ON TIMEBOARD
SDF Louisville / LAS Las Vegas

SDF → LAS on time

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

On time
83%
arrived < 15 min late
Cancelled
0.8%
399 flights
Typical arrival
−7 min
median vs schedule
When late
+79 min
average delay
Flights / day
1
3 airlines

83% of flights from Louisville to Las Vegas arrived on time over the past 12 months. That is better than the typical U.S. route. 9% 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 SDF → LAS: when a flight was late, it was under 45 minutes late 44% of the time. About 1 in 14 flights landed an hour or more late, and 1 in 50 three hours or more; 0.8% 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 Airlines36584%0.8%−7 min6.0%+66 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 SDF). Delays build through the day as late planes knock on, so early flights usually do best.

40%70%100%6 a.m. departures: 91% on time (104 flights)916a7 a.m. departures: too few flights (46 flights)7a8 a.m. departures: too few flights (59 flights)8a9 a.m. departures: too few flights9a10 a.m. departures: too few flights (16 flights)10a11 a.m. departures: too few flights (21 flights)11anoon departures: too few flights (4 flights)12p1 p.m. departures: too few flights (32 flights)1p2 p.m. departures: too few flights (19 flights)2p3 p.m. departures: too few flights (31 flights)3p4 p.m. departures: too few flights (44 flights)4p
SDF → LAS, 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
6 a.m.91%

By month

Each calendar month pooled over 2023–2026. Best: November (89%). Worst: May (74%).

40%70%100%Jan: too few flights (99 flights)JanFeb: too few flights (81 flights)FebMar: too few flights (92 flights)MarApr: 82% on time (102 flights)82AprMay: 74% on time (114 flights)74MayJun: 76% on time (107 flights)76JunJul: 78% on time (112 flights)78JulAug: 79% on time (115 flights)79AugSep: 77% on time (157 flights)77SepOct: 81% on time (157 flights)81OctNov: 89% on time (120 flights)89NovDec: 88% on time (123 flights)88Dec

By day of week

DayFlightsOn timeCancelled
Monday61——
Tuesday52——
Wednesday52——
Thursday60——
Friday60——
Saturday52——
Sunday62——

Why flights were late

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

Airline (crew, maintenance, ops) 44%Late inbound plane 34%Air traffic & airport (NAS) 19%Severe weather 2%

Cancellations: weather 3

Month by month

Not enough months with data to draw a trend.

Worst days in the past year

DateFlightsOn timeCancelled
May 3, 202630%0

Questions

How often are flights from SDF to LAS on time?

83% of 399 scheduled flights from Louisville, KY to Las Vegas, NV arrived within 15 minutes of schedule between September 2025 and August 2026. 0.8% were cancelled.

What month has the most delays from SDF to LAS?

May (74% on time). The best month is November (89%), 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.