SJU (San Juan) to DTW (Detroit) flights arrive on time 83% of the time. The most reliable airline on this route is Delta Air Lines at 85%. The average delay is 68 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.SJU → DTW
SJU (San Juan) to DTW (Detroit)
SJU → DTW on-time performance by month
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This route is on time most of the time. About 83% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Airlines are roughly equal on this route — Delta Air Lines leads slightly at 85% vs Spirit Airlines at 82%.
Airline Comparison
Delta Air Lines leads at 85% on time; Spirit Airlines trails at 82%.
Accurate?
Good to know
Departing from SJU
76% on timeExpect ~18 min sitting on the taxiway after your gate pushes back. SJU has long runway queues.
TSA is currently ~28 min. Best time: 4 AM (about 8 min).
Arriving at DTW
80% on timeWhen flights into DTW are late, the average delay is 78 minutes. Build buffer if you have ground plans.
If connecting at DTW: TSA is ~11 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Delta Air Lines owes you — refund rights, action plan, complaint email. Free.
Flying out of SJU? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated August 2026. Source: Bureau of Transportation Statistics.