Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Southwest’s HOU → SDF flights land within a few points of 72% on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	HOU	SDF	2h 10m	72%	0.7%	284	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Louisville on time. Total trip = scheduled departure to arrival, layover included (Louisville is 1 h ahead of Houston). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	HOU 05:25 → BWI 09:30WN 3797	1h 15m Baltimore	BWI 10:45 → SDF 12:30WN 1297	6h 05m	100%	87%
Southwest Details →	HOU 08:10 → MDW 10:40WN 1294	2h 05m Chicago	MDW 12:45 → SDF 14:55WN 4473	5h 45m	100%	85%
Delta Details →	HOU 06:00 → ATL 09:05DL 2557	1h 25m Atlanta	ATL 10:30 → SDF 11:53DL 1481	4h 53m	95%	81%
Southwest + Deltatwo ticketsDetails →	HOU 09:45 → ATL 12:48WN 1947	3h 37m Atlanta	ATL 16:25 → SDF 17:49DL 1126	7h 04m	100%	78%
American Details →	HOU 06:03 → DFW 07:29AA 5492 · flown by PSA	2h 02m Dallas-Fort Worth	DFW 09:31 → SDF 12:48AA 3791 · flown by Envoy	5h 45m	86%	77%
Delta Details →	HOU 17:12 → ATL 20:28DL 2381	2h 34m Atlanta	ATL 23:02 → SDF 00:26 +1DL 2624	6h 16m	94%	77%
Delta Details →	HOU 13:10 → ATL 16:18DL 1195	1h 41m Atlanta	ATL 17:59 → SDF 19:24DL 2831	5h 14m	90%	75%
American Details →	HOU 09:30 → DFW 10:59AA 3573 · flown by Envoy	3h 18m Dallas-Fort Worth	DFW 14:17 → SDF 17:32AA 4152 · flown by Envoy	7h 00m	98%	74%
Tight connection: often missed
Southwest Details →	HOU 15:58 → MDW 18:22WN 2042	1h 23m Chicago	MDW 19:45 → SDF 21:55WN 4597	4h 59m	57%	37%
Southwest Details →	HOU 17:40 → BNA 19:35WN 1957	55m Nashville	BNA 20:30 → SDF 22:25WN 671	3h 48m	42%	14%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

BWI · 1h 15m · leaves 05:25 0%

BNA · 55m · leaves 07:10 12%

DFW · 1h 08m · leaves 09:30 15%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON