SAT (San Antonio) to BOS (Boston) flights arrive on time 65% of the time. The most reliable airline on this route is JetBlue Airways at 69%. The average delay is 104 minutes. Delays on this route are most often caused by air traffic and busy airspace.
Source: Bureau of Transportation Statistics. Updated May 2026.SAT → BOS
SAT (San Antonio) to BOS (Boston)
SAT → BOS on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 65% of flights arrive on schedule.
Delays on this route are most often caused by air traffic and busy airspace.
Accurate?
JetBlue Airways edges out Delta Air Lines on this route — 69% vs 63% on time.
Airline Comparison
JetBlue Airways leads at 69% on time; Delta Air Lines trails at 63%.
Accurate?
Good to know
Departing from SAT
81% on timeTSA is currently ~18 min. Best time: 4 AM (about 5 min).
Arriving at BOS
79% on timeWhen flights into BOS are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at BOS: TSA is ~21 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.