BWI (Baltimore) to SAT (San Antonio) flights arrive on time 75% of the time. The most reliable airline on this route is Southwest Airlines at 75%. The average delay is 54 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated October 2026.BWI → SAT
BWI (Baltimore) to SAT (San Antonio)
BWI → SAT on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is delayed fairly often. About 75% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Airlines are roughly equal on this route — Southwest Airlines leads slightly at 75% vs Spirit Airlines at 74%.
Airline Comparison
Southwest Airlines leads at 75% on time; Spirit Airlines trails at 74%.
Accurate?
Good to know
Departing from BWI
79% on timeTSA is currently ~14 min. Best time: 4 AM (about 5 min).
Arriving at SAT
80% on timeWhen flights into SAT are late, the average delay is 69 minutes. Build buffer if you have ground plans.
If connecting at SAT: TSA is ~26 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Southwest Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of BWI? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.