BWI (Baltimore) to SJU (San Juan) flights arrive on time 70% of the time. The most reliable airline on this route is Spirit Airlines at 76%. The average delay is 66 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated August 2026.BWI → SJU
BWI (Baltimore) to SJU (San Juan)
BWI → SJU on-time performance by month
24
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JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is delayed fairly often. About 70% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Spirit Airlines is significantly more reliable on this route at 76% on time vs Frontier Airlines at 50%.
Airline Comparison
Spirit Airlines leads at 76% on time; Frontier Airlines trails at 50%.
Accurate?
Good to know
Departing from BWI
80% on timeTSA is currently ~27 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 ~28 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Spirit 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.
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.