Flight profile · SkyWest Airlines
OO5248
Sacramento (SMF) to San Francisco (SFO) · scheduled 10:05 AM – 11:25 AM
How OO5248 performs
901 operations, December 2023 – July 2026.
OO5248 arrived on time 66.1% of the time, against 74.8% for all SMF → SFO flights, so this departure is 8.7 percentage points worse than the route as a whole. Against SkyWest Airlines’ own flights on this route it is 8.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 901 operations, December 2023 – July 2026 · If OO5248 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where OO5248 is right now
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| OO5248 | 66.1% | 1.66% | 0 min | 8.8% | 901 |
| SkyWest Airlines on SMF → SFO | 74.2% | 1.30% | -6 min | 8.1% | 3,530 |
| All SMF → SFO flights | 74.8% | 1.27% | -7 min | 8.0% | 3,626 |
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026
Why OO5248 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for OO5248 on SMF → SFO. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies OO5248 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, OO5248 pushed back an average of 52 minutes late; when it came in on time or early, an average of 4 minutes late.
Each departure is matched to the flight the same aircraft flew into SMF just before it, using the tail number in the DOT file, 873 of 886 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| OO5248 | 15% | 73% | 16% |
| Network, same turn | 18% | 85% | 10% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 45 to 59 minutes. How often OO5248’s aircraft landed 15 or more minutes late is about the same as the network’s and, once the aircraft was late, how often OO5248 left 15 or more minutes late is lower than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – July 2026
From pushback to gate
When it leaves SMF late, does that still matter by the time it reaches SFO?
On arrival at SFO, OO5248 spends 8.5 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is about what any arrival at SFO spends on the ground before reaching the gate.
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached SFO. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 11,422 departures from SMF scheduled in the clock hour OO5248 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at SFO (436,060 flights), not just OO5248’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026
The hour it leaves SMF
Part of any flight’s record belongs to the clock rather than to the flight. OO5248 has one departure time, so this is what that time is worth.
On-time arrival rate. 11,422 departures from SMF are scheduled in the 10 AM–11 AM hour over the period, against 172,472 across the whole day.
OO5248 is scheduled out of SMF at 10:05 AM, in the 10 AM–11 AM bank. Departures from SMF in that hour arrive on time 86.8% of the time against 83.2% across the airport’s whole day — the slot alone is worth 3.6 points better before anything about this particular flight is considered.
The two airport figures cover every departure from SMF to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does OO5248 run worse on particular days?
Saturday is historically the most reliable day and Monday the least, a gap of 16.3 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · December 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes OO5248 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| ORD→ASE Chicago to Aspen | December 18, 2025 | 1 | — |
| DEN→PSP Denver to Palm Springs | March 8–29, 2025 | 4 | — |
| DEN→DSM Denver to Des Moines | February 15, 2025 – March 1, 2025 | 3 | — |
| SFO→ACV San Francisco to Arcata/Eureka | January 7, 2025 – February 12, 2025 | 37 | — |
| IAH→ECP Houston to Panama City Beach | October 29, 2023 – November 30, 2023 | 31 | — |
| MAF→DEN Midland to Denver | September 29, 2023 – October 28, 2023 | 29 | — |
| JAC→DEN Jackson to Denver | October 23, 2023 | 1 | — |
| ORD→SCE Chicago to State College | September 5–28, 2023 | 24 | — |
| ECP→DEN Panama City Beach to Denver | July 1, 2023 – September 2, 2023 | 10 | — |
| ORD→DCA Chicago to Washington | July 2–31, 2023 | 26 | — |
Because the same number has served different journeys, the statistics above describe only the route OO5248 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
56 min late
against a median of 0 min early
Percentiles over 901 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering December 2023 – July 2026
Data and methodology
Calculated by FlyerIntel from 901 records of OO5248 operating SMF → SFO, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
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