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 PHX → GJT flights land within a few points of 82% on time whatever the hour.

Nonstops (seasonal or thin)


American	PHX	GJT	1h 34m	82%	0.3%	982	Flying now

Best connections, any airlines

Most reliable Quickest (80%+ on time)

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


Southwest + Deltatwo ticketsDetails →	PHX 11:40 → SLC 14:10WN 147	3h 00m Salt Lake City	SLC 17:10 → GJT 18:15DL 4246 · flown by SkyWest	5h 35m	100%	92%
Delta Details →	PHX 17:05 → SLC 19:43DL 1738	1h 07m Salt Lake City	SLC 20:50 → GJT 21:54DL 4234 · flown by SkyWest	3h 49m	90%	87%
Southwest + Unitedtwo ticketsDetails →	PHX 06:15 → DEN 09:00WN 1706	2h 24m Denver	DEN 11:24 → GJT 12:31UA 1714	5h 16m	100%	86%
Frontier + Unitedtwo ticketsDetails →	PHX 06:40 → DEN 09:37F9 1376	3h 48m Denver	DEN 13:25 → GJT 14:40UA 5488 · flown by SkyWest	7h 00m	99%	82%
Southwest + Unitedtwo ticketsDetails →	PHX 05:15 → DEN 08:00WN 3259	1h 35m Denver	DEN 09:35 → GJT 10:44UA 4704 · flown by SkyWest	4h 29m	96%	82%
American Details →	PHX 08:30 → DFW 13:05AA 2719	1h 54m Dallas-Fort Worth	DFW 14:59 → GJT 16:25AA 4996 · flown by SkyWest	6h 54m	96%	72%
Southwest + Unitedtwo ticketsDetails →	PHX 11:25 → DEN 14:10WN 681	2h 10m Denver	DEN 16:20 → GJT 17:33UA 4770 · flown by SkyWest	5h 08m	100%	70%
United Details →	PHX 16:25 → DEN 19:21UA 624	1h 34m Denver	DEN 20:55 → GJT 22:11UA 5240 · flown by SkyWest	4h 46m	88%	69%

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 · 1h 07m · leaves 17:05 10%

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