BOS (Boston) to SDF (Louisville) flights arrive on time 90% of the time. The most reliable airline on this route is null at 91%. The average delay is 61 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.BOS → SDF
BOS (Boston) to SDF (Louisville)
BOS → SDF on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is usually on time. About 90% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Airlines are roughly equal on this route — null leads slightly at 91% vs Republic Airways at 89%.
Airline Comparison
leads at 91% on time; Republic Airways trails at 89%.
Accurate?
Good to know
Departing from BOS
79% on timeExpect ~19 min sitting on the taxiway after your gate pushes back. BOS has long runway queues.
TSA is currently ~21 min. Best time: 4 AM (about 5 min).
Arriving at SDF
81% on timeWhen flights into SDF are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at SDF: TSA is ~15 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what owes you — refund rights, action plan, complaint email. Free.
Let us watch your flight
We worry about delays, TSA, weather, and gates so you don't have to.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated May 2026. Source: Bureau of Transportation Statistics.