Flight Reliability
F9 4218 · Frontier Airlines
Miami → New York (MIA–JFK)
85
Pretty Reliable
WanderNerd Reliability Score
- 87%
- Arrive within 15 minutes
- 0 min
- Average arrival delay
- 2.4%
- Cancelled
- 13 min early
- Median arrival delay
Based on 84 historical flights. Data through May 2026.
What the data says
Sunday scaries are real for this one.
F9 4218 arrived on time 100% of the time on Fridays and just 73% on Sundays. That gap is worth planning around.
Better than the MIA–JFK route average.
F9 4218 arrived on time 87% of the time, versus 72% across the MIA–JFK route.
Better than the Frontier Airlines network average.
F9 4218 arrived on time 87% of the time, versus 73% across the Frontier Airlines network.
The breakdown
- Mon91%(11 flights)
- Tue83%(12 flights)
- Wed75%(12 flights)
- Thu92%(12 flights)
- Fri100%(12 flights)
- Sat92%(12 flights)
- Sun73%(11 flights)
85%
Apr
Jan 100% → Apr 85% on time
| Month | On-time percentage | Flights |
|---|---|---|
| January 2026 | 100% | 11 |
| February 2026 | 93% | 27 |
| March 2026 | 77% | 31 |
| April 2026 | 85% | 13 |
- Departures on time
- 83%
- Diverted
- 0%
- Flights flown
- 82
- Months covered
- 4
Same route, other flights
Keep nerding
Based on 84 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.