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 75-minute layover misses 3% of the time at 10 am and 1 time in 4 at 4 pm.

Nonstops


Southwest	STL	MCI	1h 10m	77%	0.3%	1,020	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. Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	STL 05:45 → DEN 07:00WN 3909	3h 00m Denver	DEN 10:00 → MCI 12:45WN 3114	7h 00m	100%	98%
Southwest Details →	STL 05:40 → MDW 06:45WN 1008	1h 15m Chicago	MDW 08:00 → MCI 09:30WN 2808	3h 50m	96%	95%
United Details →	STL 05:10 → DEN 06:32UA 362	1h 28m Denver	DEN 08:00 → MCI 10:50UA 5247 · flown by SkyWest	5h 40m	97%	89%
Southwest Details →	STL 05:05 → DAL 06:45WN 1396	1h 50m Dallas	DAL 08:35 → MCI 10:10WN 1343	5h 05m	95%	88%
Southwest Details →	STL 08:42 → DEN 10:02WN 3910	2h 28m Denver	DEN 12:30 → MCI 15:05WN 351	6h 23m	100%	88%
Delta Details →	STL 08:49 → MSP 10:30DL 5325 · flown by Endeavor	3h 15m Minneapolis	MSP 13:45 → MCI 15:14DL 1613	6h 25m	99%	87%
United Details →	STL 09:06 → DEN 10:30UA 2459	3h 10m Denver	DEN 13:40 → MCI 16:22UA 586	7h 16m	99%	87%
Delta Details →	STL 07:08 → ATL 09:45DL 1536	3h 39m Atlanta	ATL 13:24 → MCI 14:32DL 1443	7h 24m	99%	86%
Tight connection: often missed
United Details →	STL 12:55 → IAD 16:07UA 4454 · flown by GoJet	1h 08m Dulles	IAD 17:15 → MCI 19:03UA 2057	6h 08m	74%	56%
American Details →	STL 17:13 → DFW 19:15AA 2712	1h 04m Dallas-Fort Worth	DFW 20:19 → MCI 21:57AA 2267	4h 44m	36%	18%
Southwest Details →	STL 18:40 → DEN 20:00WN 3913	48m Denver	DEN 20:48 → MCI 23:30WN 4758	4h 50m	30%	10%

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

ATL · 1h 20m · leaves 07:08 3%

MDW · 1h 15m · leaves 05:40 4%

IAH · 1h 13m · leaves 08:35 7%

Afternoon and evening

ORD · 50m · leaves 20:14 45%

DFW · 1h 04m · leaves 17:13 64%

DEN · 48m · leaves 18:40 70%

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.


Southwest WN 3909 STL 05:45 → DEN Frontier F9 4828 DEN 10:16 → MCI Connection details →	3h 16m	7h 15m	100%	90%
Southwest WN 3961 STL 08:15 → MSP Delta DL 1613 MSP 13:45 → MCI Connection details →	4h 00m	6h 59m	97%	86%
Delta DL 1524 STL 06:00 → ATL Southwest WN 3931 ATL 10:55 → MCI Connection details →	2h 17m	6h 00m	99%	83%

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