Flight Reliability
B6 1803 · JetBlue Airways
New York → San Juan (JFK–SJU)
76
Usually Fine
WanderNerd Reliability Score
- 82%
- Arrive within 15 minutes
- 2 min
- Average arrival delay
- 3.6%
- Cancelled
- 9 min early
- Median arrival delay
Based on 169 historical flights. Data through May 2026.
What the data says
Morning-you made the right choice.
B6 1803 departing between 3–6 AM arrived on time 94% of the time, versus 71% between 12–3 PM.
Thursdays have been rough.
B6 1803 arrived on time 92% of the time on Mondays and just 71% on Thursdays. That gap is worth planning around.
Better than the JFK–SJU route average.
B6 1803 arrived on time 82% of the time, versus 72% across the JFK–SJU route.
Better than the JetBlue Airways network average.
B6 1803 arrived on time 82% of the time, versus 73% across the JetBlue Airways network.
The breakdown
- Mon92%(24 flights)
- Tue91%(22 flights)
- Wed88%(24 flights)
- Thu71%(24 flights)
- Fri75%(24 flights)
- Sat81%(21 flights)
- Sun79%(24 flights)
- 3–6 AM94%(17 flights)
- 6–9 AM82%(131 flights)
- 9 AM–12 PM—(1 flights)
- 12–3 PM71%(14 flights)
80%
May
Nov 86% → May 80% on time
| Month | On-time percentage | Flights |
|---|---|---|
| November 2025 | 86% | 28 |
| December 2025 | 90% | 30 |
| February 2026 | 73% | 15 |
| March 2026 | 80% | 30 |
| April 2026 | 83% | 30 |
| May 2026 | 80% | 20 |
- Departures on time
- 87%
- Diverted
- 0%
- Flights flown
- 163
- Months covered
- 8
Same route, other flights
Keep nerding
Based on 169 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.