Route · BWI → SDF · 2020–2025 BTS data
Baltimore to Louisville
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BWI to SDF (Baltimore to Louisville) ranks #2562 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 78.4%
- On-time
- -0.6 pts
- vs US avg
- 56 min
- Delay when late
- 4,770
- Flights
- #2562 of 4927
- Corpus placement
Cancelled
1.4%
Best Month
Sep 2025 88%
Worst Month
Jul 2024 59%
Distance
495 mi
Carriers
2
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 66 | 13 | 1 | 0 | WN |
| Nov 2025 | 73 | 11 | 5 | 0 | WN |
| Oct 2025 | 95 | 20 | 0 | 0 | WN |
| Sep 2025 | 77 | 9 | 0 | 0 | WN |
| Aug 2025 | 80 | 16 | 1 | 0 | WN |
| Jul 2025 | 81 | 31 | 8 | 0 | WN |
| Jun 2025 | 83 | 22 | 2 | 0 | WN |
| May 2025 | 80 | 19 | 0 | 0 | WN |
| Apr 2025 | 72 | 16 | 0 | 0 | WN |
| Mar 2025 | 62 | 9 | 1 | 0 | WN |
| Feb 2025 | 56 | 9 | 0 | 0 | WN |
| Jan 2025 | 63 | 10 | 3 | 0 | WN |
| Dec 2024 | 67 | 12 | 0 | 0 | WN |
| Nov 2024 | 73 | 10 | 0 | 0 | WN |
| Oct 2024 | 86 | 19 | 1 | 0 | WN |
| Sep 2024 | 77 | 14 | 0 | 0 | WN |
| Aug 2024 | 80 | 26 | 1 | 0 | WN |
| Jul 2024 | 80 | 33 | 0 | 0 | WN |
| Jun 2024 | 81 | 21 | 0 | 0 | WN |
| May 2024 | 80 | 21 | 0 | 0 | WN |
| Apr 2024 | 77 | 20 | 0 | 0 | WN |
| Mar 2024 | 75 | 16 | 0 | 0 | WN |
| Feb 2024 | 51 | 8 | 0 | 0 | WN |
| Jan 2024 | 68 | 16 | 2 | 0 | WN |
BWI–SDF seasonal on-time pattern
Best: September (84.4%) · weakest: July (64.5%)
Strongest calendar month
September
84.4% on-time · ~73 flights/mo
Busiest calendar month
October
~79 flights/mo avg
Weakest calendar month
July
64.5% on-time · ~73 flights/mo
Cancellation Rate
1.4%
25 of 1,783 flights
Diversion Rate
0.0%
0 of 1,783 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BWI - Baltimore
Full on-time, delay-cause, and seasonal performance for Baltimore, MD.
BWI on-time profileSDF - Louisville
Full on-time, delay-cause, and seasonal performance for Louisville, KY.
SDF on-time profileCompare the two airports
See BWI and SDF side by side on delays, cancellations, and reliability.
Compare BWI vs SDFOrigin-hub reliability standing
Mid-pack among BWI departures
From BWI, this corridor sits with 53 other 75–85% on-time routes out of 64 tracked departures, not the hub's reliability leaders (0 at ≥85%) and not the softest ( 11 below 75%). Destination: Louisville · fleet on-time rank #3711 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to BWI–SDF.
Routes with a similar on-time rate
What the Data Says About BWI to SDF
The Baltimore to Louisville corridor (BWI to SDF) posts a 78.4% on-time rate on the lower edge of the average band, based on 4,770 tracked flights. Late flights run 56.4 minutes behind on average. 2 carriers cover the 495-mile route; over the last 24 months, 25 of 1,783 flights were cancelled (1.4%) and 0.0% diverted.
The monthly split is wide on this route: Sep 2025 posted the strongest performance at 88% on-time, while Jul 2024 came in at just 59% - a 30-point swing worth factoring into travel timing.
On the multi-year calendar, BWI–SDF peaks in September at 84.4% on-time while October carries the heaviest traffic (~79 flights per month) ; the softest month is July at 64.5%, a 19.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BWI to SDF rank among US routes by traffic? ▼
How often are flights delayed from BWI to SDF? ▼
What is the cancellation rate for BWI to SDF? ▼
How far is the flight from BWI to SDF? ▼
When is the best time to fly from BWI to SDF? ▼
Airports on this route
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.
Using BWI–SDF data
BWI–SDF is mid-pack at 78.4% on-time; month and carrier mix move more than the corridor headline.
- Compare BWI and SDF airport profiles: delay causes and top routes differ even on the same corridor. BWI airport
- If your dates flex, September (84.4% on-time) beats July (64.5%) on this corridor. Seasonal chart
- 4 other routes post a similar 78.4% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
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.