Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

No clear winner: Delta’s SLC → COS flights land within a few points of 93% on time whatever the hour.

Nonstops (seasonal or thin)


Delta	SLC	COS	1h 40m	93%	0.1%	721	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. Layovers up to 4 hours. Pick a connection for the details.


Southwest Details →	SLC 05:42 → DEN 07:08WN 3737	52m Denver	DEN 08:00 → COS 08:55WN 3419	3h 13m	95%	91%
Southwest Details →	SLC 06:25 → LAS 06:50WN 4205	2h 00m Las Vegas	LAS 08:50 → COS 11:45WN 4326	5h 20m	100%	90%
United Details →	SLC 17:57 → DEN 19:40UA 1910	3h 29m Denver	DEN 23:09 → COS 23:59UA 4745 · flown by SkyWest	6h 02m	97%	84%
United Details →	SLC 14:28 → DEN 16:11UA 1662	3h 39m Denver	DEN 19:50 → COS 20:46UA 5669 · flown by SkyWest	6h 18m	98%	82%
United Details →	SLC 05:15 → DEN 06:54UA 5683 · flown by SkyWest	2h 51m Denver	DEN 09:45 → COS 10:46UA 5306 · flown by SkyWest	5h 31m	99%	80%
United Details →	SLC 10:39 → DEN 12:24UA 2004	3h 11m Denver	DEN 15:35 → COS 16:32UA 5546 · flown by SkyWest	5h 53m	100%	78%
United Details →	SLC 07:00 → DEN 08:42UA 1232	2h 50m Denver	DEN 11:32 → COS 12:23UA 1111	5h 23m	99%	74%
United Details →	SLC 08:30 → DEN 10:27UA 5642 · flown by SkyWest	3h 03m Denver	DEN 13:30 → COS 14:27UA 4775 · flown by SkyWest	5h 57m	98%	72%
Tight connection: often missed
Southwest Details →	SLC 09:55 → HOU 14:00WN 452	1h 02m Houston	HOU 15:02 → COS 16:22WN 4385	6h 27m	71%	38%
American Details →	SLC 16:42 → DFW 20:30AA 2594	55m Dallas-Fort Worth	DFW 21:25 → COS 22:23AA 790	5h 41m	36%	17%
United Details →	SLC 17:57 → DEN 19:40UA 1910	50m Denver	DEN 20:30 → COS 21:26UA 4744 · flown by SkyWest	3h 29m	59%	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.

Morning

DEN · 1h 03m · leaves 07:00 4%

PHX · 50m · leaves 06:15 16%

Afternoon and evening

DEN · 50m · leaves 17:57 41%

DFW · 55m · leaves 16:42 64%

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 1586 SLC 18:30 → DEN United UA 4745 DEN 23:09 → COS Connection details →	3h 07m	5h 29m	93%	80%
Southwest WN 3737 SLC 05:42 → DEN United UA 5306 DEN 09:45 → COS Connection details →	2h 37m	5h 04m	100%	80%
Southwest WN 3739 SLC 10:40 → DEN United UA 5546 DEN 15:35 → COS Connection details →	3h 30m	5h 52m	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