Flight number record
OO 4787
SkyWest Airlines · San Luis Obispo to Denver
- Route
- SBP → DEN
- Departs
- 13:00
- Flights
- 258
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 258 flights, with a median arrival 8 minutes early.
Key figures
On time
80.2%
Arrivals under 15 minutes late, of 257 completed flights
Avg delay
104 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
11.3%
National rate is 8.3%
These figures cover 258 flights between September 2025 and August 2026. Beyond the headline rate, 11.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4787 flies
OO 4787 flies SBP to DEN without a single fixed slot. Its most common scheduled departure was 13:00, used on 60 of 258 flights, with 12:59 (52 flights) and 12:30 (37 flights) next.
- Departs 13:0060 flights23.3%
- Departs 12:5952 flights20.2%
- Departs 12:3037 flights14.3%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 13:00 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and OO 4787 runs level with that at 80.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 4787 next to SBP to DEN
Every carrier on SBP to DEN combined arrived on time 82.2% of the time across 724 flights, so OO 4787 is 2 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4787thin sample | 258 | 80.2% | 104 min | 0.00% | B+ |
| All SkyWest Airlines on SBP–DENthin sample | 259 | 80.2% | 104 min | 0.00% | B+ |
| All carriers on SBP–DEN | 724 | 82.2% | 115 min | 0.41% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | 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 86 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 202527 flights—
- 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 91.9% on time and worst on Thursday at 69.4%. Each day rests on about 37 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4787 runs when it is late
OO 4787 often beats the schedule: 88 of 257 completed flights, 34%, arrived 15 minutes or more early. When OO 4787 is late it tends to be very late: 29 of its 51 late arrivals were an hour or more behind, and 18 were two hours or more.
- 15+ min early88 flights34.2%
- Within 15 min118 flights45.9%
- 15–29 min late13 flights5.1%
- 30–59 min late9 flights3.5%
- 1–2 hours late11 flights4.3%
- 2+ hours late18 flights7.0%
Scale runs 0% to 100%.
Share of 257 completed flights by arrival against schedule.
15 of 61 late departures made up the time and arrived on time, 25% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for OO 4787
The latest arrival of the period was on 16 April 2026, 9 hours 48 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The five worst days are spread across April, November, January and October, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 16 April 2026 | 9 hours 48 minutes | Carrier |
| 16 November 2025 | 5 hours 20 minutes | Carrier |
| 15 January 2026 | 5 hours 5 minutes | Extreme weather |
| 20 October 2025 | 3 hours 52 minutes | Extreme weather |
| 10 October 2025 | 3 hours 36 minutes | Late-arriving aircraft |
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 5,311 reported delay minutes.
- 29%Late-arriving aircraft
- 27%Carrier
- 27%National Airspace System
- 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 2.9 times the usual weather exposure. The split is drawn from 5,311 delay minutes reported on OO 4787.
Cancellations are rare at 0.00%, below the national 1.89% 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
11.3% 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.
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.
The same number turns up on three other city pairs in the data, including DEN to PSP (81), DEN to SLC (21) 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. 258 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 80.2% on time with 0.00% cancelled over 258 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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.