Flight profile · SkyWest Airlines
OO4087
Los Angeles (LAX) to San Diego (SAN) · scheduled 4:15 PM – 6:54 PM
How OO4087 performs
877 operations, September 2023 – July 2026.
OO4087 arrived on time 84.2% of the time, against 85.9% for all LAX → SAN flights, so this departure is 1.7 percentage points worse than the route as a whole. Against SkyWest Airlines’ own flights on this route it is 1.6 points worse.
Source: US DOT Bureau of Transportation Statistics · 877 operations, September 2023 – July 2026 · If OO4087 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where OO4087 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| OO4087 | 84.2% | 0.34% | -5 min | 5.4% | 877 |
| SkyWest Airlines on LAX → SAN | 85.8% | 0.51% | -7 min | 4.2% | 6,798 |
| All LAX → SAN flights | 85.9% | 0.51% | -7 min | 4.2% | 7,052 |
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026
Why OO4087 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
airspace and airport capacity, including weather-driven flow control
Share of the delay minutes US DOT attributed to each cause for OO4087 on LAX → SAN. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies OO4087 comes in late, and what that does to the departure.
The aircraft flying OO4087 came in 15 or more minutes late on 11% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Each departure is matched to the flight the same aircraft flew into LAX just before it, using the tail number in the DOT file, 841 of 875 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 |
|---|---|
| OO4087 | 11% |
| Network, same turn | 18% |
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 OO4087’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
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 September 2023 – July 2026
From pushback to gate
When it leaves LAX late, does that still matter by the time it reaches SAN?
On arrival at SAN, OO4087 spends 4.7 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 1.3 minutes shorter than a typical SAN arrival (6.0 min).
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 SAN. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 29,575 departures from LAX scheduled in the clock hour OO4087 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at SAN (297,664 flights), not just OO4087’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026
The hour it leaves LAX
Part of any flight’s record belongs to the clock rather than to the flight. OO4087 has one departure time, so this is what that time is worth.
On-time arrival rate. 29,575 departures from LAX are scheduled in the 4 PM–5 PM hour over the period, against 595,153 across the whole day.
OO4087 is scheduled out of LAX at 4:15 PM, in the 4 PM–5 PM bank. Departures from LAX in that hour arrive on time 79.3% of the time against 81.4% across the airport’s whole day, so the hour OO4087 leaves in is an ordinary one for LAX and explains nothing about its record either way.
The two airport figures cover every departure from LAX 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 · September 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does OO4087 run worse on particular days?
Tuesday is historically the most reliable day and Sunday the least, a gap of 10.9 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · September 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes OO4087 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 |
|---|---|---|---|
| SAN→LAX San Diego to Los Angeles | September 5, 2023 – July 31, 2026 | 692 | 87.7% |
| MGM→ATL Montgomery to Atlanta | May 7, 2024 – June 6, 2024 | 31 | — |
| LGA→OMA New York to Omaha | March 9, 2024 | 1 | — |
| RNO→SLC Reno to Salt Lake City | December 26–30, 2023 | 5 | — |
| SLC→RNO Salt Lake City to Reno | December 26–30, 2023 | 5 | — |
| ATL→SBN Atlanta to South Bend | November 2–3, 2023 | 2 | — |
| RDM→SEA Redmond to Seattle | July 1, 2023 – September 4, 2023 | 66 | — |
| SEA→RDM Seattle to Redmond | July 1, 2023 – September 4, 2023 | 66 | — |
Because the same number has served different journeys, the statistics above describe only the route OO4087 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.
30 min late
against a median of 5 min early
Percentiles over 877 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering September 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| OO5612 | SkyWest Airlines | 89.6% | 10 min early | 660 |
| OO5415 | SkyWest Airlines | 86.8% | 7 min early | 894 |
| OO3746 | SkyWest Airlines | 85.9% | 9 min early | 1,047 |
| OO4643 | SkyWest Airlines | 85.2% | 6 min early | 1,107 |
| OO4087 this flight | SkyWest Airlines | 84.2% | 5 min early | 877 |
| OO4018 | SkyWest Airlines | 83.4% | 3 min early | 742 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. OO4087 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 877 records of OO4087 operating LAX → SAN, 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
Analysis last recomputed