SJU (San Juan) to BUF (Buffalo) flights arrive on time 89% of the time. The most reliable airline on this route is JetBlue Airways at 89%. The average delay is 67 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated July 2026.SJU → BUF
SJU (San Juan) to BUF (Buffalo)
SJU → BUF on-time performance by month
26
JanFebMarAprMayJunJulAugSepOctNovDec
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This route is usually on time. About 89% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
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 ~14 min. Best time: 10 PM (about 6 min).
Arriving at BUF
77% on timeWhen flights into BUF are late, the average delay is 72 minutes. Build buffer if you have ground plans.
If connecting at BUF: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
BUF has a 2.1% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
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Delay odds & gate info
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Data last updated July 2026. Source: Bureau of Transportation Statistics.