Route
SDF → BOS
Louisville Muhammad Ali International Airport Boston Logan International Airport
829 miles
Return route BOS → SDF →
How punctual is this route?
- On-time arrivals
- 71.0%
- Less than 15 minutes late
- Cancelled
- 2.1%
- Of scheduled flights
- Average delay when late
- 72 min
- Flights arriving 15+ minutes late
- Flights tracked
- 709
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 63%
- Late-arriving aircraft 22%
- Airline (crew, maintenance, cleaning) 13%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 36.8% | 60 |
| October 2025 | 51.7% | 61 |
| November 2025 | 79.7% | 59 |
| December 2025 | 86.0% | 58 |
| January 2026 | 87.0% | 51 |
| February 2026 | 80.4% | 49 |
| March 2026 | 82.0% | 61 |
| April 2026 | 64.5% | 62 |
| May 2026 | 73.4% | 64 |
| June 2026 | 75.0% | 60 |
| July 2026 | 66.1% | 62 |
| August 2026 | 73.8% | 62 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Republic Airways | 485 | 76.9% | 2.7% | 80 min |
| Envoy Air | 222 | 58.9% | 0.9% | 62 min |
| Delta Air Lines | 2 | 0.0% | 0.0% | 43 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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