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

No clear winner: airlines and hours on this route all land within a few points of 93% on time.

Nonstops


Delta	TUS	SLC	2h 01m	93%	0.2%	1,087	Flying now
Frontier	TUS	SLC	2h 00m	87%few flights	4.0%	25	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


American Details →	TUS 05:45 → PHX 06:36AA 2622	2h 03m Phoenix	PHX 08:39 → SLC 11:37AA 6422 · flown by SkyWest	4h 52m	100%	91%
Delta Details →	TUS 06:20 → LAX 08:04DL 3502 · flown by SkyWest	1h 51m Los Angeles	LAX 09:55 → SLC 12:50DL 1434	5h 30m	98%	89%
United Details →	TUS 05:45 → DEN 08:38UA 2418	3h 02m Denver	DEN 11:40 → SLC 13:13UA 1963	6h 28m	100%	79%
Delta Details →	TUS 12:27 → LAX 14:15DL 3744 · flown by SkyWest	2h 50m Los Angeles	LAX 17:05 → SLC 19:59DL 2311	6h 32m	100%	78%
Southwest Details →	TUS 06:12 → DEN 09:02WN 4059	1h 03m Denver	DEN 10:05 → SLC 11:45WN 4027	4h 28m	96%	77%
Alaska Details →	TUS 14:29 → SEA 17:44AS 641	1h 23m Seattle	SEA 19:07 → SLC 22:14AS 3298 · flown by SkyWest	6h 45m	94%	74%
Southwest Details →	TUS 10:45 → LAS 12:05WN 1097	1h 43m Las Vegas	LAS 13:48 → SLC 16:15WN 3310	4h 33m	100%	70%
Alaska Details →	TUS 07:10 → SEA 10:37AS 3361 · flown by SkyWest	1h 14m Seattle	SEA 11:51 → SLC 15:04AS 733	6h 54m	96%	66%
Tight connection: often missed
American Details →	TUS 13:18 → DFW 17:50AA 2926	58m Dallas-Fort Worth	DFW 18:48 → SLC 20:34AA 558	6h 16m	71%	33%
Southwest Details →	TUS 20:00 → LAS 21:25WN 1195	1h 37m Las Vegas	LAS 23:02 → SLC 01:28 +1WN 1454	4h 27m	73%	20%

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

SEA · 1h 14m · leaves 07:10 4%

DEN · 1h 03m · leaves 06:12 4%

Afternoon and evening

DEN · 1h 06m · leaves 13:30 16%

PHX · 51m · leaves 18:30 19%

DFW · 58m · leaves 13:18 29%

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.


American AA 2622 TUS 05:45 → PHX Delta DL 1447 PHX 09:45 → SLC Connection details →	3h 09m	5h 38m	100%	93%
Southwest WN 2310 TUS 05:45 → SAN Alaska AS 3122 SAN 08:55 → SLC Connection details →	1h 50m	5h 24m	98%	92%
American AA 6393 TUS 06:02 → LAX Delta DL 1194 LAX 11:41 → SLC Connection details →	3h 55m	7h 32m	99%	89%

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