Flight Reliability
B6 1603 · JetBlue Airways
New York → San Juan (JFK–SJU)
78
Usually Fine
WanderNerd Reliability Score
- 81%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 2.8%
- Cancelled
- 9 min early
- Median arrival delay
Based on 281 historical flights. Data through May 2026.
What the data says
The 9 AM–12 PM departure wins.
B6 1603 departing between 9 AM–12 PM arrived on time 90% of the time, versus 79% between 6–9 AM.
Thursdays have been rough.
B6 1603 arrived on time 90% of the time on Wednesdays and just 73% on Thursdays. That gap is worth planning around.
Better than the JFK–SJU route average.
B6 1603 arrived on time 81% of the time, versus 72% across the JFK–SJU route.
Better than the JetBlue Airways network average.
B6 1603 arrived on time 81% of the time, versus 73% across the JetBlue Airways network.
The breakdown
- Mon84%(38 flights)
- Tue83%(36 flights)
- Wed90%(38 flights)
- Thu73%(40 flights)
- Fri82%(39 flights)
- Sat78%(40 flights)
- Sun81%(42 flights)
- 3–6 AM87%(77 flights)
- 6–9 AM79%(186 flights)
- 9 AM–12 PM90%(10 flights)
91%
May
Jun 90% → May 91% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 90% | 30 |
| July 2025 | 77% | 31 |
| August 2025 | 77% | 30 |
| September 2025 | 70% | 30 |
| October 2025 | 72% | 25 |
| November 2025 | 95% | 21 |
| December 2025 | 83% | 30 |
| January 2026 | 79% | 28 |
| February 2026 | 85% | 26 |
| March 2026 | 91% | 11 |
| May 2026 | 91% | 11 |
- Departures on time
- 85%
- Diverted
- 0%
- Flights flown
- 273
- Months covered
- 11
Same route, other flights
Keep nerding
Based on 281 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.