ON TIMEBOARD
PHX Phoenix / SDF Louisville

PHX → SDF on time

Phoenix Sky Harbor (Phoenix, AZ) to Louisville Muhammad Ali (Louisville, KY). Every scheduled flight, September 2025 to August 2026.

On time
69%
arrived < 15 min late
Cancelled
0.5%
369 flights
Typical arrival
+2 min
median vs schedule
When late
+45 min
average delay
Flights / day
1
2 airlines

69% of flights from Phoenix to Louisville arrived on time over the past 12 months. That is worse 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 PHX → SDF: when a flight was late, it was under 45 minutes late 67% of the time. About 1 in 13 flights landed an hour or more late, and 1 in 369 three hours or more; 0.5% were cancelled outright.

Share of all 369 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Southwest Airlines36669%0.5%+2 min7.7%+45 minSouthwest Airlines
American Airlines3—————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 PHX). 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 (21 flights)7a8 a.m. departures: too few flights (23 flights)8a9 a.m. departures: too few flights (54 flights)9a10 a.m. departures: too few flights (17 flights)10a11 a.m. departures: too few flights (16 flights)11anoon departures: too few flights (52 flights)12p1 p.m. departures: too few flights (40 flights)1p2 p.m. departures: too few flights (14 flights)2p3 p.m. departures: too few flights3p4 p.m. departures: too few flights (31 flights)4p5 p.m. departures: too few flights (59 flights)5p6 p.m. departures: too few flights (27 flights)6p
PHX → 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 month

Each calendar month pooled over 2023–2026. Best: May (75%). Worst: March (72%).

40%70%100%Jan: too few flights (93 flights)JanFeb: too few flights (85 flights)FebMar: 72% on time (105 flights)72MarApr: too few flights (95 flights)AprMay: 75% on time (103 flights)75MayJun: too few flights (90 flights)JunJul: too few flights (93 flights)JulAug: too few flights (88 flights)AugSep: too few flights (87 flights)SepOct: too few flights (97 flights)OctNov: too few flights (87 flights)NovDec: too few flights (93 flights)Dec

By day of week

DayFlightsOn timeCancelled
Monday53——
Tuesday52——
Wednesday52——
Thursday53——
Friday53——
Saturday53——
Sunday53——

Why flights were late

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

Late inbound plane 55%Airline (crew, maintenance, ops) 34%Air traffic & airport (NAS) 11%

Cancellations: weather 2

Month by month

Not enough months with data to draw a trend.

Worst days in the past year

DateFlightsOn timeCancelled
Apr 30, 2026367%0

Questions

How often are flights from PHX to SDF on time?

69% of 369 scheduled flights from Phoenix, AZ to Louisville, KY arrived within 15 minutes of schedule between September 2025 and August 2026. 0.5% were cancelled.

What month has the most delays from PHX to SDF?

March (72% on time). The best month is May (75%), 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.