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 12% of the time at 11 am and almost half the time at 8 pm.

Nonstops


Delta	ATL	SDF	1h 21m	85%	1.4%	2,771	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. Layovers up to 4 hours. Pick a connection for the details.


American Details →	ATL 06:01 → DFW 07:33AA 2770	1h 58m Dallas-Fort Worth	DFW 09:31 → SDF 12:48AA 3791 · flown by Envoy	6h 47m	98%	89%
United Details →	ATL 05:30 → IAD 07:20UA 641	1h 11m Dulles	IAD 08:31 → SDF 10:23UA 3526 · flown by Republic	4h 53m	98%	86%
Southwest Details →	ATL 08:00 → MDW 08:55WN 1270	3h 50m Chicago	MDW 12:45 → SDF 14:55WN 4473	6h 55m	100%	83%
Southwest Details →	ATL 07:00 → BWI 08:50WN 4364	1h 55m Baltimore	BWI 10:45 → SDF 12:30WN 1297	5h 30m	97%	83%
United Details →	ATL 06:07 → EWR 08:25UA 299	1h 40m Newark	EWR 10:05 → SDF 12:21UA 3421 · flown by Republic	6h 14m	97%	82%
Delta Details →	ATL 06:00 → LGA 08:11DL 404	2h 54m New York	LGA 11:05 → SDF 13:32DL 5637 · flown by Republic	7h 32m	100%	81%
Southwest Details →	ATL 10:15 → BWI 12:10WN 186	2h 30m Baltimore	BWI 14:40 → SDF 16:25WN 4885	6h 10m	100%	81%
American Details →	ATL 12:25 → PHL 14:36AA 4338 · flown by Republic	58m Philadelphia	PHL 15:34 → SDF 17:45AA 4720 · flown by Republic	5h 20m	93%	80%
Tight connection: often missed
United Details →	ATL 15:30 → ORD 16:57UA 516	53m Chicago	ORD 17:50 → SDF 20:23UA 3598 · flown by Republic	4h 53m	67%	49%
United Details →	ATL 19:04 → ORD 20:30UA 1046	55m Chicago	ORD 21:25 → SDF 23:59UA 3659 · flown by Republic	4h 55m	54%	34%
American Details →	ATL 17:34 → DFW 19:08AA 1376	1h 02m Dallas-Fort Worth	DFW 20:10 → SDF 23:19AA 1365	5h 46m	44%	16%

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

IAD · 1h 11m · leaves 05:30 2%

PHL · 1h 20m · leaves 06:00 6%

DTW · 1h 03m · leaves 09:18 12%

Afternoon and evening

ORD · 55m · leaves 19:04 46%

DFW · 1h 02m · leaves 17:34 56%

MDW · 50m · leaves 17:55 67%

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.


Frontier F9 2510 ATL 05:30 → BWI Southwest WN 1297 BWI 10:45 → SDF Connection details →	3h 19m	7h 00m	94%	82%
Delta DL 839 ATL 07:40 → DFW American AA 3758 DFW 12:07 → SDF Connection details →	3h 07m	7h 42m	99%	82%
United UA 1239 ATL 11:29 → ORD American AA 4668 ORD 16:02 → SDF Connection details →	3h 10m	7h 09m	99%	80%

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