HOU to SDF flight delays & on-time performance
Nonstop flights from William P. Hobby Airport to Louisville Muhammad Ali International Airport · 803 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at HOU or SDF right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Houston (HOU) to Louisville (SDF) arrived on time 71% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 0.7% were cancelled, and 8% arrived an hour or more late.
- Southwest Airlines is the only airline reporting nonstop flights on this route.
- Departures scheduled around 1pm did best (82% on time); around 2pm did worst (45%).
- Friday was the most reliable day to fly (79% on time) and Sunday the least (60%).
- The largest source of delay minutes was late-arriving aircraft (50%).
Which airline is most on time from HOU to SDF?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Southwest Airlines | 71% | 0.7% | 15 min | 7.8% | 284 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 10am74%24 flights
- 11am71%34 flights
- 12pm76%21 flights
- 1pm82%79 flights
- 2pm45%47 flights
- 3pm57%14 flights
- 4pm79%47 flights
- 5pm77%13 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday69%0.0% cancelled
- Tuesday72%0.0% cancelled
- Wednesday73%0.0% cancelled
- Thursday77%0.0% cancelled
- Friday79%0.0% cancelled
- Saturday67%0.0% cancelled
- Sunday60%4.0% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft50%
- Airline (crew, maintenance, cleaning, fueling)32%
- Air traffic control & airport congestion12%
- Extreme weather5%
- Security1%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)50%
- Extreme weather50%
- Air traffic control & airport congestion0%
- Security0%
HOU to SDF: common questions
- How often are HOU to SDF flights on time?
- 71% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Houston to Louisville cancelled?
- 0.7% of scheduled flights were cancelled (2 of 284).
- How long are typical delays?
- Across all flights the average arrival delay was 15 min (early arrivals count as zero). Flights that were late arrived 47 min behind schedule on average, and 7.8% of flights were an hour or more late.
- How long is taxi time at HOU?
- Flights on this route spent 13 min taxiing from the gate to takeoff on average.
Related routes
Return trip: SDF to HOU — 81% on time
More flights from Houston
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: HOU → SDF, nonstop flights by US airlines that report to the DOT. How we calculate this.