SDF (Louisville) to BOS (Boston) flights arrive on time 73% of the time. The most reliable airline on this route is Republic Airways at 74%. The average delay is 72 minutes. Delays on this route are most often caused by air traffic and busy airspace.
Source: Bureau of Transportation Statistics. Updated May 2026.SDF → BOS
SDF (Louisville) to BOS (Boston)
SDF → BOS on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 73% of flights arrive on schedule.
Delays on this route are most often caused by air traffic and busy airspace.
Accurate?
Republic Airways is significantly more reliable on this route at 74% on time vs null at 53%.
Airline Comparison
Republic Airways leads at 74% on time; trails at 53%.
Accurate?
Good to know
Departing from SDF
81% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. SDF has long runway queues.
TSA 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.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.