Flight Reliability
B6 304 · JetBlue Airways
San Juan → New York (SJU–JFK)
55
A Little Dicey
WanderNerd Reliability Score
- 72%
- Arrive within 15 minutes
- 22 min
- Average arrival delay
- 4.3%
- Cancelled
- 4 min early
- Median arrival delay
Based on 233 historical flights. Data through May 2026.
What the data says
Morning flights do better here.
B6 304 departing between 3–6 AM arrived on time 91% of the time, versus 60% between 9 PM–12 AM.
Thursday is the weak spot.
B6 304 arrived on time 76% of the time on Saturdays. On Thursdays: 68%.
Lagging the SJU–JFK route.
B6 304 arrived on time 72% of the time, versus 80% across the SJU–JFK route.
Keep a backup plan handy.
B6 304 was cancelled 4.3% of the time. Typical for U.S. flights is around 1–2%.
The breakdown
- Mon75%(32 flights)
- Tue71%(28 flights)
- Wed69%(29 flights)
- Thu68%(34 flights)
- Fri74%(34 flights)
- Sat76%(33 flights)
- Sun72%(32 flights)
- 12–3 AM65%(26 flights)
- 3–6 AM91%(34 flights)
- 3–6 PM60%(15 flights)
- 6–9 PM71%(137 flights)
- 9 PM–12 AM60%(10 flights)
64%
May
Jun 83% → May 64% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 83% | 30 |
| July 2025 | 64% | 25 |
| August 2025 | 48% | 31 |
| September 2025 | 73% | 30 |
| October 2025 | 84% | 25 |
| November 2025 | 70% | 10 |
| December 2025 | 64% | 14 |
| February 2026 | 60% | 10 |
| March 2026 | 90% | 20 |
| April 2026 | 92% | 13 |
| May 2026 | 64% | 11 |
- Departures on time
- 73%
- Diverted
- 0.4%
- Flights flown
- 222
- Months covered
- 12
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.