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 80-minute layover misses 8% of the time at 8 am and 2 times in 5 at 8 pm.

Nonstops


American	ORD	SDF	1h 31m	80%	3.6%	1,313	Flying now
United	ORD	SDF	1h 32m	74%	3.7%	2,010	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 Chicago). Layovers up to 4 hours. Pick a connection for the details.


United Details →	ORD 06:00 → DEN 07:42UA 2806	2h 03m Denver	DEN 09:45 → SDF 14:28UA 1479	7h 28m	100%	88%
American Details →	ORD 05:00 → DFW 07:30AA 760	2h 01m Dallas-Fort Worth	DFW 09:31 → SDF 12:48AA 3791 · flown by Envoy	6h 48m	96%	88%
American Details →	ORD 08:30 → BOS 12:07AA 4106 · flown by Envoy	1h 52m Boston	BOS 13:59 → SDF 16:40AA 3438 · flown by Envoy	7h 10m	99%	83%
Delta Details →	ORD 05:30 → ATL 08:33DL 1264	1h 57m Atlanta	ATL 10:30 → SDF 11:53DL 1481	5h 23m	97%	82%
United Details →	ORD 06:30 → IAD 09:24UA 1689	3h 24m Dulles	IAD 12:48 → SDF 14:37UA 3980 · flown by Mesa	7h 07m	100%	81%
Delta Details →	ORD 11:23 → ATL 14:25DL 1147	3h 34m Atlanta	ATL 17:59 → SDF 19:24DL 2831	7h 01m	98%	80%
Delta Details →	ORD 06:00 → LGA 09:09DL 2767	1h 56m New York	LGA 11:05 → SDF 13:32DL 5637 · flown by Republic	6h 32m	98%	79%
American Details →	ORD 07:00 → DFW 09:35AA 1902	2h 32m Dallas-Fort Worth	DFW 12:07 → SDF 15:22AA 3758 · flown by Envoy	7h 22m	96%	78%
Tight connection: often missed
Delta Details →	ORD 08:52 → DTW 11:23DL 4456 · flown by SkyWest	50m Detroit	DTW 12:13 → SDF 13:39DL 5160 · flown by Endeavor	3h 47m	67%	50%
American Details →	ORD 18:47 → CLT 21:59AA 689	1h 03m Charlotte	CLT 23:02 → SDF 00:31 +1AA 671	4h 45m	69%	48%
Delta Details →	ORD 17:57 → MSP 19:38DL 1306	1h 11m Minneapolis	MSP 20:49 → SDF 23:51DL 5070 · flown by Endeavor	4h 52m	61%	30%

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 · 56m · leaves 08:40 9%

EWR · 53m · leaves 06:00 10%

DEN · 50m · leaves 07:05 11%

Afternoon and evening

ATL · 1h 05m · leaves 13:46 22%

CLT · 1h 03m · leaves 18:47 31%

MSP · 1h 11m · leaves 17:57 39%

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 425 ORD 07:12 → ATL Delta DL 3195 ATL 14:07 → SDF Connection details →	3h 40m	7h 19m	100%	78%
United UA 2617 ORD 06:00 → LGA Delta DL 5637 LGA 11:05 → SDF Connection details →	1h 54m	6h 32m	94%	78%
United UA 539 ORD 07:15 → DFW American AA 3758 DFW 12:07 → SDF Connection details →	2h 09m	7h 07m	91%	78%

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