BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
BOS→SDF

Boston, MA (BOS) to Louisville, KY (SDF) flight delay odds

83.9% of 707 official scheduled BOS-to-SDF flights arrived on time; 8.2% arrived at least 30 minutes late and 1.6% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALGenerally reliable
83.9%arrived on time
8.2%30+ min late
1.6%cancelled
707scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late3.4%all scheduled flights
120+ minutes late0.7%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival-4.3 mincompleted flights

Which departure time was most reliable for BOS to SDF?

Among qualifying BOS-to-SDF departure window results, Late morning had the highest on-time rate: 85.6% of 353 flights. Afternoon was lowest at 82.4% across 250 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning9284.8%2.2%4.3%
Late morning35385.6%7.6%2.0%
Afternoon25082.4%9.6%0.0%

Which weekday was most reliable for BOS to SDF?

Among qualifying BOS-to-SDF weekday results, Wednesday had the highest on-time rate: 91.2% of 102 flights. Tuesday was lowest at 81.1% across 106 flights.

DayFlightsOn time30+ minCancelled
Monday10483.7%6.7%4.8%
Tuesday10681.1%11.3%4.7%
Wednesday10291.2%3.9%0.0%
Thursday10181.2%8.9%0.0%
Friday10282.4%7.8%0.0%
Saturday9085.6%5.6%0.0%
Sunday10282.4%12.7%1.0%

Which airline was most reliable for BOS to SDF?

Among qualifying BOS-to-SDF airline results, Envoy Air had the highest on-time rate: 88.0% of 200 flights. Republic Airways was lowest at 82.6% across 505 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways50582.6%8.7%1.8%
Envoy Air20088.0%7.0%1.0%
Delta Air Lines20.0%0.0%0.0%

Which month was most reliable for BOS to SDF?

Among qualifying BOS-to-SDF month results, November 2025 had the highest on-time rate: 91.5% of 59 flights. January 2026 was lowest at 68.6% across 51 flights.

MonthFlightsOn time30+ minCancelled
July 20256182.0%9.8%1.6%
August 20256186.9%9.8%0.0%
September 20256090.0%5.0%0.0%
October 20256185.2%11.5%0.0%
November 20255991.5%5.1%0.0%
December 20255870.7%15.5%1.7%
January 20265168.6%9.8%9.8%
February 20264973.5%6.1%8.2%
March 20266190.2%4.9%0.0%
April 20266290.3%4.8%0.0%
May 20266487.5%6.2%0.0%
June 20266085.0%10.0%0.0%

What drove BOS to SDF delay minutes?

Airline was the largest recorded BOS-to-SDF delay category, accounting for 37.9% of 4,850 BTS-attributed delay minutes during July 2025–June 2026.

Airline37.9%
Late aircraft37.5%
National airspace22.5%
Weather2.2%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.