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

No clear winner: United’s GJT → DEN flights land within a few points of 4 in 5 on time whatever the hour.

Nonstops


United	GJT	DEN	1h 22m	79%	1.2%	2,256	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. Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	GJT 07:34 → SLC 08:45DL 4230 · flown by SkyWest	1h 30m Salt Lake City	SLC 10:15 → DEN 11:53DL 1553	4h 19m	98%	82%
Delta Details →	GJT 18:50 → SLC 20:00DL 4246 · flown by SkyWest	1h 05m Salt Lake City	SLC 21:05 → DEN 22:40DL 1667	3h 50m	94%	75%
American Details →	GJT 12:05 → PHX 12:46AA 4995 · flown by SkyWest	2h 38m Phoenix	PHX 15:24 → DEN 18:16AA 1638	6h 11m	99%	69%
American Details →	GJT 06:26 → DFW 09:50AA 6414 · flown by SkyWest	51m Dallas-Fort Worth	DFW 10:41 → DEN 11:46AA 2359	5h 20m	87%	59%
American Details →	GJT 18:54 → PHX 19:37AA 4994 · flown by SkyWest	2h 08m Phoenix	PHX 21:45 → DEN 00:47 +1AA 3255	5h 43m	91%	55%
American Details →	GJT 10:56 → DFW 14:17AA 4918 · flown by SkyWest	1h 56m Dallas-Fort Worth	DFW 16:13 → DEN 17:19AA 1322	6h 23m	89%	41%
American Details →	GJT 16:55 → DFW 20:19AA 4996 · flown by SkyWest	2h 26m Dallas-Fort Worth	DFW 22:45 → DEN 23:55AA 662	7h 00m	86%	37%

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

DFW · 51m · leaves 06:26 13%

Afternoon and evening

SLC · 1h 05m · leaves 18:50 6%

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 4230 GJT 07:34 → SLC United UA 2004 SLC 10:39 → DEN Connection details →	1h 54m	4h 50m	98%	88%
Delta DL 4246 GJT 18:50 → SLC Frontier F9 4252 SLC 22:50 → DEN Connection details →	2h 50m	5h 48m	98%	78%
American AA 4995 GJT 12:05 → PHX United UA 624 PHX 16:25 → DEN Connection details →	3h 39m	7h 16m	99%	74%

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