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Flight Reliability

B6 1004 · JetBlue Airways

San Juan → New York (SJU–JFK)

51
A Little Dicey
WanderNerd Reliability Score
70%
Arrive within 15 minutes
26 min
Average arrival delay
4.3%
Cancelled
1 min early
Median arrival delay

Based on 254 historical flights. Data through May 2026.

What the data says

12–3 PM has a slight edge.

Departures between 12–3 PM arrived on time 73% of the time, against 67% between 3–6 PM.

Sunday scaries are real for this one.

B6 1004 arrived on time 77% of the time on Wednesdays and just 52% on Sundays. That gap is worth planning around.

Lagging the SJU–JFK route.

B6 1004 arrived on time 70% of the time, versus 80% across the SJU–JFK route.

Keep a backup plan handy.

B6 1004 was cancelled 4.3% of the time. Typical for U.S. flights is around 1–2%.

The breakdown

On-time by weekday
  • Mon71%(35 flights)
  • Tue72%(36 flights)
  • Wed77%(35 flights)
  • Thu77%(34 flights)
  • Fri74%(34 flights)
  • Sat69%(35 flights)
  • Sun52%(33 flights)
On-time by departure window
  • 12–3 PM73%(150 flights)
  • 3–6 PM67%(87 flights)
  • 6–9 PM—(2 flights)
  • 9 PM–12 AM—(3 flights)
On-time trend by month
75%
May

Jun 90% → May 75% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%19
July 202569%29
August 202568%31
November 202558%26
December 202583%29
January 202655%29
February 202656%25
March 202673%11
April 202683%18
May 202675%20
Departures on time
65%
Diverted
0.4%
Flights flown
242
Months covered
12

Same route, other flights

Keep nerding

Based on 254 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.