Carrier route record

OOSLC→OAK

SkyWest Airlines · Salt Lake City to Oakland

Flights: 1,074
Period: July 2025 to June 2026
Share of route: 64%
Carriers: 2

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.

SkyWest on SLC to OAK earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 1,074 flights, with a median arrival 8 minutes early.

Set against the rest of the country, SkyWest's SLC to OAK record is 15 points better than the US average of 77.6%. That gap is worth roughly 148 fewer late arrivals for every thousand flights.

On time

92.4%

Arrivals under 15 minutes late, of 1,071 completed flights

Avg delay

53 min

Across delayed arrivals only, not all flights

Cancelled

0.19%

National rate is 1.81%

Whole route

90.2%

Every carrier on SLC to OAK, 1,670 flights

These figures cover 1,074 flights between July 2025 and June 2026. The median arrival is 8 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Carrier by carrier

SkyWest against every carrier on SLC to OAK

SkyWest flew 1,074 of the 1,670 flights on SLC to OAK, most of the route. Its 92.4% on time is 2 points better than the route as a whole, which runs 90.2%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 92.4% to Southwest at 86.2%.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on SLC to OAK
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	1,074	92.4%	53 min	0.19%	A+
Southwest Airlines	596	86.2%	52 min	0.17%	A+

Flight by flight

SkyWest flight numbers on SLC to OAK

Departure window

When SkyWest runs best on this route

Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 1,074 flights.

5am–8am—
8am–11am310 flights92.5%
11am–2pm55 flights94.5%
2pm–5pm344 flights91.6%
5pm–8pm1 flights—
8pm–5am364 flights92.8%

Scale runs 85% to 100%. Rows with fewer than 30 flights show a dash.

The time of day barely matters here. The 11am–2pm window tops the set at 94.5% and 2pm–5pm sits at 91.6%, 3 points apart across 1,074 flights. Pick the departure that suits the trip: whatever is going wrong here is not accumulating over the course of the day. The 8pm–5am window is the busiest, with 364 flights scheduled in it.

Across the year

SkyWest on SLC to OAK through the year

Darker means more delays. Figures are on-time percentages.September best, February worst

February is the weak month at 82.1% on time, against 96.7% in September. Winter delays cluster: a single storm system can account for most of a month's shortfall, so an average December hides both very good weeks and genuinely unflyable days. May was the busiest month here, with 93 flights.

Across the week, Tuesday is the strongest day at 95.6% on time and Wednesday the weakest at 89.6%. 6 points is a smaller lever than departure hour, but it is free.

Delay causes

Why SkyWest runs late on this route

One category carries most of the weight here. Carrier accounts for 77% of the 4,317 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
77%
Extreme weather
16%
National Airspace System
8%
Security
0%

Extreme weather accounts for 16% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the monthly strip above is the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.5 times the usual weather exposure. The split is drawn from 4,317 reported delay minutes.

The largest share of delay minutes, 77%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,304 of the 4,317 delay minutes reported here.

Cancellations are rare at 0.19%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and stage length

What a delay here costs

Badly late arrivals are rare here: only 2.1% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 588 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The return leg runs 94.5% on time across 1,074 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 1,074 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking SkyWest on SLC to OAK

Put together: treat all of this as provisional. 1,074 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 92.4% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,071 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures