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Route · SDF → BWI · 2020–2025 BTS data

Louisville to Baltimore

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SDF to BWI (Louisville to Baltimore) ranks #2549 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

85.7%
On-time
+6.7 pts
vs US avg
66 min
Delay when late
4,829
Flights
#2549 of 4927
Corpus placement

Cancelled

1.4%

Best Month

Mar 2024 92%

Worst Month

Jul 2024 68%

Distance

495 mi

Carriers

2

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 66 9 1 0 WN
Nov 2025 74 6 4 0 WN
Oct 2025 95 13 0 0 WN
Sep 2025 77 10 0 0 WN
Aug 2025 80 11 1 0 WN
Jul 2025 81 21 5 0 WN
Jun 2025 82 15 3 0 WN
May 2025 80 11 1 1 WN
Apr 2025 72 10 0 0 WN
Mar 2025 62 7 1 0 WN
Feb 2025 56 9 0 0 WN
Jan 2025 63 7 5 1 WN
Dec 2024 67 10 0 0 WN
Nov 2024 74 6 0 0 WN
Oct 2024 86 9 1 0 WN
Sep 2024 77 9 1 0 WN
Aug 2024 81 14 1 0 WN
Jul 2024 80 26 0 0 WN
Jun 2024 80 15 0 0 WN
May 2024 80 16 0 1 WN
Apr 2024 77 12 0 0 WN
Mar 2024 77 6 0 0 WN
Feb 2024 58 5 0 0 WN
Jan 2024 68 13 1 0 WN

SDF–BWI seasonal on-time pattern

Best: November (90.8%) · weakest: July (76.8%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 88%

Strongest calendar month

November

90.8% on-time · ~67 flights/mo

Busiest calendar month

October

~82 flights/mo avg

Weakest calendar month

July

76.8% on-time · ~73 flights/mo

Cancellation Rate

1.4%

25 of 1,793 flights

Diversion Rate

0.2%

3 of 1,793 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.

SDF on-time profile

BWI - Baltimore

Full on-time, delay-cause, and seasonal performance for Baltimore, MD.

BWI on-time profile

Compare the two airports

See SDF and BWI side by side on delays, cancellations, and reliability.

Compare SDF vs BWI

Origin-hub reliability standing

Among SDF's stronger departures

SDF → BWI posts a 85.7% on-time rate, landing in the ≥85% band with 9 of 23 BTS-tracked routes leaving Louisville. The same hub also shows 13 mid-band and 1 challenged departures · fleet-wide on-time rank #1003 of 4927 (highest on-time = #1).

What the Data Says About SDF to BWI

Louisville to Baltimore (SDF to BWI) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.7% on-time rate across 4,829 flights, with delays that do happen averaging 66.1 minutes. The corridor runs roughly 495 miles and is served by 2 carriers. Over the most recent 24 months, 25 of 1,793 flights were cancelled (1.4%) and 3 diverted (0.2%).

The monthly split is wide on this route: Mar 2024 posted the strongest performance at 92% on-time, while Jul 2024 came in at just 68% - a 25-point swing worth factoring into travel timing.

On the multi-year calendar, SDF–BWI peaks in November at 90.8% on-time while October carries the heaviest traffic (~82 flights per month) ; the softest month is July at 76.8%, a 14.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SDF to BWI rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SDF to BWI ranks #2549 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SDF to BWI? ▼
Flights from Louisville to Baltimore have a 85.7% on-time rate based on 4,829 flights. The average delay is 66.1 minutes. The best recent month was Mar 2024 with 92% on-time.
What is the cancellation rate for SDF to BWI? ▼
Over the last 24 months, 1.4% of flights on this route were cancelled (25 of 1,793 flights) and 0.2% were diverted.
How far is the flight from SDF to BWI? ▼
The flight distance from Louisville (SDF) to Baltimore (BWI) is approximately 495 miles. This route is served by 2 carriers.
When is the best time to fly from SDF to BWI? ▼
The best recent month for on-time performance was Mar 2024 (92% on-time). The worst was Jul 2024 (68% on-time). Consider booking during months with historically better performance.

Airports on this route

SDF Airport

Louisville
BWI Airport

Baltimore
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 SDF–BWI data

SDF–BWI runs 6.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SDF and BWI airport profiles: delay causes and top routes differ even on the same corridor. SDF airport
  • If your dates flex, November (90.8% on-time) beats July (76.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 85.7% 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.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

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.