BWI (Baltimore) to BOS (Boston) flights arrive on time 76% of the time. The most reliable airline on this route is Republic Airways at 83%. The average delay is 68 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated April 2026.BWI → BOS
BWI (Baltimore) to BOS (Boston)
BWI → BOS on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is on time most of the time. About 76% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Republic Airways edges out Spirit Airlines on this route — 83% vs 73% on time.
Airline Comparison
Republic Airways leads at 83% on time; Spirit Airlines trails at 73%.
Accurate?
Good to know
Departing from BWI
78% on timeTSA is currently ~15 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.
Flight cancelled or delayed?
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Data last updated April 2026. Source: Bureau of Transportation Statistics.