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 9 in 10 on time.

Nonstops


Delta	OAK	SLC	1h 56m	94%	0.2%	1,074	Flying now
Southwest	OAK	SLC	1h 45m	79%	0.0%	569	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 Oakland). Layovers up to 4 hours. Pick a connection for the details.


Alaska Details →	OAK 07:52 → PDX 09:29AS 2298 · flown by Horizon	1h 26m Portland	PDX 10:55 → SLC 13:59AS 3112 · flown by SkyWest	5h 07m	98%	90%
Alaska Details →	OAK 12:01 → PDX 13:44AS 3045 · flown by SkyWest	46m Portland	PDX 14:30 → SLC 17:29AS 3120 · flown by SkyWest	4h 28m	93%	89%
Southwest Details →	OAK 05:00 → LAS 06:30WN 2325	1h 05m Las Vegas	LAS 07:35 → SLC 10:00WN 2957	4h 00m	98%	89%
Alaska Details →	OAK 10:37 → SAN 12:13AS 3313 · flown by SkyWest	3h 41m San Diego	SAN 15:54 → SLC 19:02AS 3488 · flown by SkyWest	7h 25m	100%	81%
Alaska Details →	OAK 14:55 → SEA 17:00AS 1464	2h 07m Seattle	SEA 19:07 → SLC 22:14AS 3298 · flown by SkyWest	6h 19m	90%	72%
Alaska Details →	OAK 14:50 → SAN 16:26AS 3311 · flown by SkyWest	2h 23m San Diego	SAN 18:49 → SLC 21:57AS 3017 · flown by SkyWest	6h 07m	96%	70%
Southwest Details →	OAK 09:00 → LAS 10:30WN 2374	3h 18m Las Vegas	LAS 13:48 → SLC 16:15WN 3310	6h 18m	100%	70%
Alaska Details →	OAK 06:22 → SEA 08:26AS 491	3h 25m Seattle	SEA 11:51 → SLC 15:04AS 733	7h 42m	100%	68%
Tight connection: often missed
Southwest Details →	OAK 13:25 → DEN 16:50WN 3043	1h 00m Denver	DEN 17:50 → SLC 19:35WN 1734	5h 10m	39%	18%
Southwest Details →	OAK 19:50 → PHX 21:50WN 3070	1h 00m Phoenix	PHX 22:50 → SLC 01:28 +1WN 849	4h 38m	40%	16%
Southwest Details →	OAK 20:15 → LAS 21:52WN 5051	1h 10m Las Vegas	LAS 23:02 → SLC 01:28 +1WN 1454	4h 12m	48%	12%

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 20m · leaves 08:20 0%

LAS · 1h 05m · leaves 05:00 3%

Afternoon and evening

PHX · 1h 00m · leaves 19:50 60%

DEN · 1h 00m · leaves 13:25 61%

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 4421 OAK 06:02 → ONT Delta DL 1302 ONT 09:40 → SLC Connection details →	2h 12m	5h 26m	100%	97%
Southwest WN 3073 OAK 06:20 → SAN Delta DL 1177 SAN 09:47 → SLC Connection details →	1h 52m	5h 30m	100%	93%
Southwest WN 3066 OAK 05:10 → PHX Delta DL 1447 PHX 09:45 → SLC Connection details →	2h 40m	6h 13m	98%	91%

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