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 → SAT flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	MCI	SAT	2h 05m	81%	0.0%	270	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Southwest Details →	MCI 05:50 → PHX 06:35WN 2578	1h 20m Phoenix	PHX 07:55 → SAT 12:05WN 4081	6h 15m	100%	96%
Southwest + Unitedtwo ticketsDetails →	MCI 05:55 → DEN 06:45WN 2545	2h 50m Denver	DEN 09:35 → SAT 12:43UA 2625	6h 48m	97%	89%
United Details →	MCI 11:33 → DEN 12:38UA 5358 · flown by SkyWest	1h 06m Denver	DEN 13:44 → SAT 16:55UA 1022	5h 22m	97%	87%
United Details →	MCI 06:16 → IAH 08:25UA 740	1h 14m Houston	IAH 09:39 → SAT 10:46UA 6201 · flown by Mesa	4h 30m	95%	84%
American + Unitedtwo ticketsDetails →	MCI 05:30 → ORD 07:31AA 3845 · flown by Envoy	1h 54m Chicago	ORD 09:25 → SAT 12:29UA 490	6h 59m	97%	82%
Southwest Details →	MCI 08:18 → LAS 09:18WN 1149	1h 02m Las Vegas	LAS 10:20 → SAT 15:00WN 2333	6h 42m	96%	82%
Delta Details →	MCI 07:32 → LAX 09:00DL 1354	55m Los Angeles	LAX 09:55 → SAT 14:52DL 2568	7h 20m	94%	82%
Delta Details →	MCI 07:00 → ATL 10:04DL 1212	2h 11m Atlanta	ATL 12:15 → SAT 13:38DL 1408	6h 41m	98%	82%
Tight connection: often missed
Frontier Details →	MCI 13:45 → DEN 14:50F9 3375	50m Denver	DEN 15:40 → SAT 18:56F9 2356	5h 11m	72%	59%
American Details →	MCI 19:53 → DFW 21:41AA 2047	1h 09m Dallas-Fort Worth	DFW 22:50 → SAT 23:58AA 1599	4h 05m	65%	23%
Southwest Details →	MCI 18:15 → SAN 19:35WN 4457	50m San Diego	SAN 20:25 → SAT 01:12 +1WN 3530	7h 00m	39%	11%

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%

LAS · 1h 02m · leaves 08:18 4%

IAH · 1h 14m · leaves 06:16 5%

Afternoon and evening

LAS · 1h 00m · leaves 17:25 60%

SAN · 50m · leaves 18:15 61%

DAL · 50m · leaves 19:25 68%

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