Flight Reliability
F9 4048 · Frontier Airlines
Las Vegas → Phoenix (LAS–PHX)
91
Nerd Approved
WanderNerd Reliability Score
- 88%
- Arrive within 15 minutes
- 5 min
- Average arrival delay
- 1.3%
- Cancelled
- 14 min early
- Median arrival delay
Based on 225 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
F9 4048 arrived on time 100% of the time on Wednesdays and just 82% on Mondays. That gap is worth planning around.
Better than the LAS–PHX route average.
F9 4048 arrived on time 88% of the time, versus 79% across the LAS–PHX route.
Better than the Frontier Airlines network average.
F9 4048 arrived on time 88% of the time, versus 73% across the Frontier Airlines network.
Trending in the right direction.
F9 4048 arrived on time 95% of the time over the last three months in the data, compared with 85% in the three months before that.
The breakdown
- Mon82%(44 flights)
- Tue85%(20 flights)
- Wed100%(13 flights)
- Thu94%(33 flights)
- Fri83%(48 flights)
- Sat91%(23 flights)
- Sun90%(41 flights)
- 6–9 AM89%(139 flights)
- 9 AM–12 PM87%(76 flights)
- 12–3 PM—(4 flights)
- 3–6 PM—(3 flights)
97%
May
Aug 92% → May 97% on time
| Month | On-time percentage | Flights |
|---|---|---|
| August 2025 | 92% | 13 |
| September 2025 | 92% | 13 |
| October 2025 | 83% | 24 |
| November 2025 | 69% | 26 |
| December 2025 | 92% | 25 |
| January 2026 | 93% | 27 |
| February 2026 | 100% | 19 |
| April 2026 | 87% | 23 |
| May 2026 | 97% | 30 |
- Departures on time
- 89%
- Diverted
- 0%
- Flights flown
- 222
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 225 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.