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

No clear winner: Delta’s SDF → MSP flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


Delta	SDF	MSP	2h 12m	79%	1.5%	1,067	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SDF 06:00 → ATL 07:25DL 2407	2h 30m Atlanta	ATL 09:55 → MSP 11:30DL 2090	6h 30m	99%	87%
Delta Details →	SDF 08:10 → ATL 09:40DL 2299	2h 41m Atlanta	ATL 12:21 → MSP 13:57DL 2901	6h 47m	98%	85%
Delta Details →	SDF 07:50 → DTW 09:16DL 5824 · flown by Republic	3h 04m Detroit	DTW 12:20 → MSP 13:14DL 2697	6h 24m	98%	81%
Delta Details →	SDF 10:00 → ATL 11:24DL 1523	3h 07m Atlanta	ATL 14:31 → MSP 16:09DL 2825	7h 09m	98%	81%
United Details →	SDF 06:00 → IAD 07:35UA 3438 · flown by Republic	1h 10m Dulles	IAD 08:45 → MSP 10:28UA 1998	5h 28m	93%	80%
American Details →	SDF 07:37 → PHL 09:38AA 4750 · flown by Republic	1h 02m Philadelphia	PHL 10:40 → MSP 12:38AA 5658 · flown by PSA	6h 01m	93%	80%
American Details →	SDF 06:00 → DCA 07:50AA 4549 · flown by Republic	2h 40m Washington	DCA 10:30 → MSP 12:20AA 3796 · flown by Envoy	7h 20m	99%	79%
American Details →	SDF 11:05 → ORD 11:44AA 4704 · flown by Republic	1h 52m Chicago	ORD 13:36 → MSP 15:20AA 4000 · flown by Envoy	5h 14m	99%	79%
Tight connection: often missed
United Details →	SDF 14:10 → ORD 14:50UA 5603 · flown by SkyWest	1h 13m Chicago	ORD 16:03 → MSP 17:53UA 5871 · flown by SkyWest	4h 43m	71%	48%
Delta Details →	SDF 17:26 → DTW 18:58DL 4947 · flown by Endeavor	1h 07m Detroit	DTW 20:05 → MSP 21:00DL 1303	4h 34m	71%	46%
United Details →	SDF 19:55 → ORD 20:40UA 4563 · flown by GoJet	48m Chicago	ORD 21:28 → MSP 23:10UA 1131	4h 15m	65%	35%

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

BNA · 55m · leaves 07:25 6%

ATL · 57m · leaves 10:00 6%

PHL · 1h 02m · leaves 07:37 7%

Afternoon and evening

MDW · 1h 15m · leaves 15:35 15%

DTW · 1h 07m · leaves 17:26 29%

ORD · 48m · leaves 19:55 35%

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.


United UA 3422 SDF 07:15 → ORD American AA 3719 ORD 11:45 → MSP Connection details →	3h 49m	7h 12m	99%	88%
United UA 3696 SDF 09:00 → ORD American AA 3375 ORD 11:47 → MSP Connection details →	2h 09m	5h 32m	97%	86%
Southwest WN 3604 SDF 07:25 → BNA Delta DL 2724 BNA 10:02 → MSP Connection details →	2h 47m	5h 50m	100%	85%

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