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 92% on time.

Nonstops


Delta	SLC	TUS	2h 04m	92%	0.2%	1,087	Flying now
Frontier	SLC	TUS	1h 59m	88%few flights	0.0%	25	Not flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

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


Southwest Details →	SLC 05:42 → DEN 07:08WN 3737	47m Denver	DEN 07:55 → TUS 09:00WN 446	4h 13m	93%	87%
Southwest Details →	SLC 06:25 → LAS 06:50WN 4205	50m Las Vegas	LAS 07:40 → TUS 09:00WN 519	3h 35m	95%	87%
United Details →	SLC 07:00 → DEN 08:42UA 1232	2h 48m Denver	DEN 11:30 → TUS 12:32UA 1188	6h 32m	99%	85%
Delta Details →	SLC 15:40 → LAX 16:36DL 841	2h 45m Los Angeles	LAX 19:21 → TUS 21:00DL 3846 · flown by SkyWest	6h 20m	99%	81%
Delta Details →	SLC 09:40 → LAX 10:42DL 1095	3h 30m Los Angeles	LAX 14:12 → TUS 15:50DL 3776 · flown by SkyWest	7h 10m	100%	80%
American Details →	SLC 07:13 → PHX 07:57AA 6327 · flown by SkyWest	2h 08m Phoenix	PHX 10:05 → TUS 11:07AA 6369 · flown by SkyWest	4h 54m	97%	77%
Southwest Details →	SLC 19:00 → PHX 19:40WN 3538	3h 10m Phoenix	PHX 22:50 → TUS 23:42WN 3564	5h 42m	96%	70%
Southwest Details →	SLC 11:35 → PHX 12:15WN 403	1h 10m Phoenix	PHX 13:25 → TUS 14:10WN 1599	3h 35m	84%	70%
Tight connection: often missed
Southwest Details →	SLC 20:30 → LAS 20:55WN 3745	1h 05m Las Vegas	LAS 22:00 → TUS 23:28WN 354	3h 58m	58%	31%
United Details →	SLC 09:49 → SFO 11:13UA 5970 · flown by SkyWest	1h 10m San Francisco	SFO 12:23 → TUS 14:47UA 6023 · flown by SkyWest	5h 58m	41%	30%

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

LAS · 50m · leaves 06:25 5%

DEN · 47m · leaves 05:42 7%

SFO · 1h 10m · leaves 09:49 59%

Afternoon and evening

LAX · 1h 11m · leaves 17:10 9%

LAS · 1h 05m · leaves 20:30 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.


Frontier F9 3871 SLC 12:41 → PHX American AA 4126 PHX 17:05 → TUS Connection details →	3h 40m	6h 13m	97%	85%
Southwest WN 3738 SLC 07:45 → DEN United UA 1188 DEN 11:30 → TUS Connection details →	2h 15m	5h 47m	98%	85%
Southwest WN 3746 SLC 11:20 → LAX American AA 6372 LAX 15:37 → TUS Connection details →	3h 22m	6h 50m	100%	83%

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