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

San Juan, PR (SJU) to Chicago, IL (ORD) flight delay odds

76.7% of 1,397 official scheduled SJU-to-ORD flights arrived on time; 11.4% arrived at least 30 minutes late and 2.1% 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
76.7%arrived on time
11.4%30+ min late
2.1%cancelled
1,397scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.7%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted1.4%did not reach as scheduled
Average arrival+2.7 mincompleted flights

Which departure time was most reliable for SJU to ORD?

Among qualifying SJU-to-ORD departure window results, Early morning had the highest on-time rate: 90.7% of 431 flights. Afternoon was lowest at 68.7% across 751 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning43190.7%3.0%1.9%
Late morning5676.8%10.7%3.6%
Afternoon75168.7%16.5%0.8%
Evening8777.0%14.9%3.4%
Night7276.4%4.2%15.3%

Which weekday was most reliable for SJU to ORD?

Among qualifying SJU-to-ORD weekday results, Friday had the highest on-time rate: 79.6% of 206 flights. Monday was lowest at 72.8% across 206 flights.

DayFlightsOn time30+ minCancelled
Monday20672.8%14.1%1.9%
Tuesday20273.8%14.4%2.5%
Wednesday17778.5%10.2%2.3%
Thursday19976.4%7.5%0.0%
Friday20679.6%9.7%1.0%
Saturday20879.3%12.0%3.4%
Sunday19976.9%11.6%4.0%

Which airline was most reliable for SJU to ORD?

Among qualifying SJU-to-ORD airline results, United Airlines had the highest on-time rate: 80.9% of 665 flights. American Airlines was lowest at 71.4% across 426 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines66580.9%7.7%0.6%
American Airlines42671.4%16.2%1.9%
Spirit Airlines29474.8%13.3%6.1%
Frontier Airlines1283.3%0.0%0.0%

Which month was most reliable for SJU to ORD?

Among qualifying SJU-to-ORD month results, June 2026 had the highest on-time rate: 85.6% of 90 flights. March 2026 was lowest at 68.4% across 177 flights.

MonthFlightsOn time30+ minCancelled
July 202512684.9%7.1%0.0%
August 202511574.8%15.7%0.0%
September 20255170.6%13.7%0.0%
October 20257368.5%15.1%0.0%
November 202510074.0%14.0%1.0%
December 202512978.3%14.7%0.8%
January 202615470.1%11.7%8.4%
February 202613982.7%10.1%0.7%
March 202617768.4%14.1%6.8%
April 202613881.2%8.0%1.4%
May 202610581.0%7.6%0.0%
June 20269085.6%5.6%0.0%

What drove SJU to ORD delay minutes?

Late aircraft was the largest recorded SJU-to-ORD delay category, accounting for 34.5% of 19,119 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.5%
Late aircraft34.5%
National airspace23.9%
Weather8.0%
Security0.1%
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.