 15 minutes
- 1 min
- Average arrival delay
- 1.5%
- Cancelled
- 8 min early
- Median arrival delay
Based on 67 historical flights. Data through May 2026.
What the data says
12–3 PM has a slight edge.
Departures between 12–3 PM arrived on time 92% of the time, against 85% between 3–6 PM.
Sunday scaries are real for this one.
F9 3645 arrived on time 100% of the time on Saturdays and just 69% on Sundays. That gap is worth planning around.
Better than the AUS–LAS route average.
F9 3645 arrived on time 83% of the time, versus 75% across the AUS–LAS route.
Better than the Frontier Airlines network average.
F9 3645 arrived on time 83% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon—(9 flights)
- Tue—(3 flights)
- Wed—(0 flights)
- Thu94%(18 flights)
- Fri—(8 flights)
- Sat100%(12 flights)
- Sun69%(16 flights)
- 9 AM–12 PM—(2 flights)
- 12–3 PM92%(24 flights)
- 3–6 PM85%(27 flights)
- 6–9 PM—(7 flights)
- 9 PM–12 AM—(6 flights)
80%
Mar
Sep 94% → Mar 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| September 2025 | 94% | 16 |
| February 2026 | 80% | 15 |
| March 2026 | 80% | 10 |
- Departures on time
- 79%
- Diverted
- 0%
- Flights flown
- 66
- Months covered
- 7
Same route, other flights
Keep nerding
Based on 67 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.