BWI (Baltimore) to SJU (San Juan) flights arrive on time 68% of the time. The most reliable airline on this route is Spirit Airlines at 74%. The average delay is 65 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated October 2026.BWI → SJU
BWI (Baltimore) to SJU (San Juan)
BWI → SJU on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 68% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Spirit Airlines is significantly more reliable on this route at 74% on time vs Frontier Airlines at 56%.
Airline Comparison
Spirit Airlines leads at 74% on time; Frontier Airlines trails at 56%.
Accurate?
Good to know
Departing from BWI
79% on timeTSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at SJU
75% on timeWhen flights into SJU are late, the average delay is 76 minutes. Build buffer if you have ground plans.
If connecting at SJU: TSA is ~7 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 October 2026. Source: Bureau of Transportation Statistics.