Flight Reliability
F9 4315 · Frontier Airlines
Atlanta → Los Angeles (ATL–LAX)
73
Usually Fine
WanderNerd Reliability Score
- 71%
- Arrive within 15 minutes
- 11 min
- Average arrival delay
- 1.3%
- Cancelled
- 2 min early
- Median arrival delay
Based on 317 historical flights. Data through May 2026.
What the data says
Friday is doing you no favors.
F9 4315 arrived on time 86% of the time on Wednesdays and just 63% on Fridays. That gap is worth planning around.
Lagging the ATL–LAX route.
F9 4315 arrived on time 71% of the time, versus 79% across the ATL–LAX route.
The breakdown
- Mon69%(48 flights)
- Tue76%(42 flights)
- Wed86%(42 flights)
- Thu71%(49 flights)
- Fri63%(49 flights)
- Sat69%(35 flights)
- Sun67%(48 flights)
- 6–9 AM71%(17 flights)
- 9 AM–12 PM71%(283 flights)
- 12–3 PM69%(13 flights)
71%
May
Jun 47% → May 71% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 47% | 19 |
| July 2025 | 65% | 17 |
| August 2025 | 67% | 21 |
| September 2025 | 90% | 30 |
| October 2025 | 94% | 16 |
| November 2025 | 77% | 30 |
| December 2025 | 77% | 30 |
| January 2026 | 55% | 31 |
| February 2026 | 75% | 28 |
| March 2026 | 77% | 30 |
| April 2026 | 60% | 30 |
| May 2026 | 71% | 31 |
- Departures on time
- 58%
- Diverted
- 0%
- Flights flown
- 313
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 317 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.