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Airport Reliability

SJU · San Juan

Luis Muñoz Marín International Airport

77%
Departures within 15 minutes
16 min
Average departure delay
72%
Arrivals within 15 minutes
1.9%
Departures cancelled

Based on 35,483 departures and 35,482 arrivals. Data through May 2026.

What the data says

Morning flights do better here.

Departures from SJU departing between 6–9 AM arrived on time 89% of the time, versus 68% between 9 PM–12 AM.

Sunday scaries are real for this one.

Departures from SJU arrived on time 82% of the time on Wednesdays. On Sundays: 74%.

Ticking up lately.

Departures from SJU arrived on time 80% of the time over the last three months in the data, compared with 76% in the three months before that.

When SJU gets messy

On-time by departure window
  • 12–3 AM75%(1364 flights)
  • 3–6 AM86%(1930 flights)
  • 6–9 AM89%(7367 flights)
  • 9 AM–12 PM84%(3389 flights)
  • 12–3 PM78%(7020 flights)
  • 3–6 PM70%(7862 flights)
  • 6–9 PM71%(4602 flights)
  • 9 PM–12 AM68%(1151 flights)
On-time by weekday
  • Mon76%(5094 flights)
  • Tue81%(4447 flights)
  • Wed82%(4355 flights)
  • Thu79%(5062 flights)
  • Fri81%(5179 flights)
  • Sat77%(5258 flights)
  • Sun74%(5290 flights)
On-time trend by month
85%
May

Jun 83% → May 85% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202583%3143
July 202576%3344
August 202572%2936
September 202582%1958
October 202580%2169
November 202582%2679
December 202579%3324
January 202674%3033
February 202675%2735
March 202676%3351
April 202679%3156
May 202685%2857

Airlines departing SJU

Busiest routes from SJU

Based on 35,483 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.