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

No clear winner: American’s GJT → PHX flights land within a few points of 83% on time whatever the hour.

Nonstops (seasonal or thin)


American	GJT	PHX	1h 46m	83%	0.5%	983	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Delta Details →	GJT 18:50 → SLC 20:00DL 4246 · flown by SkyWest	2h 45m Salt Lake City	SLC 22:45 → PHX 23:31DL 1496	5h 41m	99%	87%
Delta + Americantwo ticketsDetails →	GJT 07:34 → SLC 08:45DL 4230 · flown by SkyWest	3h 30m Salt Lake City	SLC 12:15 → PHX 13:02AA 6422 · flown by SkyWest	6h 26m	99%	86%
United Details →	GJT 07:00 → DEN 08:22UA 1877	3h 03m Denver	DEN 11:25 → PHX 12:25UA 1686	6h 25m	99%	86%
United + Frontiertwo ticketsDetails →	GJT 05:30 → DEN 07:00UA 4800 · flown by SkyWest	2h 15m Denver	DEN 09:15 → PHX 10:11F9 2141	5h 46m	92%	80%
United Details →	GJT 11:19 → DEN 12:45UA 4709 · flown by SkyWest	2h 50m Denver	DEN 15:35 → PHX 16:35UA 1254	6h 16m	98%	78%
American Details →	GJT 06:26 → DFW 09:50AA 6414 · flown by SkyWest	2h 43m Dallas-Fort Worth	DFW 12:33 → PHX 13:00AA 1685	7h 34m	99%	71%
United Details →	GJT 15:15 → DEN 16:45UA 4635 · flown by SkyWest	2h 47m Denver	DEN 19:32 → PHX 20:32UA 1729	6h 17m	93%	69%
United + Southwesttwo ticketsDetails →	GJT 09:28 → DEN 10:57UA 4690 · flown by SkyWest	3h 23m Denver	DEN 14:20 → PHX 15:20WN 1681	6h 47m	100%	67%
Tight connection: often missed
American Details →	GJT 16:55 → DFW 20:19AA 4996 · flown by SkyWest	1h 10m Dallas-Fort Worth	DFW 21:29 → PHX 22:06AA 3239	6h 12m	58%	33%

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 · 1h 00m · leaves 06:26 11%

DEN · 1h 00m · leaves 05:30 14%

Afternoon and evening

DEN · 1h 20m · leaves 18:10 22%

DFW · 1h 10m · leaves 16:55 42%

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.

The table above includes two-ticket connections (marked “two tickets”), held to the 90-minute minimum. One ticket only →

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