JAX (Jacksonville) to SJU (San Juan) flights arrive on time 75% of the time. The most reliable airline on this route is Frontier Airlines at 74%. The average delay is 135 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.JAX → SJU
JAX (Jacksonville) to SJU (San Juan)
JAX → SJU on-time performance by month
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This route is on time most of the time. About 75% 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 — Frontier Airlines leads slightly at 74% vs JetBlue Airways at 73%.
Airline Comparison
Frontier Airlines leads at 74% on time; JetBlue Airways trails at 73%.
Accurate?
Good to know
Departing from JAX
79% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. JAX has long runway queues.
TSA is currently ~29 min. Best time: 4 AM (about 5 min).
Arriving at SJU
76% 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 ~25 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Frontier Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of JAX? 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.