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 MDW → SDF flights land within a few points of 83% on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	MDW	SDF	1h 15m	83%	1.5%	978	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 Chicago). Layovers up to 4 hours. Pick a connection for the details.


Southwest + Deltatwo ticketsDetails →	MDW 05:15 → LGA 08:15WN 2801	2h 50m New York	LGA 11:05 → SDF 13:32DL 5637 · flown by Republic	7h 17m	100%	84%
Delta Details →	MDW 11:05 → ATL 14:01DL 1063	3h 58m Atlanta	ATL 17:59 → SDF 19:24DL 2831	7h 19m	99%	81%
Southwest Details →	MDW 08:55 → BWI 11:45WN 1355	2h 55m Baltimore	BWI 14:40 → SDF 16:25WN 4885	6h 30m	100%	81%
Southwest Details →	MDW 07:00 → BWI 09:45WN 2742	1h 00m Baltimore	BWI 10:45 → SDF 12:30WN 1297	4h 30m	91%	80%
Delta Details →	MDW 06:00 → ATL 08:55DL 1285	1h 35m Atlanta	ATL 10:30 → SDF 11:53DL 1481	4h 53m	94%	79%
Southwest + Americantwo ticketsDetails →	MDW 07:50 → CLT 10:55WN 2749	2h 31m Charlotte	CLT 13:26 → SDF 15:03AA 5397 · flown by PSA	6h 13m	100%	77%
Delta Details →	MDW 17:10 → ATL 20:22DL 1728	2h 40m Atlanta	ATL 23:02 → SDF 00:26 +1DL 2624	6h 18m	95%	77%
Southwest + Americantwo ticketsDetails →	MDW 06:00 → DCA 08:45WN 4976	3h 15m Washington	DCA 12:00 → SDF 13:48AA 4753 · flown by Republic	6h 48m	100%	77%

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

TPA · 55m · leaves 05:00 2%

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