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 87% on time.

Nonstops


Delta	TUS	SEA	3h 30m	88%	0.5%	365	Flying now
Alaska	TUS	SEA	3h 26m	86%	0.7%	700	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Seattle on time. Total trip = scheduled departure to arrival, layover included. Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	TUS 16:30 → SLC 19:30DL 3737 · flown by SkyWest	3h 15m Salt Lake City	SLC 22:45 → SEA 23:59DL 2998	7h 29m	100%	91%
Delta Details →	TUS 06:20 → LAX 08:04DL 3502 · flown by SkyWest	1h 36m Los Angeles	LAX 09:40 → SEA 12:30DL 1714	6h 14m	98%	90%
Delta Details →	TUS 07:05 → SLC 10:11DL 3745 · flown by SkyWest	1h 24m Salt Lake City	SLC 11:35 → SEA 12:52DL 2995	5h 47m	99%	87%
United Details →	TUS 05:45 → DEN 08:38UA 2418	2h 44m Denver	DEN 11:22 → SEA 13:22UA 1424	7h 37m	100%	86%
American Details →	TUS 13:41 → PHX 14:43AA 4935 · flown by SkyWest	3h 12m Phoenix	PHX 17:55 → SEA 21:05AA 4307 · flown by Envoy	7h 24m	100%	84%
American Details →	TUS 07:04 → PHX 08:05AA 4900 · flown by SkyWest	3h 27m Phoenix	PHX 11:32 → SEA 14:49AA 3440 · flown by Envoy	7h 42m	97%	84%
Delta Details →	TUS 12:27 → LAX 14:15DL 3744 · flown by SkyWest	3h 30m Los Angeles	LAX 17:45 → SEA 20:34DL 2640	8h 07m	100%	82%
American Details →	TUS 10:13 → PHX 11:14AA 6367 · flown by SkyWest	3h 21m Phoenix	PHX 14:35 → SEA 17:44AA 4035 · flown by Envoy	7h 31m	97%	81%
Tight connection: often missed
Southwest Details →	TUS 15:00 → DEN 17:55WN 1599	1h 55m Denver	DEN 19:50 → SEA 21:50WN 1716	6h 50m	70%	23%

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

DEN · 1h 03m · leaves 06:12 4%

DFW · 1h 20m · leaves 05:01 6%

Afternoon and evening

SLC · 1h 14m · leaves 16:30 21%

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.


Southwest WN 1467 TUS 07:15 → PHX Delta DL 2419 PHX 12:05 → SEA Connection details →	4h 00m	8h 03m	100%	93%
American AA 2622 TUS 05:45 → PHX Delta DL 2374 PHX 09:20 → SEA Connection details →	2h 44m	6h 50m	100%	90%
Southwest WN 860 TUS 06:45 → LAS Delta DL 2922 LAS 10:59 → SEA Connection details →	2h 59m	7h 06m	100%	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