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 1 time in 10 at 11 am and 30% of the time at 7 pm.

Nonstops (seasonal or thin)


American	PHL	SDF	2h 16m	83%	2.4%	983	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. Layovers up to 4 hours. Pick a connection for the details.


American Details →	PHL 05:00 → DFW 07:35AA 1670	1h 56m Dallas-Fort Worth	DFW 09:31 → SDF 12:48AA 3791 · flown by Envoy	7h 48m	97%	88%
United Details →	PHL 06:10 → IAD 07:19UA 3693 · flown by Republic	1h 12m Dulles	IAD 08:31 → SDF 10:23UA 3526 · flown by Republic	4h 13m	97%	85%
Delta Details →	PHL 05:15 → ATL 07:22DL 1269	3h 08m Atlanta	ATL 10:30 → SDF 11:53DL 1481	6h 38m	99%	83%
Southwest Details →	PHL 08:00 → MDW 09:05WN 4202	3h 40m Chicago	MDW 12:45 → SDF 14:55WN 4473	6h 55m	97%	82%
American Details →	PHL 10:30 → BOS 12:03AA 1416	1h 56m Boston	BOS 13:59 → SDF 16:40AA 3438 · flown by Envoy	6h 10m	96%	81%
Delta Details →	PHL 12:02 → ATL 14:05DL 2270	3h 54m Atlanta	ATL 17:59 → SDF 19:24DL 2831	7h 22m	99%	80%
Delta Details →	PHL 06:00 → BOS 07:30DL 5740 · flown by Republic	1h 58m Boston	BOS 09:28 → SDF 12:09DL 5615 · flown by Republic	6h 11m	98%	80%
American Details →	PHL 05:15 → ORD 06:38AA 1652	1h 22m Chicago	ORD 08:00 → SDF 10:35AA 4704 · flown by Republic	5h 21m	89%	79%
Tight connection: often missed
Southwest Details →	PHL 17:20 → MDW 18:30WN 2756	1h 15m Chicago	MDW 19:45 → SDF 21:55WN 4597	4h 37m	61%	39%
American Details →	PHL 16:22 → DFW 19:09AA 2356	1h 01m Dallas-Fort Worth	DFW 20:10 → SDF 23:19AA 1365	6h 58m	70%	26%
United Details →	PHL 19:00 → ORD 20:33UA 2797	52m Chicago	ORD 21:25 → SDF 23:59UA 3659 · flown by Republic	4h 59m	28%	17%

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 12m · leaves 06:10 3%

DFW · 1h 04m · leaves 08:20 11%

Afternoon and evening

IAH · 1h 00m · leaves 13:04 13%

DFW · 1h 01m · leaves 16:22 30%

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