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

San Juan, PR (SJU) to Detroit, MI (DTW) flight delay odds

81.2% of 384 official scheduled SJU-to-DTW flights arrived on time; 10.7% arrived at least 30 minutes late and 1.8% 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
81.2%arrived on time
10.7%30+ min late
1.8%cancelled
384scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.4%all scheduled flights
120+ minutes late1.6%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+0.0 mincompleted flights

Which departure time was most reliable for SJU to DTW?

Only Afternoon met the SJU-to-DTW departure window threshold: 80.6% of 345 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Afternoon34580.6%11.3%1.7%

Which weekday was most reliable for SJU to DTW?

Among qualifying SJU-to-DTW weekday results, Friday had the highest on-time rate: 85.2% of 61 flights. Saturday was lowest at 76.7% across 60 flights.

DayFlightsOn time30+ minCancelled
Monday6382.5%7.9%0.0%
Tuesday4680.4%15.2%2.2%
Wednesday4582.2%11.1%2.2%
Thursday5479.6%11.1%0.0%
Friday6185.2%11.5%0.0%
Saturday6076.7%6.7%6.7%
Sunday5581.8%12.7%1.8%

Which airline was most reliable for SJU to DTW?

Among qualifying SJU-to-DTW airline results, Delta Air Lines had the highest on-time rate: 81.8% of 324 flights. Spirit Airlines was lowest at 78.3% across 60 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines32481.8%10.5%1.9%
Spirit Airlines6078.3%11.7%1.7%

Which month was most reliable for SJU to DTW?

Among qualifying SJU-to-DTW month results, May 2026 had the highest on-time rate: 93.5% of 31 flights. January 2026 was lowest at 63.9% across 36 flights.

MonthFlightsOn time30+ minCancelled
July 20255889.7%5.2%1.7%
August 20253871.1%15.8%0.0%
September 20252085.0%10.0%0.0%
November 20252680.8%11.5%3.8%
December 20254374.4%20.9%2.3%
January 20263663.9%22.2%5.6%
February 20262885.7%3.6%0.0%
March 20263180.6%3.2%3.2%
April 20263086.7%6.7%0.0%
May 20263193.5%6.5%0.0%
June 20263080.0%10.0%3.3%

What drove SJU to DTW delay minutes?

Late aircraft was the largest recorded SJU-to-DTW delay category, accounting for 66.1% of 3,148 BTS-attributed delay minutes during July 2025–June 2026.

Airline13.5%
Late aircraft66.1%
National airspace20.3%
Weather0.1%
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.