Route · BOS → SDF · 2020–2025 BTS data
Boston to Louisville
The BOS–SDF corridor (Boston, MA → Louisville, KY) runs ahead of the national average, served by 6 carriers across roughly 829 miles.
Data updated 2026-06-13
- 88.3%
- On-time
- +9.3 pts
- vs US avg
- 66 min
- Delay when late
- 2,059
- Flights
Cancelled
0.4%
Best Month
Mar 2024 98%
Worst Month
Dec 2025 74%
Distance
829 mi
Carriers
6
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 58 | 15 | 1 | 1 | YX |
| Nov 2025 | 59 | 5 | 0 | 0 | YX |
| Oct 2025 | 61 | 9 | 0 | 0 | YX,MQ |
| Sep 2025 | 60 | 6 | 0 | 0 | MQ,YX |
| Aug 2025 | 61 | 8 | 0 | 0 | YX,MQ |
| Jul 2025 | 61 | 9 | 1 | 1 | YX |
| Jun 2025 | 60 | 10 | 0 | 1 | YX |
| May 2025 | 66 | 8 | 0 | 0 | YX,DL,MQ |
| Apr 2025 | 58 | 4 | 0 | 0 | MQ,YX |
| Mar 2025 | 52 | 3 | 0 | 0 | YX |
| Feb 2025 | 42 | 12 | 0 | 0 | YX |
| Jan 2025 | 51 | 6 | 2 | 0 | YX |
| Dec 2024 | 56 | 7 | 0 | 0 | YX |
| Nov 2024 | 57 | 4 | 0 | 0 | YX |
| Oct 2024 | 61 | 2 | 0 | 0 | YX |
| Sep 2024 | 59 | 1 | 0 | 0 | YX |
| Aug 2024 | 58 | 4 | 0 | 0 | YX |
| Jul 2024 | 59 | 6 | 0 | 1 | YX |
| Jun 2024 | 59 | 5 | 0 | 0 | YX |
| May 2024 | 62 | 11 | 0 | 0 | DL,YX |
| Apr 2024 | 56 | 4 | 0 | 0 | YX |
| Mar 2024 | 61 | 1 | 0 | 0 | YX |
| Feb 2024 | 54 | 1 | 1 | 0 | YX |
| Jan 2024 | 51 | 11 | 0 | 0 | YX |
Cancellation Rate
0.4%
5 of 1,382 flights
Diversion Rate
0.3%
4 of 1,382 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
Origin airport →SDF - Louisville
Full on-time, delay-cause, and seasonal performance for Louisville, KY.
Destination airport →Compare the two airports
See BOS and SDF side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to BOS–SDF.
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What the Data Says About BOS to SDF
Boston to Louisville (BOS to SDF) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88.3% on-time rate across 2,059 flights, with delays that do happen averaging 66.2 minutes. The corridor runs roughly 829 miles and is served by 6 carriers. Over the most recent 24 months, 5 of 1,382 flights were cancelled (0.4%) and 4 diverted (0.3%).
The monthly split is wide on this route: Mar 2024 posted the strongest performance at 98% on-time, while Dec 2025 came in at just 74% - a 24-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.