Carrier route record
OOOAK→SLC
SkyWest Airlines · Oakland to Salt Lake City
- Flights
- 1,074
- Period
- September 2025 to August 2026
- Share of route
- 66%
- Carriers
- 2
Historical statistics for September 2025 to August 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 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 1,074 flights, with a median arrival 14 minutes early.
Set against the rest of the country, SkyWest's OAK to SLC record is 17 points better than the US average of 77.3%. That gap is worth roughly 168 fewer late arrivals for every thousand flights.
Key figures
On time
94.1%
Arrivals under 15 minutes late, of 1,070 completed flights
Avg delay
71 min
Across delayed arrivals only, not all flights
Cancelled
0.19%
National rate is 1.89%
Whole route
87.8%
Every carrier on OAK to SLC, 1,621 flights
These figures cover 1,074 flights between September 2025 and August 2026. The median arrival is 14 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.
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Carrier by carrier
SkyWest against every carrier on OAK to SLC
SkyWest flew 1,074 of the 1,621 flights on OAK to SLC, most of the route. Its 94.1% on time is 6 points better than the route as a whole, which runs 87.8%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 94.1% to Southwest at 75.5%.
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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines (this page) | 1,074 | 94.1% | 71 min | 0.19% | A+ |
| Southwest Airlines | 547 | 75.5% | 57 min | 0.00% | B+ |
Flight by flight
SkyWest flight numbers on OAK to SLC
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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 flights97.0%
- 8am–11am—
- 11am–2pm365 flights93.7%
- 2pm–5pm59 flights89.8%
- 5pm–8pm285 flights91.9%
- 8pm–5am—
Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.
The early departures do better, though not dramatically: 97.0% 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
October is the best month on the calendar at 97.8% on time. Shoulder season thins the schedule and takes the summer weather with it, and the operation gets its margin back. May was the busiest month here, with 93 flights.
Across the week, Tuesday is the strongest day at 96.8% on time and Thursday the weakest at 90.8%, a spread of 6 points.
Arrival by arrival
How late SkyWest on OAK to SLC runs when it is late
SkyWest on OAK to SLC often beats the schedule: 523 of 1,070 completed flights, 49%, arrived 15 minutes or more early. The 63 late arrivals split 20 under half an hour, 20 between 30 and 60 minutes, and 23 an hour or more.
- 15+ min early523 flights48.9%
- Within 15 min484 flights45.2%
- 15–29 min late20 flights1.9%
- 30–59 min late20 flights1.9%
- 1–2 hours late16 flights1.5%
- 2+ hours late7 flights0.7%
Scale runs 0% to 100%.
Share of 1,070 completed flights by arrival against schedule.
19 of 74 late departures made up the time and arrived on time, 26% of them. Only 8 left on time and still arrived late.
The worst days
Worst days for SkyWest on OAK to SLC
The latest arrival of the period was on 10 November 2025, 6 hours 50 minutes behind schedule; most of its delay minutes were filed as extreme weather. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 10 November 2025 | 6 hours 50 minutes | Extreme weather |
| 11 February 2026 | 4 hours 55 minutes | Carrier |
| 5 July 2026 | 4 hours 53 minutes | Carrier |
| 25 January 2026 | 3 hours 31 minutes | Carrier |
| 3 August 2026 | 3 hours 17 minutes | Carrier |
Delay causes
Why SkyWest runs late on this route
Carrier accounts for 74% of the 4,453 delay minutes carriers reported here, and the remaining four split what is left.
- 74%Carrier
- 23%Extreme weather
- 3%National Airspace System
Extreme weather accounts for 23% 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 3.9 times the usual weather exposure. The split is drawn from 4,453 reported delay minutes.
The largest share of delay minutes, 74%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,289 of the 4,453 delay minutes reported here.
Cancellations are rare at 0.19%, below the national 1.89% 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 8.3% 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.
The return leg runs 91.8% 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 94.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 1,070 completed flights over 12 months sit behind that.
Related
Where to go next
- OAK to SLC, every carrier
- SkyWest on SLC to OAK, the return leg
- Southwest Airlines on OAK to SLC75.5%
- SkyWest Airlines network-wide record
- Oakland International (OAK) delay statistics
- Salt Lake City International (SLC) delay statistics
- Worst months to fly in the US, ranked by the data
- Late aircraft, weather, or the airline: what actually causes US flight delays
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.