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 70-minute layover misses 2% of the time at 7 am and 38% of the time at 8 pm.

Nonstops


United	EWR	SDF	2h 25m	81%	5.1%	1,003	Flying now
Spirit	EWR	SDF	–	100%few flights	0.0%	4	Not 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.


United Details →	EWR 06:30 → DEN 08:45UA 670	1h 00m Denver	DEN 09:45 → SDF 14:28UA 1479	7h 58m	95%	85%
United Details →	EWR 06:00 → IAD 07:22UA 1366	1h 09m Dulles	IAD 08:31 → SDF 10:23UA 3526 · flown by Republic	4h 23m	98%	84%
American Details →	EWR 05:51 → DFW 08:40AA 2728	51m Dallas-Fort Worth	DFW 09:31 → SDF 12:48AA 3791 · flown by Envoy	6h 57m	90%	80%
Delta Details →	EWR 06:00 → ATL 08:24DL 2353	2h 06m Atlanta	ATL 10:30 → SDF 11:53DL 1481	5h 53m	94%	79%
Delta Details →	EWR 12:00 → ATL 14:20DL 2397	3h 39m Atlanta	ATL 17:59 → SDF 19:24DL 2831	7h 24m	98%	78%
American Details →	EWR 10:42 → ORD 12:25AA 3170	3h 37m Chicago	ORD 16:02 → SDF 18:36AA 4668 · flown by Republic	7h 56m	99%	77%
United Details →	EWR 14:12 → IAH 17:10UA 2690	1h 39m Houston	IAH 18:49 → SDF 22:15UA 4052 · flown by Mesa	8h 03m	91%	76%
American Details →	EWR 08:00 → DFW 10:51AA 1303	1h 16m Dallas-Fort Worth	DFW 12:07 → SDF 15:22AA 3758 · flown by Envoy	7h 22m	89%	75%
Tight connection: often missed
Delta Details →	EWR 06:00 → ATL 08:24DL 2353	46m Atlanta	ATL 09:10 → SDF 10:29DL 1374	4h 32m	69%	59%
United Details →	EWR 14:45 → ORD 16:28UA 2788	1h 22m Chicago	ORD 17:50 → SDF 20:23UA 3598 · flown by Republic	5h 38m	64%	46%
United Details →	EWR 18:15 → ORD 20:10UA 254	1h 15m Chicago	ORD 21:25 → SDF 23:59UA 3659 · flown by Republic	5h 44m	62%	39%

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 09m · leaves 06:00 2%

DEN · 1h 00m · leaves 06:30 5%

ORD · 1h 17m · leaves 07:59 9%

Afternoon and evening

ATL · 1h 16m · leaves 18:59 32%

ORD · 1h 15m · leaves 18:15 38%

IAD · 53m · leaves 15:08 41%

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 1012 EWR 06:00 → ATL Delta DL 1481 ATL 10:30 → SDF Connection details →	2h 07m	5h 53m	99%	84%
Delta DL 5764 EWR 09:30 → BOS American AA 3438 BOS 13:59 → SDF Connection details →	3h 04m	7h 10m	99%	82%
United UA 1525 EWR 10:24 → ORD American AA 4668 ORD 16:02 → SDF Connection details →	3h 56m	8h 14m	96%	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