Route · SDF → BOS · 2020–2025 BTS data
Louisville to Boston
The SDF–BOS corridor (Louisville, KY → Boston, MA) runs behind the national average, served by 6 carriers across roughly 829 miles.
Data updated 2026-06-13
- 77.1%
- On-time
- -1.9 pts
- vs US avg
- 73 min
- Delay when late
- 2,059
- Flights
Cancelled
1.0%
Best Month
Feb 2024 91%
Worst Month
Sep 2025 40%
Distance
829 mi
Carriers
6
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 58 | 8 | 1 | 0 | YX |
| Nov 2025 | 59 | 12 | 0 | 0 | YX |
| Oct 2025 | 61 | 29 | 1 | 0 | YX,MQ |
| Sep 2025 | 60 | 36 | 2 | 1 | MQ,YX |
| Aug 2025 | 61 | 12 | 0 | 1 | YX,MQ |
| Jul 2025 | 61 | 18 | 1 | 0 | YX |
| Jun 2025 | 60 | 28 | 0 | 0 | YX |
| May 2025 | 66 | 28 | 0 | 0 | YX,DL,MQ |
| Apr 2025 | 58 | 16 | 0 | 0 | MQ,YX |
| Mar 2025 | 52 | 11 | 0 | 0 | YX |
| Feb 2025 | 42 | 13 | 0 | 0 | YX |
| Jan 2025 | 52 | 8 | 2 | 0 | YX |
| Dec 2024 | 55 | 8 | 2 | 0 | YX |
| Nov 2024 | 57 | 10 | 0 | 0 | YX |
| Oct 2024 | 61 | 8 | 0 | 0 | YX |
| Sep 2024 | 59 | 14 | 0 | 0 | YX |
| Aug 2024 | 58 | 17 | 1 | 2 | YX |
| Jul 2024 | 59 | 15 | 1 | 0 | YX |
| Jun 2024 | 59 | 15 | 2 | 0 | YX |
| May 2024 | 62 | 21 | 0 | 1 | DL,YX |
| Apr 2024 | 56 | 12 | 0 | 0 | YX |
| Mar 2024 | 61 | 7 | 0 | 0 | YX |
| Feb 2024 | 54 | 5 | 0 | 0 | YX |
| Jan 2024 | 52 | 13 | 1 | 0 | YX |
Cancellation Rate
1.0%
14 of 1,383 flights
Diversion Rate
0.4%
5 of 1,383 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
SDF - Louisville
Full on-time, delay-cause, and seasonal performance for Louisville, KY.
Origin airport →BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Destination airport →Compare the two airports
See SDF and BOS side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to SDF–BOS.
Routes with a similar on-time rate
What the Data Says About SDF to BOS
The Louisville to Boston corridor (SDF to BOS) posts a 77.1% on-time rate on the lower edge of the average band, based on 2,059 tracked flights. Late flights run 73.0 minutes behind on average. 6 carriers cover the 829-mile route; over the last 24 months, 14 of 1,383 flights were cancelled (1.0%) and 0.4% diverted.
The monthly split is wide on this route: Feb 2024 posted the strongest performance at 91% on-time, while Sep 2025 came in at just 40% - a 51-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.