Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Southwest’s MCI → STL flights land within a few points of 86% on time whatever the hour.

Nonstops


Southwest	MCI	STL	1h 05m	86%	0.5%	1,020	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach St Louis on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	MCI 06:55 → DEN 07:45WN 2546	2h 20m Denver	DEN 10:05 → STL 13:20WN 1753	6h 25m	100%	96%
Southwest Details →	MCI 05:15 → MDW 06:40WN 4276	1h 10m Chicago	MDW 07:50 → STL 09:10WN 2900	3h 55m	93%	88%
Delta Details →	MCI 08:00 → ATL 11:00DL 3110	3h 09m Atlanta	ATL 14:09 → STL 14:48DL 2700	6h 50m	98%	86%
United Details →	MCI 09:10 → DEN 10:17UA 280	3h 08m Denver	DEN 13:25 → STL 16:33UA 1639	7h 23m	99%	85%
United Details →	MCI 06:00 → ORD 07:58UA 5485 · flown by SkyWest	2h 42m Chicago	ORD 10:40 → STL 12:11UA 1355	6h 11m	95%	83%
Delta Details →	MCI 07:02 → SLC 08:45DL 2897	56m Salt Lake City	SLC 09:41 → STL 13:36DL 2455	6h 34m	91%	82%
Southwest Details →	MCI 05:00 → MCO 08:45WN 2209	2h 25m Orlando	MCO 11:10 → STL 12:40WN 3316	7h 40m	98%	82%
Southwest Details →	MCI 05:50 → PHX 06:35WN 2578	1h 27m Phoenix	PHX 08:02 → STL 13:00WN 1467	7h 10m	100%	82%
Tight connection: often missed
American Details →	MCI 17:21 → PHL 21:10AA 2875	49m Philadelphia	PHL 21:59 → STL 23:32AA 1368	6h 11m	69%	50%
American Details →	MCI 19:46 → ORD 21:38AA 6399 · flown by SkyWest	1h 22m Chicago	ORD 23:00 → STL 00:16 +1AA 1004	4h 30m	61%	29%
Southwest Details →	MCI 16:15 → DEN 17:05WN 2549	2h 10m Denver	DEN 19:15 → STL 22:28WN 1756	6h 15m	69%	26%

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 05:15 7%

CLT · 1h 00m · leaves 06:31 7%

MSP · 1h 01m · leaves 06:23 8%

Afternoon and evening

IAH · 1h 15m · leaves 14:56 11%

SLC · 1h 03m · leaves 18:00 13%

PHL · 49m · leaves 17:21 31%

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 355 MCI 06:00 → DEN Southwest WN 1753 DEN 10:05 → STL Connection details →	3h 09m	7h 20m	98%	92%
American AA 3845 MCI 05:30 → ORD United UA 1355 ORD 10:40 → STL Connection details →	3h 09m	6h 41m	97%	86%
United UA 5358 MCI 11:33 → DEN Frontier F9 3302 DEN 16:10 → STL Connection details →	3h 32m	7h 49m	100%	85%

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