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 8% of the time at 8 am and 42% of the time at 6 pm.

Nonstops (seasonal or thin)


Southwest	MCI	SAN	3h 30m	76%	0.3%	385	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Diego on time. Total trip = scheduled departure to arrival, layover included (San Diego is 2 h behind Kansas City). Layovers up to 4 hours. Pick a connection for the details.


United Details →	MCI 11:33 → DEN 12:38UA 5358 · flown by SkyWest	3h 17m Denver	DEN 15:55 → SAN 17:20UA 1281	7h 47m	100%	85%
United Details →	MCI 09:10 → DEN 10:17UA 280	3h 13m Denver	DEN 13:30 → SAN 14:55UA 1302	7h 45m	99%	85%
Delta Details →	MCI 05:38 → ATL 08:44DL 1204	3h 09m Atlanta	ATL 11:53 → SAN 13:21DL 540	9h 43m	100%	84%
Southwest Details →	MCI 05:55 → DEN 06:45WN 2545	1h 30m Denver	DEN 08:15 → SAN 09:40WN 1699	5h 45m	97%	83%
Southwest + Unitedtwo ticketsDetails →	MCI 06:55 → DEN 07:45WN 2546	3h 30m Denver	DEN 11:15 → SAN 12:41UA 1940	7h 46m	100%	82%
United Details →	MCI 06:16 → IAH 08:25UA 740	3h 35m Houston	IAH 12:00 → SAN 13:21UA 2399	9h 05m	98%	81%
Delta Details →	MCI 18:00 → SLC 19:47DL 2903	3h 08m Salt Lake City	SLC 22:55 → SAN 23:50DL 1202	7h 53m	99%	81%
Southwest + Unitedtwo ticketsDetails →	MCI 05:30 → LAX 06:55WN 4827	2h 05m Los Angeles	LAX 09:00 → SAN 10:08UA 4643 · flown by SkyWest	6h 38m	93%	81%
Tight connection: often missed
American Details →	MCI 19:53 → DFW 21:41AA 2047	1h 14m Dallas-Fort Worth	DFW 22:55 → SAN 23:59AA 2568	6h 06m	67%	33%
Southwest Details →	MCI 17:30 → BNA 19:05WN 4269	1h 15m Nashville	BNA 20:20 → SAN 22:25WN 1978	7h 00m	54%	22%
United Details →	MCI 19:59 → SFO 21:50UA 1429	52m San Francisco	SFO 22:42 → SAN 00:31 +1UA 2142	6h 32m	19%	14%

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

PHX · 1h 20m · leaves 05:50 0%

CLT · 1h 15m · leaves 06:31 3%

DEN · 1h 14m · leaves 08:30 5%

Afternoon and evening

DEN · 55m · leaves 17:24 42%

BNA · 1h 15m · leaves 17:30 46%

SFO · 52m · leaves 19:59 81%

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