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% of the time at 9 am and 30% of the time at 8 pm.

Nonstops (seasonal or thin)


Southwest	LAS	SDF	3h 40m	70%	1.1%	365	Flying now
American	LAS	SDF	–	100%few flights	0.0%	1	Not flying now
Spirit	LAS	SDF	3h 40m	94%few flights	0.0%	33	Not 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 (Louisville is 3 h ahead of Las Vegas). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	LAS 23:55 → MDW 05:25WN 2276	2h 20m Chicago	MDW 07:45 → SDF 10:05 +1WN 1267	7h 10m	98%	93%
United + Americantwo ticketsDetails →	LAS 23:59 → ORD 05:40UA 726	2h 20m Chicago	ORD 08:00 → SDF 10:35 +1AA 4704 · flown by Republic	7h 37m	100%	93%
Frontier + Americantwo ticketsDetails →	LAS 00:59 → DFW 05:43F9 1650	3h 48m Dallas-Fort Worth	DFW 09:31 → SDF 12:48AA 3791 · flown by Envoy	8h 49m	98%	89%
Southwest Details →	LAS 22:50 → MCO 06:25WN 4590	1h 35m Orlando	MCO 08:00 → SDF 10:10 +1WN 872	8h 20m	98%	88%
United Details →	LAS 05:30 → DEN 08:32UA 596	1h 13m Denver	DEN 09:45 → SDF 14:28UA 1479	5h 58m	99%	88%
American Details →	LAS 00:59 → DFW 05:44AA 2921	1h 41m Dallas-Fort Worth	DFW 07:25 → SDF 10:39AA 3788 · flown by Envoy	6h 40m	95%	87%
Southwest + Deltatwo ticketsDetails →	LAS 22:50 → ATL 05:45WN 2179	3h 25m Atlanta	ATL 09:10 → SDF 10:29 +1DL 1374	8h 42m	98%	87%
Delta Details →	LAS 22:00 → ATL 05:00DL 879	2h 35m Atlanta	ATL 07:35 → SDF 08:54 +1DL 1523	7h 54m	98%	86%
Tight connection: often missed
United Details →	LAS 14:25 → ORD 20:23UA 706	1h 02m Chicago	ORD 21:25 → SDF 23:59UA 3659 · flown by Republic	6h 34m	70%	45%
American Details →	LAS 11:44 → PHL 19:46AA 3160	52m Philadelphia	PHL 20:38 → SDF 23:03AA 4466 · flown by Republic	8h 19m	44%	36%

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

DEN · 1h 13m · leaves 05:30 1%

MDW · 1h 00m · leaves 06:10 4%

DFW · 1h 14m · leaves 06:00 9%

Afternoon and evening

ATL · 1h 05m · leaves 14:45 18%

DFW · 1h 07m · leaves 14:02 23%

ORD · 1h 02m · leaves 14:25 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