Route · SDF → IAD · 2020–2025 BTS data
Louisville to Washington
The SDF–IAD corridor (Louisville, KY → Washington, DC) runs ahead of the national average, served by 8 carriers across roughly 451 miles.
Data updated 2026-06-13
- 90.9%
- On-time
- +11.9 pts
- vs US avg
- 85 min
- Delay when late
- 2,264
- Flights
Cancelled
0.6%
Best Month
Oct 2024 97%
Worst Month
Aug 2024 92%
Distance
451 mi
Carriers
8
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Aug 2025 | 46 | 0 | 0 | 0 | YX |
| Jul 2025 | 58 | 4 | 0 | 0 | YX |
| May 2025 | 35 | 6 | 0 | 0 | UA,YX |
| Apr 2025 | 50 | 2 | 0 | 0 | YX |
| Mar 2025 | 57 | 2 | 0 | 0 | YX |
| Jan 2025 | 31 | 4 | 4 | 0 | YX |
| Dec 2024 | 34 | 6 | 0 | 0 | YX |
| Nov 2024 | 60 | 3 | 0 | 0 | YX |
| Oct 2024 | 62 | 2 | 0 | 0 | YX |
| Sep 2024 | 60 | 2 | 0 | 0 | YX |
| Aug 2024 | 62 | 5 | 1 | 0 | YX |
| Jul 2024 | 62 | 5 | 0 | 0 | YX |
| Jun 2024 | 60 | 2 | 0 | 0 | YX |
| May 2024 | 44 | 8 | 0 | 0 | YX,UA |
| Apr 2024 | 30 | 0 | 0 | 0 | YX |
| Mar 2024 | 31 | 1 | 0 | 0 | YX |
| Jan 2024 | 30 | 3 | 0 | 0 | YX |
| Dec 2023 | 31 | 2 | 0 | 1 | YX |
| Nov 2023 | 30 | 2 | 0 | 0 | YX |
| Oct 2023 | 31 | 1 | 0 | 0 | YX |
| Sep 2023 | 30 | 3 | 0 | 0 | YX |
| Aug 2023 | 31 | 1 | 0 | 0 | YX |
| Jul 2023 | 32 | 3 | 1 | 0 | YX |
| Jun 2023 | 58 | 3 | 0 | 1 | YX |
Cancellation Rate
0.6%
6 of 1,055 flights
Diversion Rate
0.2%
2 of 1,055 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 →IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
Destination airport →Compare the two airports
See SDF and IAD 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–IAD.
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What the Data Says About SDF to IAD
Louisville to Washington (SDF to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 90.9% on-time rate across 2,264 flights, with delays that do happen averaging 85.0 minutes. The corridor runs roughly 451 miles and is served by 8 carriers. Over the most recent 24 months, 6 of 1,055 flights were cancelled (0.6%) and 2 diverted (0.2%).
Monthly on-time rates stay fairly consistent on this route, ranging from 92% in Aug 2024 to 97% in Oct 2024 - only a 5-point spread.
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.