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 9 am and 29% of the time at 5 pm.

Nonstops


United	SAT	DEN	2h 19m	83%	0.7%	1,223	Flying now
Southwest	SAT	DEN	2h 15m	82%	0.2%	1,434	Flying now
Frontier	SAT	DEN	2h 24m	82%	0.5%	383	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Denver on time. Total trip = scheduled departure to arrival, layover included (Denver is 1 h behind San Antonio). Layovers up to 4 hours. Pick a connection for the details.


United Details →	SAT 05:30 → IAH 06:37UA 469	1h 53m Houston	IAH 08:30 → DEN 10:05UA 2816	5h 35m	97%	93%
Southwest Details →	SAT 05:00 → MCO 08:45WN 4608	1h 00m Orlando	MCO 09:45 → DEN 11:35WN 2630	7h 35m	98%	90%
United Details →	SAT 06:40 → ORD 09:38UA 1332	1h 16m Chicago	ORD 10:54 → DEN 12:45UA 581	7h 05m	93%	89%
United Details →	SAT 19:20 → IAH 20:33UA 5658 · flown by SkyWest	1h 37m Houston	IAH 22:10 → DEN 23:57UA 1066	5h 37m	98%	88%
Delta Details →	SAT 07:40 → ATL 11:04DL 998	1h 46m Atlanta	ATL 12:50 → DEN 14:04DL 957	7h 24m	98%	86%
Southwest Details →	SAT 05:50 → LAS 06:30WN 1662	2h 25m Las Vegas	LAS 08:55 → DEN 11:50WN 247	7h 00m	96%	85%
United Details →	SAT 07:43 → IAH 08:50UA 410	3h 43m Houston	IAH 12:33 → DEN 14:17UA 2168	7h 34m	98%	84%
Delta Details →	SAT 06:40 → ATL 10:06DL 1066	1h 39m Atlanta	ATL 11:45 → DEN 12:59DL 706	7h 19m	98%	83%
Tight connection: often missed
American Details →	SAT 11:04 → DFW 12:21AA 413	56m Dallas-Fort Worth	DFW 13:17 → DEN 14:21AA 420	4h 17m	66%	48%
United Details →	SAT 16:18 → IAH 17:25UA 404	54m Houston	IAH 18:19 → DEN 20:14UA 1654	4h 56m	71%	46%
American Details →	SAT 20:23 → DFW 21:44AA 499	1h 01m Dallas-Fort Worth	DFW 22:45 → DEN 23:55AA 662	4h 32m	55%	21%

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

MCO · 1h 00m · leaves 05:00 2%

ORD · 1h 16m · leaves 06:40 7%

ATL · 57m · leaves 05:25 8%

Afternoon and evening

IAH · 54m · leaves 16:18 29%

DFW · 1h 01m · leaves 20:23 45%

LAS · 55m · leaves 14:40 45%

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.


Delta DL 2717 SAT 06:05 → MSP United UA 2232 MSP 11:34 → DEN Connection details →	2h 34m	7h 40m	98%	90%
Southwest WN 1662 SAT 05:50 → LAS United UA 1315 LAS 09:37 → DEN Connection details →	3h 07m	7h 51m	96%	89%
Delta DL 2534 SAT 07:19 → LAX United UA 2061 LAX 10:55 → DEN Connection details →	2h 35m	8h 08m	97%	88%

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