Carrier route record
OOSBP→SFO
SkyWest Airlines · San Luis Obispo to San Francisco
- Flights
- 965
- Period
- July 2025 to June 2026
- Share of route
- 84%
- Carriers
- 2
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on SBP to SFO draws a D. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 965 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.6%, so SkyWest on SBP to SFO runs 15 points behind the country as a whole. Across a thousand flights that is about 153 extra late arrivals.
Key figures
On time
62.3%
Arrivals under 15 minutes late, of 953 completed flights
Avg delay
67 min
Across delayed arrivals only, not all flights
Cancelled
1.14%
National rate is 1.81%
Whole route
62.1%
Every carrier on SBP to SFO, 1,145 flights
These figures cover 965 flights between July 2025 and June 2026. Beyond the headline rate, 12.4% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
SkyWest against every carrier on SBP to SFO
SkyWest flew 965 of the 1,145 flights on SBP to SFO, most of the route. Its 62.3% on time is about level with the route as a whole at 62.1%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 62.3% to United at 60.7%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.
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) | 965 | 62.3% | 67 min | 1.14% | D |
| United Airlinesthin sample | 180 | 60.7% | 86 min | 1.11% | D |
Flight by flight
SkyWest flight numbers on SBP to SFO
Departure window
When SkyWest runs best on this route
Departure time matters more here than the choice of carrier. The gap between the best and worst window is 72 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am113 flights91.2%
- 8am–11am264 flights34.7%
- 11am–2pm68 flights72.1%
- 2pm–5pm339 flights71.4%
- 5pm–8pm144 flights75.6%
- 8pm–5am37 flights19.4%
Scale runs 10% to 95%. Rows with fewer than 30 flights show a dash.
The 8pm–5am window is where this operation falls apart: 19.4% on time, against 91.2% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 2pm–5pm window is the busiest, with 339 flights scheduled in it.
Across the year
SkyWest on SBP to SFO through the year
Delays peak in April, when the on-time rate falls to 19.6%. January is the strongest month at 80.2%. Moving a flexible trip across that boundary buys 61 points. October was the busiest month here, with 120 flights.
Across the week, Tuesday is the strongest day at 70.8% on time and Wednesday the weakest at 57.2%. 14 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. National Airspace System accounts for 48% of the 24,000 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.
- 48%National Airspace System
- 33%Carrier
- 10%Late-arriving aircraft
- 9%Extreme weather
48% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 12,000 minutes out of 24,000, against a national NAS share of 21%. The split is drawn from 24,176 reported delay minutes.
Cancellations sit at 1.14% against a national 1.81%, which is ordinary. Diversions add another 0.10%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 12.4% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
At 191 miles this is a short hop, and stage length matters more than it looks. A flight this short spends under two hours in the air, which leaves almost nothing to claw back a late pushback with. Delay here is decided on the ground, in the turn, which is why the 5am–8am window matters as much as it does.
The return leg is a different operation and performs like one: it runs 75.6% on time across 963 flights, 13 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 13 points of difference.
One caution: this is a thin sample. 965 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 SBP to SFO
Put together: treat all of this as provisional. 965 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 62.3% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 953 completed flights over 12 months sit behind that.
Related
Where to go next
- SBP to SFO, every carrier
- SkyWest on SFO to SBP, the return leg
- United Airlines on SBP to SFO60.7%
- SkyWest Airlines network-wide record
- San Francisco International (SFO) delay statistics
- How often a connection fails at the major US hubs
- The best time of day to fly, according to 7.04 million flight records
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.