BOS (Boston) to SAT (San Antonio) flights arrive on time 82% of the time. The most reliable airline on this route is JetBlue Airways at 86%. The average delay is 78 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated August 2026.BOS → SAT
BOS (Boston) to SAT (San Antonio)
BOS → SAT on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is on time most of the time. About 82% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
JetBlue Airways edges out Delta Air Lines on this route — 86% vs 81% on time.
Airline Comparison
JetBlue Airways leads at 86% on time; Delta Air Lines trails at 81%.
Accurate?
Good to know
Departing from BOS
77% on timeExpect ~21 min sitting on the taxiway after your gate pushes back. BOS has long runway queues.
TSA is currently ~22 min. Best time: 4 AM (about 5 min).
Arriving at SAT
81% on timeWhen flights into SAT are late, the average delay is 70 minutes. Build buffer if you have ground plans.
If connecting at SAT: TSA is ~30 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what JetBlue Airways owes you — refund rights, action plan, complaint email. Free.
Flying out of BOS? 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.