Flight Reliability
F9 2503 · Frontier Airlines
New York → Los Angeles (JFK–LAX)
72
Usually Fine
WanderNerd Reliability Score
- 73%
- Arrive within 15 minutes
- 14 min
- Average arrival delay
- 1.3%
- Cancelled
- 2 min
- Median arrival delay
Based on 233 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
F9 2503 arrived on time 91% of the time on Wednesdays and just 53% on Mondays. That gap is worth planning around.
A bit behind the JFK–LAX route.
F9 2503 arrived on time 73% of the time, versus 79% across the JFK–LAX route.
Ticking up lately.
F9 2503 arrived on time 75% of the time over the last three months in the data, compared with 71% in the three months before that.
The breakdown
- Mon53%(32 flights)
- Tue73%(33 flights)
- Wed91%(32 flights)
- Thu82%(33 flights)
- Fri70%(33 flights)
- Sat82%(33 flights)
- Sun58%(33 flights)
72%
Jan
Jun 77% → Jan 72% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 77% | 30 |
| July 2025 | 68% | 31 |
| August 2025 | 74% | 31 |
| September 2025 | 80% | 30 |
| October 2025 | 58% | 31 |
| November 2025 | 73% | 30 |
| December 2025 | 79% | 28 |
| January 2026 | 72% | 18 |
- Departures on time
- 81%
- Diverted
- 0.4%
- Flights flown
- 229
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 233 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.