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Route · SDF → IAH · 2020–2025 BTS data

Louisville to Houston

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SDF to IAH (Louisville to Houston) ranks #3891 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

83.1%
On-time
+4.1 pts
vs US avg
86 min
Delay when late
1,875
Flights
#3891 of 4927
Corpus placement

Cancelled

1.3%

Best Month

Jul 2022 92%

Worst Month

Aug 2021 67%

Distance

788 mi

Carriers

11

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Aug 2023 31 2 0 0 UA
Jul 2023 31 7 0 0 UA
Jun 2023 30 16 1 0 UA
May 2023 41 15 1 1 AA,MQ,NK,UA
Dec 2022 57 10 0 0 YV
Nov 2022 60 9 0 0 YV
Oct 2022 62 11 0 0 OO,YV
Sep 2022 57 7 0 0 OO,YV
Aug 2022 60 16 0 0 YV
Jul 2022 62 5 1 0 YV
Jun 2022 60 15 0 0 YV
May 2022 65 12 0 0 UA,YV
Apr 2022 51 8 1 0 YV
Mar 2022 57 6 0 0 YV
Feb 2022 56 10 2 0 YV,OO
Jan 2022 54 15 4 0 OO,YV
Dec 2021 60 13 4 1 OO,YV
Nov 2021 73 14 2 0 YV,OO
Oct 2021 83 13 0 1 OO,YV
Sep 2021 76 10 0 0 OO,YV
Aug 2021 58 19 0 0 YV
Jul 2021 57 12 0 0 YV
Jun 2021 54 16 1 1 YV
May 2021 31 1 0 0 UA,YV

SDF–IAH seasonal on-time pattern

Best: March (91.8%) · weakest: June (67.4%)

60%70%80%90%100% JanFebMarAprMayJunJulAugSepOctNovDec 81.1%

Strongest calendar month

March

91.8% on-time · ~61 flights/mo

Busiest calendar month

February

~69 flights/mo avg

Weakest calendar month

June

67.4% on-time · ~48 flights/mo

Cancellation Rate

1.3%

17 of 1,326 flights

Diversion Rate

0.3%

4 of 1,326 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

IAH - Houston

Full on-time, delay-cause, and seasonal performance for Houston, TX.

IAH on-time profile

Compare the two airports

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

Compare SDF vs IAH

Origin-hub reliability standing

Mid-pack among SDF departures

From SDF, this corridor sits with 13 other 75–85% on-time routes out of 23 tracked departures, not the hub's reliability leaders (9 at ≥85%) and not the softest ( 1 below 75%). Destination: Houston · fleet on-time rank #1929 of 4927.

What the Data Says About SDF to IAH

Bureau of Transportation Statistics records show Louisville to Houston (SDF to IAH) running a 83.1% on-time rate over 1,875 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 85.5 minutes. The 788-mile corridor is served by 11 carriers, and over the last 24 months 1.3% of 1,326 flights were cancelled, 0.3% diverted.

The monthly split is wide on this route: Jul 2022 posted the strongest performance at 92% on-time, while Aug 2021 came in at just 67% - a 25-point swing worth factoring into travel timing.

On the multi-year calendar, SDF–IAH peaks in March at 91.8% on-time while February carries the heaviest traffic (~69 flights per month) ; the softest month is June at 67.4%, a 24.4-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SDF to IAH rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SDF to IAH ranks #3891 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 IAH? ▼
Flights from Louisville to Houston have a 83.1% on-time rate based on 1,875 flights. The average delay is 85.5 minutes. The best recent month was Jul 2022 with 92% on-time.
What is the cancellation rate for SDF to IAH? ▼
Over the last 24 months, 1.3% of flights on this route were cancelled (17 of 1,326 flights) and 0.3% were diverted.
How far is the flight from SDF to IAH? ▼
The flight distance from Louisville (SDF) to Houston (IAH) is approximately 788 miles. This route is served by 11 carriers.
When is the best time to fly from SDF to IAH? ▼
The best recent month for on-time performance was Jul 2022 (92% on-time). The worst was Aug 2021 (67% on-time). Consider booking during months with historically better performance.

Airports on this route

SDF Airport

Louisville
IAH Airport

Houston
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–IAH data

SDF–IAH runs 4.1 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 IAH airport profiles: delay causes and top routes differ even on the same corridor. SDF airport
  • If your dates flex, March (91.8% on-time) beats June (67.4%) on this corridor. Seasonal chart
  • 4 other routes post a similar 83.1% 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.