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


Southwest + Unitedtwo ticketsDetails →	DAL 06:00 → DEN 07:00WN 1296	2h 45m Denver	DEN 09:45 → SDF 14:28UA 1479	7h 28m	100%	89%
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%
Southwest + Deltatwo ticketsDetails →	DAL 09:30 → ATL 12:35WN 1766	3h 50m Atlanta	ATL 16:25 → SDF 17:49DL 1126	7h 19m	100%	76%
Southwest + Americantwo ticketsDetails →	DAL 06:10 → DCA 10:00WN 3351	2h 00m Washington	DCA 12:00 → SDF 13:48AA 4753 · flown by Republic	6h 38m	98%	76%
Southwest Details →	DAL 07:05 → BNA 08:50WN 1519	1h 15m Nashville	BNA 10:05 → SDF 12:00WN 670	3h 55m	84%	71%

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.

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