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 3% of the time at 9 am and 23% of the time at 4 pm.

Nonstops


Delta	SLC	MCI	2h 26m	86%	1.0%	1,009	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Kansas City on time. Total trip = scheduled departure to arrival, layover included (Kansas City is 1 h ahead of Salt Lake City). Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	SLC 06:25 → LAS 06:50WN 4205	3h 15m Las Vegas	LAS 10:05 → MCI 14:55WN 786	7h 30m	100%	100%
Southwest Details →	SLC 05:42 → DEN 07:08WN 3737	2h 52m Denver	DEN 10:00 → MCI 12:45WN 3114	6h 03m	100%	96%
United Details →	SLC 05:15 → DEN 06:54UA 5683 · flown by SkyWest	1h 06m Denver	DEN 08:00 → MCI 10:50UA 5247 · flown by SkyWest	4h 35m	96%	90%
Southwest Details →	SLC 07:45 → DEN 09:15WN 3738	3h 15m Denver	DEN 12:30 → MCI 15:05WN 351	6h 20m	100%	88%
Delta Details →	SLC 08:00 → MSP 11:32DL 2916	3h 48m Minneapolis	MSP 15:20 → MCI 16:47DL 1630	7h 48m	99%	86%
United Details →	SLC 08:30 → DEN 10:27UA 5642 · flown by SkyWest	3h 13m Denver	DEN 13:40 → MCI 16:22UA 586	6h 52m	98%	86%
Frontier Details →	SLC 06:05 → DEN 07:43F9 3220	2h 33m Denver	DEN 10:16 → MCI 13:00F9 4828	5h 55m	96%	86%
Alaska Details →	SLC 08:20 → PDX 09:26AS 3004 · flown by SkyWest	2h 04m Portland	PDX 11:30 → MCI 16:53AS 1525	7h 33m	100%	85%
Tight connection: often missed
United Details →	SLC 17:57 → DEN 19:40UA 1910	1h 00m Denver	DEN 20:40 → MCI 23:25UA 1596	4h 28m	70%	47%
American Details →	SLC 17:01 → ORD 21:29AA 2596	1h 31m Chicago	ORD 23:00 → MCI 00:48 +1AA 6215 · flown by SkyWest	6h 47m	72%	35%
Southwest Details →	SLC 16:45 → DEN 18:15WN 3740	1h 20m Denver	DEN 19:35 → MCI 22:15WN 1589	4h 32m	54%	19%

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

MDW · 1h 10m · leaves 06:55 0%

DEN · 1h 08m · leaves 07:00 3%

DFW · 1h 14m · leaves 05:00 4%

Afternoon and evening

ATL · 1h 00m · leaves 11:00 16%

SEA · 1h 00m · leaves 15:14 23%

DEN · 1h 20m · leaves 16:45 46%

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 5683 SLC 05:15 → DEN Southwest WN 3114 DEN 10:00 → MCI Connection details →	3h 06m	6h 30m	98%	96%
Southwest WN 3737 SLC 05:42 → DEN Frontier F9 4828 DEN 10:16 → MCI Connection details →	3h 08m	6h 18m	100%	88%
Delta DL 1317 SLC 07:45 → DEN Southwest WN 351 DEN 12:30 → MCI Connection details →	3h 12m	6h 20m	99%	87%

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