Carrier route record

OOOAK→SLC

SkyWest Airlines · Oakland to Salt Lake City

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 OAK to SLC earns an A+. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 17 points better than the national rate of 77.6%. When something does go wrong the average delay runs a little over an hour. That rests on 1,074 flights, with a median arrival 13 minutes early.

Set against the rest of the country, SkyWest's OAK to SLC record is 17 points better than the US average of 77.6%. That gap is worth roughly 169 fewer late arrivals for every thousand flights.

On time

94.5%

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

Avg delay

75 min

Across delayed arrivals only, not all flights

Cancelled

0.19%

National rate is 1.81%

Whole route

89.1%

Every carrier on OAK to SLC, 1,670 flights

These figures cover 1,074 flights between July 2025 and June 2026. The median arrival is 13 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 OAK to SLC

SkyWest flew 1,074 of the 1,670 flights on OAK to SLC, most of the route. Its 94.5% on time is 5 points better than the route as a whole, which runs 89.1%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 94.5% to Southwest at 79.5%.

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 OAK to SLC
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	1,074	94.5%	75 min	0.19%	A+
Southwest Airlines	596	79.5%	61 min	0.00%	B+

Flight by flight

SkyWest flight numbers on OAK to SLC

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–8am365 flights96.4%
8am–11am—
11am–2pm365 flights93.9%
2pm–5pm59 flights89.8%
5pm–8pm285 flights93.7%
8pm–5am—

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

The early departures do better, though not dramatically: 96.4% on time for the 5am–8am window against 89.8% for 2pm–5pm. Worth taking if the schedule allows, not worth an extra connection. The 5am–8am window is the busiest, with 365 flights scheduled in it.

Across the year

SkyWest on OAK to SLC through the year

Darker means more delays. Figures are on-time percentages.July best, March worst

Delays peak in March, when the on-time rate falls to 89.1%. July is the strongest month at 97.8%. Moving a flexible trip across that boundary buys 9 points. May was the busiest month here, with 93 flights.

Across the week, Tuesday is the strongest day at 97.5% on time and Thursday the weakest at 91.5%. 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 75% of the 4,403 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
75%
Extreme weather
22%
National Airspace System
3%

Extreme weather accounts for 22% 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 3.6 times the usual weather exposure. The split is drawn from 4,403 reported delay minutes.

The largest share of delay minutes, 75%, 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 3,284 of the 4,403 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 92.4% 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 OAK to SLC

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 94.5% 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