Sun, Oct 4 has passed, so this is the 12-month record.

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

Connect in the morning. The same one-hour layover misses 6% of the time at 9 am and 22% of the time at 10 pm.

Nonstops (seasonal or thin)


Southwest	DAL	SDF	2h 00m	77%	1.1%	350	Flying now

Best connections, one ticket

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 Dallas). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	DAL 08:30 → MDW 10:45WN 1356	2h 00m Chicago	MDW 12:45 → SDF 14:55WN 4473	5h 25m	100%	81%
Delta Details →	DAL 15:59 → ATL 19:14DL 512	3h 48m Atlanta	ATL 23:02 → SDF 00:26 +1DL 2624	7h 29m	97%	80%
Delta Details →	DAL 12:19 → ATL 15:31DL 1115	2h 28m Atlanta	ATL 17:59 → SDF 19:24DL 2831	6h 05m	96%	79%
Delta Details →	DAL 06:05 → ATL 09:15DL 516	1h 15m Atlanta	ATL 10:30 → SDF 11:53DL 1481	4h 48m	94%	79%
Delta Details →	DAL 10:09 → ATL 13:20DL 441	3h 05m Atlanta	ATL 16:25 → SDF 17:49DL 1126	6h 40m	98%	75%
Southwest Details →	DAL 07:05 → BNA 08:50WN 1519	1h 15m Nashville	BNA 10:05 → SDF 12:00WN 670	3h 55m	84%	71%
Southwest Details →	DAL 08:40 → DEN 09:45WN 239	3h 10m Denver	DEN 12:55 → SDF 17:25WN 1712	7h 45m	97%	69%
Southwest Details →	DAL 06:00 → BWI 09:55WN 1280	50m Baltimore	BWI 10:45 → SDF 12:30WN 1297	5h 30m	76%	67%

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

ATL · 1h 15m · leaves 06:05 6%

BNA · 1h 15m · leaves 07:05 16%

DEN · 1h 10m · leaves 10:45 18%

Afternoon and evening

ATL · 54m · leaves 12:19 22%

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.


Southwest WN 1296 DAL 06:00 → DEN United UA 1479 DEN 09:45 → SDF Connection details →	2h 45m	7h 28m	100%	89%
Southwest WN 1263 DAL 16:30 → ATL Delta DL 2624 ATL 23:02 → SDF Connection details →	3h 22m	6h 58m	92%	77%
Southwest WN 1766 DAL 09:30 → ATL Delta DL 1126 ATL 16:25 → SDF Connection details →	3h 50m	7h 19m	100%	76%

Rank all connections, any airlines →

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