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 SAN → COS flights land within a few points of 2 in 3 on time whatever the hour.

Nonstops (seasonal or thin)


Southwest	SAN	COS	2h 20m	67%	0.0%	169	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	SAN 09:47 → SLC 12:50DL 1177	3h 05m Salt Lake City	SLC 15:55 → COS 17:40DL 4449 · flown by SkyWest	6h 53m	99%	90%
United Details →	SAN 16:07 → DEN 19:39UA 682	3h 30m Denver	DEN 23:09 → COS 23:59UA 4745 · flown by SkyWest	6h 52m	99%	85%
United Details →	SAN 12:33 → DEN 16:06UA 1565	3h 44m Denver	DEN 19:50 → COS 20:46UA 5669 · flown by SkyWest	7h 13m	98%	81%
United Details →	SAN 08:45 → DEN 12:17UA 2476	3h 18m Denver	DEN 15:35 → COS 16:32UA 5546 · flown by SkyWest	6h 47m	98%	77%
Delta Details →	SAN 17:01 → SLC 20:00DL 1210	59m Salt Lake City	SLC 20:59 → COS 22:42DL 3788 · flown by SkyWest	4h 41m	82%	74%
United Details →	SAN 06:35 → DEN 10:08UA 2368	1h 24m Denver	DEN 11:32 → COS 12:23UA 1111	4h 48m	98%	72%
United Details →	SAN 10:55 → DEN 14:27UA 1715	3h 28m Denver	DEN 17:55 → COS 18:54UA 5861 · flown by SkyWest	6h 59m	100%	67%
American Details →	SAN 08:00 → DFW 13:10AA 1055	2h 27m Dallas-Fort Worth	DFW 15:37 → COS 16:43AA 4956 · flown by SkyWest	7h 43m	96%	63%
Tight connection: often missed
American Details →	SAN 11:07 → DFW 16:28AA 2476	59m Dallas-Fort Worth	DFW 17:27 → COS 18:34AA 6267 · flown by SkyWest	6h 27m	73%	46%
United Details →	SAN 16:07 → DEN 19:39UA 682	51m Denver	DEN 20:30 → COS 21:26UA 4744 · flown by SkyWest	4h 19m	67%	19%
American Details →	SAN 15:08 → DFW 20:30AA 2459	55m Dallas-Fort Worth	DFW 21:25 → COS 22:23AA 790	6h 15m	33%	16%

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.

Afternoon and evening

SLC · 59m · leaves 17:01 18%

DEN · 51m · leaves 16:07 33%

DFW · 55m · leaves 15:08 67%

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.


Alaska AS 3122 SAN 08:55 → SLC Delta DL 4449 SLC 15:55 → COS Connection details →	3h 46m	7h 45m	100%	92%
Alaska AS 3488 SAN 15:54 → SLC Delta DL 3788 SLC 20:59 → COS Connection details →	1h 57m	5h 48m	88%	80%
Southwest WN 3494 SAN 08:32 → DEN United UA 5546 DEN 15:35 → COS Connection details →	3h 40m	7h 00m	100%	79%

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