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Flight Reliability

B6 904 · JetBlue Airways

San Juan → New York (SJU–JFK)

70
Usually Fine
WanderNerd Reliability Score
73%
Arrive within 15 minutes
11 min
Average arrival delay
2.6%
Cancelled
4 min early
Median arrival delay

Based on 309 historical flights. Data through May 2026.

What the data says

Mornings have a slight edge.

Departures between 9 AM–12 PM arrived on time 74% of the time, against 67% between 12–3 PM.

Thursdays have been rough.

B6 904 arrived on time 82% of the time on Wednesdays and just 63% on Thursdays. That gap is worth planning around.

A bit behind the SJU–JFK route.

B6 904 arrived on time 73% of the time, versus 80% across the SJU–JFK route.

Trending in the right direction.

B6 904 arrived on time 84% of the time over the last three months in the data, compared with 70% in the three months before that.

The breakdown

On-time by weekday
  • Mon77%(43 flights)
  • Tue69%(45 flights)
  • Wed82%(45 flights)
  • Thu63%(43 flights)
  • Fri70%(43 flights)
  • Sat74%(38 flights)
  • Sun77%(44 flights)
On-time by departure window
  • 3–6 AM—(1 flights)
  • 6–9 AM—(3 flights)
  • 9 AM–12 PM74%(239 flights)
  • 12–3 PM67%(58 flights)
On-time trend by month
100%
May

Jun 83% → May 100% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%29
July 202573%30
August 202553%30
September 202570%30
October 202567%27
November 202589%18
December 202569%29
January 202686%29
February 202654%26
March 202681%31
April 202673%11
May 2026100%11
Departures on time
69%
Diverted
0%
Flights flown
301
Months covered
12

Same route, other flights

Keep nerding

Based on 309 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.