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Flight Reliability

B6 1233 · JetBlue Airways

Orlando → San Juan (MCO–SJU)

95
Nerd Approved
WanderNerd Reliability Score
92%
Arrive within 15 minutes
1 min early
Average arrival delay
1.2%
Cancelled
7 min early
Median arrival delay

Based on 343 historical flights. Data through May 2026.

What the data says

The 3–6 AM departure wins.

B6 1233 departing between 3–6 AM arrived on time 94% of the time, versus 85% between 9 AM–12 PM.

Thursday is the weak spot.

B6 1233 arrived on time 98% of the time on Fridays. On Thursdays: 86%.

Well ahead of the MCO–SJU route.

B6 1233 arrived on time 92% of the time, versus 74% across the MCO–SJU route.

Well ahead of the JetBlue Airways network.

B6 1233 arrived on time 92% of the time, versus 73% across the JetBlue Airways network.

The breakdown

On-time by weekday
  • Mon90%(50 flights)
  • Tue98%(42 flights)
  • Wed93%(45 flights)
  • Thu86%(51 flights)
  • Fri98%(50 flights)
  • Sat92%(50 flights)
  • Sun88%(51 flights)
On-time by departure window
  • 3–6 AM94%(216 flights)
  • 6–9 AM93%(70 flights)
  • 9 AM–12 PM85%(53 flights)
On-time trend by month
96%
May

Jun 90% → May 96% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%19
July 202597%31
August 202596%25
September 202583%30
October 202590%31
November 202590%29
December 202593%30
January 202693%29
February 202693%27
March 202694%31
April 202690%30
May 202696%27
Departures on time
93%
Diverted
0%
Flights flown
339
Months covered
12

Same route, other flights

Keep nerding

Based on 343 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.