Flight number record
OO 4786
SkyWest Airlines · Palm Springs to San Francisco
- Route
- PSP → SFO
- Departs
- 15:40
- Flights
- 278
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4786, 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 4786 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 278 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so OO 4786 runs 7 points behind the country as a whole. Across a thousand flights that is about 66 extra late arrivals.
Key figures
On time
70.7%
Arrivals under 15 minutes late, of 276 completed flights
Avg delay
60 min
Across delayed arrivals only, not all flights
Cancelled
0.72%
National rate is 1.89%
1 hour+ late
9.4%
National rate is 8.3%
These figures cover 278 flights between September 2025 and August 2026. Beyond the headline rate, 9.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4786 flies
OO 4786 flies PSP to SFO without a single fixed slot. Its most common scheduled departure was 15:40, used on 65 of 278 flights, with 16:07 (58 flights) and 15:43 (37 flights) next.
- Departs 15:4065 flights23.4%
- Departs 16:0758 flights20.9%
- Departs 15:4337 flights13.3%
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 15:40 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 4786 runs level with that at 70.7%. 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 4786 next to PSP to SFO
Every carrier on PSP to SFO combined arrived on time 61.1% of the time across 2,598 flights, so OO 4786 is 10 points ahead of it. SkyWest flew 2,256 flights on the same city pair under all its flight numbers, including this one, and those ran 61.7% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 8 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4786thin sample | 278 | 70.7% | 60 min | 0.72% | C+ |
| All SkyWest Airlines on PSP–SFO | 2,256 | 61.7% | 68 min | 0.93% | D+ |
| All carriers on PSP–SFO | 2,598 | 61.1% | 71 min | 0.85% | D+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4786 quarter by quarter
OO 4786 did not run the same all year. Its best quarter was Jan–Mar 2026 at 85.9% on time and its weakest Apr–Jun 2026 at 56.5%, a swing of 29 points on roughly 70 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 20256 flights—
- Oct–Dec 202572 flights71.8%
- Jan–Mar 202686 flights85.9%
- Apr–Jun 202669 flights56.5%
- Jul–Sep 202645 flights62.2%
Scale runs 50% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4786 did best on Monday at 72.7% on time and worst on Friday at 59.6%. Each day rests on about 40 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4786 runs when it is late
OO 4786 often beats the schedule: 93 of 276 completed flights, 34%, arrived 15 minutes or more early. The 81 late arrivals split 29 under half an hour, 26 between 30 and 60 minutes, and 26 an hour or more.
- 15+ min early93 flights33.7%
- Within 15 min102 flights37.0%
- 15–29 min late29 flights10.5%
- 30–59 min late26 flights9.4%
- 1–2 hours late16 flights5.8%
- 2+ hours late10 flights3.6%
Scale runs 0% to 100%.
Share of 276 completed flights by arrival against schedule.
12 of 79 late departures made up the time and arrived on time, 15% of them. In the other direction, 14 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 OO 4786
The latest arrival of the period was on 25 February 2026, 5 hours 13 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across February, June, March and December, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 February 2026 | 5 hours 13 minutes | Extreme weather |
| 8 June 2026 | 4 hours 13 minutes | National Airspace System |
| 21 February 2026 | 3 hours 37 minutes | National Airspace System |
| 7 March 2026 | 3 hours 36 minutes | Late-arriving aircraft |
| 23 December 2025 | 2 hours 52 minutes | Late-arriving aircraft |
Delay causes
Why OO 4786 runs late
National Airspace System accounts for 51% of the 4,859 delay minutes carriers reported here, and the remaining four split what is left.
- 51%National Airspace System
- 29%Late-arriving aircraft
- 13%Carrier
- 7%Extreme weather
51% 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 2,459 minutes out of 4,859, against a national NAS share of 21%. The split is drawn from 4,859 delay minutes reported on OO 4786.
Cancellations are rare at 0.72%, 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 routes
What a delay on this flight costs
9.4% 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 same number turns up on five other city pairs in the data, including DEN to BIS (21), MLI to ORD (16) and PHX to SFO (6), but none flew often enough under OO 4786 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to PSP to SFO only.
One caution: this is a thin sample. 278 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 4786
For a booking, read OO 4786 as 70.7% on time with 0.72% cancelled over 278 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- PSP to SFO, every carrier and departure
- SFO to PSP, the return direction
- SkyWest Airlines 3497 on the same route56.4%
- San Francisco International (SFO) 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.