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Route · LGA → SDF · 2020–2025 BTS data

New York to Louisville

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), LGA to SDF (New York to Louisville) ranks #1781 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

85.5%
On-time
+6.5 pts
vs US avg
83 min
Delay when late
7,086
Flights
#1781 of 4927
Corpus placement

Cancelled

2.1%

Best Month

Sep 2024 95%

Worst Month

Jun 2025 67%

Distance

659 mi

Carriers

14

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 90 21 3 0 YX
Nov 2025 95 19 5 0 YX
Oct 2025 92 22 1 0 YX
Sep 2025 97 10 1 0 YX
Aug 2025 91 9 1 2 OO,YX
Jul 2025 115 34 6 0 OO,YX
Jun 2025 115 38 5 3 OO,YX
May 2025 139 29 4 0 AA,OO,YX
Apr 2025 138 26 0 0 YX
Mar 2025 139 14 1 0 YX
Feb 2025 124 27 1 0 YX
Jan 2025 128 22 5 0 YX
Dec 2024 119 12 0 0 9E,YX
Nov 2024 130 12 0 0 YX
Oct 2024 139 10 0 0 YX
Sep 2024 132 6 0 0 YX
Aug 2024 136 18 8 0 YX
Jul 2024 139 30 4 1 OO,YX
Jun 2024 128 15 5 1 9E,OO,YX
May 2024 144 19 3 0 9E,AA,OO,YX
Apr 2024 130 17 1 0 OO,YX
Mar 2024 129 8 0 0 YX,OO
Feb 2024 125 10 3 0 OO,YX
Jan 2024 126 21 5 1 YX,OO

LGA–SDF seasonal on-time pattern

Best: December (90.3%) · weakest: July (78.1%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 90.3%

Strongest calendar month

December

90.3% on-time · ~119 flights/mo

Busiest calendar month

March

~135 flights/mo avg

Weakest calendar month

July

78.1% on-time · ~114 flights/mo

Cancellation Rate

2.1%

62 of 2,940 flights

Diversion Rate

0.3%

8 of 2,940 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

LGA - New York

Full on-time, delay-cause, and seasonal performance for New York, NY.

LGA on-time profile

SDF - Louisville

Full on-time, delay-cause, and seasonal performance for Louisville, KY.

SDF on-time profile

Compare the two airports

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

Compare LGA vs SDF

Origin-hub reliability standing

Among LGA's stronger departures

LGA → SDF posts a 85.5% on-time rate, landing in the ≥85% band with 8 of 75 BTS-tracked routes leaving New York. The same hub also shows 64 mid-band and 3 challenged departures · fleet-wide on-time rank #1062 of 4927 (highest on-time = #1).

What the Data Says About LGA to SDF

New York to Louisville (LGA to SDF) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.5% on-time rate across 7,086 flights, with delays that do happen averaging 83.3 minutes. The corridor runs roughly 659 miles and is served by 14 carriers. Over the most recent 24 months, 62 of 2,940 flights were cancelled (2.1%) and 8 diverted (0.3%).

The monthly split is wide on this route: Sep 2024 posted the strongest performance at 95% on-time, while Jun 2025 came in at just 67% - a 29-point swing worth factoring into travel timing.

On the multi-year calendar, LGA–SDF peaks in December at 90.3% on-time while March carries the heaviest traffic (~135 flights per month) ; the softest month is July at 78.1%, a 12.2-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does LGA to SDF rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, LGA to SDF ranks #1781 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 LGA to SDF? ▼
Flights from New York to Louisville have a 85.5% on-time rate based on 7,086 flights. The average delay is 83.3 minutes. The best recent month was Sep 2024 with 95% on-time.
What is the cancellation rate for LGA to SDF? ▼
Over the last 24 months, 2.1% of flights on this route were cancelled (62 of 2,940 flights) and 0.3% were diverted.
How far is the flight from LGA to SDF? ▼
The flight distance from New York (LGA) to Louisville (SDF) is approximately 659 miles. This route is served by 14 carriers.
When is the best time to fly from LGA to SDF? ▼
The best recent month for on-time performance was Sep 2024 (95% on-time). The worst was Jun 2025 (67% on-time). Consider booking during months with historically better performance.

Airports on this route

LGA Airport

New York
SDF Airport

Louisville
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 LGA–SDF data

LGA–SDF runs 6.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare LGA and SDF airport profiles: delay causes and top routes differ even on the same corridor. LGA airport
  • If your dates flex, December (90.3% on-time) beats July (78.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 85.5% 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.