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Flight Reliability

B6 504 · JetBlue Airways

San Juan → New York (SJU–JFK)

87
Pretty Reliable
WanderNerd Reliability Score
87%
Arrive within 15 minutes
1 min
Average arrival delay
1.8%
Cancelled
15 min early
Median arrival delay

Based on 114 historical flights. Data through May 2026.

What the data says

Tuesdays have been rough.

B6 504 arrived on time 100% of the time on Saturdays and just 77% on Tuesdays. That gap is worth planning around.

A bit ahead of the SJU–JFK route.

B6 504 arrived on time 87% of the time, versus 80% across the SJU–JFK route.

Better than the JetBlue Airways network average.

B6 504 arrived on time 87% of the time, versus 73% across the JetBlue Airways network.

The breakdown

On-time by weekday
  • Mon77%(17 flights)
  • Tue77%(17 flights)
  • Wed92%(13 flights)
  • Thu93%(15 flights)
  • Fri81%(16 flights)
  • Sat100%(15 flights)
  • Sun90%(19 flights)
On-time by departure window
  • 12–3 AM—(1 flights)
  • 3–6 AM87%(111 flights)
On-time trend by month
100%
May

Jun 90% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202579%29
August 202587%31
May 2026100%11
Departures on time
87%
Diverted
0%
Flights flown
112
Months covered
6

Same route, other flights

Keep nerding

Based on 114 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.