BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
SJU→MIA

San Juan, PR (SJU) to Miami, FL (MIA) flight delay odds

76.9% of 2,642 official scheduled SJU-to-MIA flights arrived on time; 15.1% arrived at least 30 minutes late and 0.9% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
76.9%arrived on time
15.1%30+ min late
0.9%cancelled
2,642scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.3%all scheduled flights
120+ minutes late4.1%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+12.1 mincompleted flights

Which departure time was most reliable for SJU to MIA?

Among qualifying SJU-to-MIA departure window results, Early morning had the highest on-time rate: 91.9% of 480 flights. Evening was lowest at 65.1% across 614 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning48091.9%4.6%0.6%
Late morning58384.9%8.6%0.9%
Afternoon88572.5%17.9%0.9%
Evening61465.1%24.1%1.1%
Night8066.2%27.5%2.5%

Which weekday was most reliable for SJU to MIA?

Among qualifying SJU-to-MIA weekday results, Wednesday had the highest on-time rate: 83.6% of 318 flights. Sunday was lowest at 71.3% across 411 flights.

DayFlightsOn time30+ minCancelled
Monday40575.6%17.8%1.0%
Tuesday34376.1%14.6%1.2%
Wednesday31883.6%9.1%0.0%
Thursday38379.4%11.5%0.5%
Friday41281.3%12.1%0.0%
Saturday37071.9%19.7%2.4%
Sunday41171.3%20.0%1.5%

Which airline was most reliable for SJU to MIA?

Among qualifying SJU-to-MIA airline results, American Airlines had the highest on-time rate: 77.9% of 2,079 flights. Spirit Airlines was lowest at 69.6% across 184 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines2,07977.9%14.2%0.6%
Frontier Airlines37974.7%17.4%2.1%
Spirit Airlines18469.6%20.7%2.2%

Which month was most reliable for SJU to MIA?

Among qualifying SJU-to-MIA month results, June 2026 had the highest on-time rate: 87.4% of 214 flights. January 2026 was lowest at 67.6% across 250 flights.

MonthFlightsOn time30+ minCancelled
July 202521671.3%20.8%0.5%
August 202521073.3%18.1%0.5%
September 202516877.4%17.3%0.0%
October 202517673.9%11.9%0.0%
November 202521180.1%14.2%0.5%
December 202525882.2%9.7%0.8%
January 202625067.6%18.0%6.4%
February 202620780.2%15.5%1.0%
March 202627876.3%16.9%0.7%
April 202623873.9%16.8%0.0%
May 202621679.6%13.4%0.0%
June 202621487.4%8.9%0.0%

What drove SJU to MIA delay minutes?

Late aircraft was the largest recorded SJU-to-MIA delay category, accounting for 57.2% of 54,509 BTS-attributed delay minutes during July 2025–June 2026.

Airline32.6%
Late aircraft57.2%
National airspace8.0%
Weather2.2%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.