Flight number record
OO 5479
SkyWest Airlines · San Francisco to Monterey
- Route
- SFO → MRY
- Departs
- 09:30
- Flights
- 277
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5479, 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 5479 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 277 flights, with a median arrival 6 minutes early.
Key figures
On time
74.6%
Arrivals under 15 minutes late, of 276 completed flights
Avg delay
75 min
Across delayed arrivals only, not all flights
Cancelled
0.36%
National rate is 1.89%
1 hour+ late
13.4%
National rate is 8.3%
These figures cover 277 flights between September 2025 and August 2026. Beyond the headline rate, 13.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5479 flies
OO 5479 flies SFO to MRY without a single fixed slot. Its most common scheduled departure was 09:30, used on 103 of 277 flights, with 10:05 (82 flights) and 10:21 (32 flights) next.
- Departs 09:30103 flights37.2%
- Departs 10:0582 flights29.6%
- Departs 10:2132 flights11.6%
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 09:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 5479 runs 9 points worse at 74.6%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 5479 next to SFO to MRY
Every carrier on SFO to MRY combined arrived on time 72.6% of the time across 780 flights, so OO 5479 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5479thin sample | 277 | 74.6% | 75 min | 0.36% | C+ |
| All SkyWest Airlines on SFO–MRY | 780 | 72.6% | 89 min | 0.38% | C+ |
| All carriers on SFO–MRY | 780 | 72.6% | 89 min | 0.38% | C+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5479 quarter by quarter
OO 5479 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Jul–Sep 2026 at 64.3%, a swing of 29 points on roughly 69 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 202530 flights93.3%
- Oct–Dec 202592 flights82.6%
- Jan–Mar 20268 flights—
- Apr–Jun 202691 flights67.8%
- Jul–Sep 202656 flights64.3%
Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5479 did best on Saturday at 86.5% on time and worst on Thursday at 62.5%. Each day rests on about 40 flights, so a gap of 24 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5479 runs when it is late
OO 5479 often beats the schedule: 88 of 276 completed flights, 32%, arrived 15 minutes or more early. When OO 5479 is late it tends to be very late: 37 of its 70 late arrivals were an hour or more behind, and 11 were two hours or more.
- 15+ min early88 flights31.9%
- Within 15 min118 flights42.8%
- 15–29 min late18 flights6.5%
- 30–59 min late15 flights5.4%
- 1–2 hours late26 flights9.4%
- 2+ hours late11 flights4.0%
Scale runs 0% to 100%.
Share of 276 completed flights by arrival against schedule.
17 of 82 late departures made up the time and arrived on time, 21% of them. Only 5 left on time and still arrived late.
The worst days
Worst days for OO 5479
The latest arrival of the period was on 27 July 2026, 4 hours 40 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 27 July 2026 | 4 hours 40 minutes | Late-arriving aircraft |
| 29 July 2026 | 4 hours 34 minutes | Extreme weather |
| 13 August 2026 | 4 hours 31 minutes | Late-arriving aircraft |
| 17 July 2026 | 3 hours 50 minutes | National Airspace System |
| 3 August 2026 | 3 hours 36 minutes | Late-arriving aircraft |
Delay causes
Why OO 5479 runs late
National Airspace System accounts for 45% of the 5,227 delay minutes carriers reported here, and the remaining four split what is left.
- 45%National Airspace System
- 23%Late-arriving aircraft
- 20%Carrier
- 11%Extreme weather
Extreme weather accounts for 11% 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 1.8 times the usual weather exposure. The split is drawn from 5,227 delay minutes reported on OO 5479.
Cancellations are rare at 0.36%, 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
13.4% 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 three other city pairs in the data, including ORD to ABE (78), SAT to SFO (75) and SFO to FAT (6), but none flew often enough under OO 5479 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to MRY only.
One caution: this is a thin sample. 277 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 5479
For a booking, OO 5479 is a flight to put a long connection behind. 13.4% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- SFO to MRY, every carrier and departure
- MRY to SFO, the return direction
- SkyWest Airlines 5670 on the same route75.5%
- 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.