Carrier route record
OOSBP→SFO
SkyWest Airlines · San Luis Obispo to San Francisco
- Flights
- 836
- Period
- September 2025 to August 2026
- Share of route
- 73%
- Carriers
- 2
Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with SkyWest Airlines.
SkyWest on SBP to SFO draws a D. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 836 flights, with a median arrival 6 minutes late.
The national on-time rate over the same period is 77.3%, so SkyWest on SBP to SFO runs 19 points behind the country as a whole. Across a thousand flights that is about 191 extra late arrivals.
Key figures
On time
58.2%
Arrivals under 15 minutes late, of 825 completed flights
Avg delay
70 min
Across delayed arrivals only, not all flights
Cancelled
1.32%
National rate is 1.89%
Whole route
56.4%
Every carrier on SBP to SFO, 1,139 flights
These figures cover 836 flights between September 2025 and August 2026. Beyond the headline rate, 15.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Carrier by carrier
SkyWest against every carrier on SBP to SFO
SkyWest flew 836 of the 1,139 flights on SBP to SFO, most of the route. Its 58.2% on time is 2 points better than the route as a whole, which runs 56.4%. Ranked by on-time rate it is first of two carriers on the route, where the range runs from SkyWest at 58.2% to United at 51.3%. 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) | 836 | 58.2% | 70 min | 1.32% | D |
| United Airlinesthin sample | 303 | 51.3% | 78 min | 0.99% | F+ |
Flight by flight
SkyWest flight numbers on SBP to SFO
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
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 68 points, against half a point between the best and worst carrier.
- 5am–8am112 flights91.1%
- 8am–11am203 flights34.3%
- 11am–2pm68 flights72.1%
- 2pm–5pm277 flights67.9%
- 5pm–8pm93 flights62.4%
- 8pm–5am83 flights23.2%
Scale runs 15% to 95%.
The 8pm–5am window is where this operation falls apart: 23.2% on time, against 91.1% 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 277 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 68.5% on time and Wednesday the weakest at 52.5%, a spread of 16 points.
Arrival by arrival
How late SkyWest on SBP to SFO runs when it is late
The 345 late arrivals split 102 under half an hour, 115 between 30 and 60 minutes, and 128 an hour or more.
- 15+ min early197 flights23.9%
- Within 15 min283 flights34.3%
- 15–29 min late102 flights12.4%
- 30–59 min late115 flights13.9%
- 1–2 hours late78 flights9.5%
- 2+ hours late50 flights6.1%
Scale runs 0% to 100%.
Share of 825 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 258 departures that left 15 minutes late or more, only 20 made it up before arrival. In the other direction, 107 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SFO.
The worst days
Worst days for SkyWest on SBP to SFO
The latest arrival of the period was on 27 February 2026, 10 hours behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 February 2026 | 10 hours | Carrier |
| 1 March 2026 | 6 hours 53 minutes | Extreme weather |
| 16 November 2025 | 6 hours 50 minutes | Carrier |
| 27 December 2025 | 6 hours 28 minutes | Carrier |
| 21 March 2026 | 6 hours 18 minutes | Late-arriving aircraft |
Delay causes
Why SkyWest runs late on this route
National Airspace System accounts for 54% of the 24,000 delay minutes carriers reported here, and the remaining four split what is left.
- 54%National Airspace System
- 29%Carrier
- 9%Late-arriving aircraft
- 8%Extreme weather
54% 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 13,000 minutes out of 24,000, against a national NAS share of 21%. The split is drawn from 24,247 reported delay minutes.
Cancellations sit at 1.32% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
15.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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 73.1% on time across 834 flights, 15 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 15 points of difference.
One caution: this is a thin sample. 836 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. 836 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 58.2% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 825 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 SFO51.3%
- 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 7.05 million flight records
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.