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 1 time in 10 at 11 am and 43% of the time at 4 pm.

Nonstops


United	DEN	SAT	2h 15m	84%	0.2%	1,222	Flying now
Frontier	DEN	SAT	2h 17m	81%	0.3%	385	Flying now
Southwest	DEN	SAT	2h 10m	72%	0.3%	1,436	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	DEN 23:55 → MCO 05:40WN 1597	1h 40m Orlando	MCO 07:20 → SAT 09:05 +1WN 4310	8h 10m	100%	98%
Southwest Details →	DEN 06:32 → SAN 07:58WN 4331	52m San Diego	SAN 08:50 → SAT 13:40WN 2499	6h 08m	98%	88%
United Details →	DEN 05:00 → IAH 08:32UA 320	1h 07m Houston	IAH 09:39 → SAT 10:46UA 6201 · flown by Mesa	4h 46m	98%	86%
Southwest Details →	DEN 07:40 → LAS 08:35WN 1559	1h 45m Las Vegas	LAS 10:20 → SAT 15:00WN 2333	6h 20m	98%	84%
United Details →	DEN 10:07 → IAH 13:40UA 1129	2h 55m Houston	IAH 16:35 → SAT 17:44UA 5379 · flown by SkyWest	6h 37m	100%	83%
American Details →	DEN 23:59 → CLT 05:13AA 3156	1h 52m Charlotte	CLT 07:05 → SAT 09:02 +1AA 2487	8h 03m	96%	81%
Southwest Details →	DEN 05:55 → MDW 09:20WN 1598	1h 15m Chicago	MDW 10:35 → SAT 13:15WN 2570	6h 20m	100%	81%
Delta Details →	DEN 05:45 → ATL 10:42DL 341	1h 33m Atlanta	ATL 12:15 → SAT 13:38DL 1408	6h 56m	97%	81%
Tight connection: often missed
United Details →	DEN 15:35 → IAH 19:10UA 489	55m Houston	IAH 20:05 → SAT 21:13UA 1542	4h 38m	72%	56%
Delta Details →	DEN 13:15 → ATL 18:18DL 824	51m Atlanta	ATL 19:09 → SAT 20:41DL 2893	6h 26m	66%	48%
American Details →	DEN 12:39 → DFW 15:46AA 2359	51m Dallas-Fort Worth	DFW 16:37 → SAT 17:49AA 2374	4h 10m	57%	28%

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 15m · leaves 05:55 0%

IAH · 1h 07m · leaves 05:00 2%

SAN · 52m · leaves 06:32 2%

Afternoon and evening

LAS · 55m · leaves 17:30 57%

PHX · 1h 15m · leaves 18:55 59%

DAL · 55m · leaves 15:55 69%

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 1093 DEN 06:04 → LAX American AA 6307 LAX 09:28 → SAT Connection details →	1h 54m	7h 32m	99%	92%
United UA 1686 DEN 11:25 → PHX Southwest WN 1230 PHX 16:05 → SAT Connection details →	3h 40m	7h 50m	100%	87%
United UA 526 DEN 11:22 → LAS Frontier F9 3418 LAS 15:24 → SAT Connection details →	3h 00m	7h 53m	99%	82%

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