ON TIMEBOARD
LAS Las Vegas / SDF Louisville

LAS → SDF on time

Las Vegas Harry Reid (Las Vegas, NV) to Louisville Muhammad Ali (Louisville, KY). Every scheduled flight, September 2025 to August 2026.

On time
69%
arrived < 15 min late
Cancelled
1.0%
399 flights
Typical arrival
−1 min
median vs schedule
When late
+56 min
average delay
Flights / day
1
3 airlines

69% of flights from Las Vegas to Louisville arrived on time over the past 12 months. That is worse than the typical U.S. route. 11% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for LAS → SDF: when a flight was late, it was under 45 minutes late 53% of the time. About 1 in 10 flights landed an hour or more late, and 1 in 200 three hours or more; 1.0% were cancelled outright.

Share of all 399 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Southwest Airlines36567%1.1%0 min10.7%+56 minSouthwest Airlines
Spirit Airlines33—————Spirit Airlines
American Airlines1—————American Airlines

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at LAS). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%7 a.m. departures: too few flights (40 flights)7a8 a.m. departures: too few flights (26 flights)8a9 a.m. departures: too few flights (5 flights)9a10 a.m. departures: too few flights (45 flights)10a11 a.m. departures: too few flights (40 flights)11anoon departures: too few flights (18 flights)12p1 p.m. departures: too few flights (5 flights)1p2 p.m. departures: too few flights (9 flights)2p3 p.m. departures: too few flights3p4 p.m. departures: too few flights (53 flights)4p5 p.m. departures: 61% on time (130 flights)615p6 p.m. departures: too few flights (28 flights)6p
LAS → SDF, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

By airline and hour

DepartsSouthwest Airlines
5 p.m.61%

By month

Each calendar month pooled over 2023–2026. Best: April (80%). Worst: June (62%).

40%70%100%Jan: too few flights (98 flights)JanFeb: too few flights (81 flights)FebMar: too few flights (92 flights)MarApr: 80% on time (103 flights)80AprMay: 62% on time (113 flights)62MayJun: 62% on time (107 flights)62JunJul: 64% on time (111 flights)64JulAug: 70% on time (115 flights)70AugSep: 71% on time (157 flights)71SepOct: 69% on time (157 flights)69OctNov: 72% on time (120 flights)72NovDec: 72% on time (123 flights)72Dec

By day of week

DayFlightsOn timeCancelled
Monday61——
Tuesday52——
Wednesday52——
Thursday61——
Friday60——
Saturday52——
Sunday61——

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Late inbound plane 49%Airline (crew, maintenance, ops) 42%Air traffic & airport (NAS) 8%Severe weather 2%

Cancellations: weather 3 · airline 1

Month by month

Not enough months with data to draw a trend.

Questions

How often are flights from LAS to SDF on time?

69% of 399 scheduled flights from Las Vegas, NV to Louisville, KY arrived within 15 minutes of schedule between September 2025 and August 2026. 1.0% were cancelled.

What month has the most delays from LAS to SDF?

June (62% on time). The best month is April (80%), over 2023–2026.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.