Flight number record
OO 4787
SkyWest Airlines · San Luis Obispo to Denver
- Route
- SBP → DEN
- Departs
- 12:59
- Flights
- 271
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4787, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 4787 lands a B+, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 271 flights, with a median arrival 8 minutes early.
Key figures
On time
80.3%
Arrivals under 15 minutes late, of 269 completed flights
Avg delay
101 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
10.8%
National rate is 8.1%
These figures cover 271 flights between July 2025 and June 2026. Beyond the headline rate, 10.8% 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.
Schedule
When OO 4787 flies
OO 4787 flies SBP to DEN without a single fixed slot. Its most common scheduled departure was 12:59, used on 65 of 271 flights, with 13:00 (60 flights) and 12:30 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 12:5965 flights24.0%
- Departs 13:0060 flights22.1%
- Departs 12:3037 flights13.7%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 12:59 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4787 runs level with that at 80.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
Against the route
OO 4787 next to SBP to DEN
Every carrier on SBP to DEN combined arrived on time 81.2% of the time across 724 flights, so OO 4787 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4787thin sample | 271 | 80.3% | 101 min | 0.00% | B+ |
| All SkyWest Airlines on SBP–DENthin sample | 321 | 78.0% | 92 min | 0.00% | B+ |
| All carriers on SBP–DEN | 724 | 81.2% | 118 min | 0.41% | B+ |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 4787 quarter by quarter
OO 4787 did not run the same all year. Its best quarter was Jan–Mar 2026 at 85.6% on time and its weakest Oct–Dec 2025 at 74.7%, a swing of 11 points on roughly 68 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202540 flights82.1%
- Oct–Dec 202591 flights74.7%
- Jan–Mar 202690 flights85.6%
- Apr–Jun 202650 flights79.6%
Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4787 did best on Tuesday at 92.1% on time and worst on Thursday at 71.1%. Each day rests on about 39 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Delay causes
Why OO 4787 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 5,375 reported delay minutes.
- 29%Late-arriving aircraft
- 27%National Airspace System
- 27%Carrier
- 17%Extreme weather
Extreme weather accounts for 17% 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 quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.7 times the usual weather exposure. The split is drawn from 5,375 delay minutes reported on OO 4787.
Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.8% 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.
The 931 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 same number turns up on five other city pairs in the data, including GRB to ORD (47), DEN to PSP (41) and LAX to SMF (3), but none flew often enough under OO 4787 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SBP to DEN only.
One caution: this is a thin sample. 271 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 OO 4787
For a booking, read OO 4787 as 80.3% on time with 0.00% cancelled over 271 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SBP to DEN, every carrier and departure
- DEN to SBP, the return direction
- Denver International (DEN) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- How often a connection fails at the major US hubs
A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
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.