ATL (Atlanta) to SJU (San Juan) flights arrive on time 76% of the time. The most reliable airline on this route is Delta Air Lines at 79%. The average delay is 60 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated March 2026.ATL → SJU
ATL (Atlanta) to SJU (San Juan)
ATL → SJU on-time performance by month
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This route is on time most of the time. About 76% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Delta Air Lines is significantly more reliable on this route at 79% on time vs Frontier Airlines at 57%.
Airline Comparison
Delta Air Lines leads at 79% on time; Frontier Airlines trails at 57%.
Accurate?
Good to know
Departing from ATL
83% on timeExpect ~16 min sitting on the taxiway after your gate pushes back. ATL has long runway queues.
TSA is currently ~9 min. Best time: 4 AM (about 5 min).
Arriving at SJU
75% on timeWhen flights into SJU are late, the average delay is 75 minutes. Build buffer if you have ground plans.
If connecting at SJU: TSA is ~15 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.