Flight profile · SkyWest Airlines
OO4078
Las Vegas (LAS) to Santa Ana (SNA) · scheduled 8:00 AM – 10:26 AM
How OO4078 performs
607 operations, January 2025 – August 2026.
Between its first and last recorded date on LAS → SNA, OO4078 averaged about one operation a day or more (607 in 607 days, cancelled ones included).
OO4078 arrived on time 88.9% of the time, against 80.9% for all LAS → SNA flights, so this departure is 8.0 percentage points better than the route as a whole. Against SkyWest Airlines’ own flights on this route it is 3.1 points better.
Source: US DOT Bureau of Transportation Statistics · 607 operations, January 2025 – August 2026 · If OO4078 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where OO4078 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 |
|---|---|---|---|---|---|
| OO4078 | 88.9% | 0.00% | -12 min | 4.8% | 607 |
| SkyWest Airlines on LAS → SNA | 85.8% | 0.60% | -11 min | 5.3% | 1,341 |
| All LAS → SNA flights | 80.9% | 0.88% | -7 min | 5.0% | 12,985 |
None of OO4078’s 607 operations was cancelled; the route as a whole cancels 0.88%.
Source: FlyerIntel analysis of US DOT BTS data · January 2025 – August 2026
Why OO4078 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for OO4078 on LAS → SNA. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering January 2025 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies OO4078 comes in late, and what that does to the departure.
OO4078 is usually the aircraft’s first flight of the day: the schedule gives it a median of 11.3 hours on the ground at LAS, so its “inbound” is mostly the aircraft’s arrival the evening before.
The aircraft flying OO4078 came in 15 or more minutes late on 15% 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.
Matched by tail number to the aircraft’s previous flight into LAS: 378 of 607 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late |
|---|---|
| OO4078 | 15% |
| Network, same turn | 29% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less here than on a same-day turn.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often OO4078’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.
Source: US DOT Bureau of Transportation Statistics · Data covering January 2025 – August 2026
From pushback to gate
When it leaves LAS late, does that still matter by the time it reaches SNA?
OO4078 pushes back an average of 2.4 minutes late and reaches the gate at SNA an average of 0.4 minutes early. The 2.8 minutes between those two figures are slack the published schedule already carries, so on average a late pushback on this flight is made up before the gate. It spends 20.9 minutes on the taxiways at LAS, 3.3 minutes longer than a typical LAS departure in the same hour.
On arrival at SNA, OO4078 spends 9.3 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 2.6 minutes longer than a typical SNA arrival (6.7 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 38,137 LAS departures. Taxi-in is landing to gate, set against 141,256 arrivals at SNA. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · January 2025 – August 2026
The hour it leaves LAS
OO4078 has one departure time, 8:00 AM, so this is what that hour at LAS is worth.
On-time arrival rate. 38,137 departures from LAS are scheduled in the 8 AM–9 AM hour over the period, against 583,449 across the whole day.
OO4078 is scheduled out of LAS at 8:00 AM, in the 8 AM–9 AM bank. Departures from LAS in that hour arrive on time 86.3% of the time against 77.8% across the airport’s whole day — the slot alone is worth 8.5 points better before anything about this particular flight is considered.
Both airport figures cover every destination from LAS, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · January 2025 – August 2026 · Hours below 120 departures are not scored.
Other routes OO4078 has flown
Carriers reassign flight numbers. OO4078 also served these 18 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| SNA→LAS Santa Ana to Las Vegas | January 2, 2025 – August 31, 2026 | 591 | 87.5% |
| DTW→ORF Detroit to Norfolk | December 19–20, 2024 | 2 | — |
| ORF→DTW Norfolk to Detroit | December 19–20, 2024 | 2 | — |
| SJC→SLC San Jose to Salt Lake City | November 11, 2024 – December 18, 2024 | 37 | — |
| SLC→SJC Salt Lake City to San Jose | November 11, 2024 – December 18, 2024 | 37 | — |
| RDU→LGA Raleigh–Durham to New York | October 7, 2024 – November 10, 2024 | 30 | — |
| DTW→LEX Detroit to Lexington | September 15, 2024 – October 6, 2024 | 22 | — |
| LEX→DTW Lexington to Detroit | September 15, 2024 – October 6, 2024 | 22 | — |
| SLC→IDA Salt Lake City to Idaho Falls | June 7, 2024 – September 8, 2024 | 94 | 97.9% |
| DTW→PIT Detroit to Pittsburgh | May 7, 2024 – June 6, 2024 | 26 | — |
| PIT→DTW Pittsburgh to Detroit | May 7, 2024 – June 6, 2024 | 26 | — |
| MDW→MSP Chicago to Minneapolis | March 10, 2024 – May 6, 2024 | 50 | — |
| MSP→FSD Minneapolis to Sioux Falls | January 8, 2024 – March 8, 2024 | 61 | — |
| BUF→DTW Buffalo to Detroit | November 4, 2023 | 1 | — |
| DTW→BUF Detroit to Buffalo | November 4, 2023 | 1 | — |
| HSV→DTW Huntsville to Detroit | November 2–3, 2023 | 2 | — |
| OAK→LAX Oakland to Los Angeles | September 5, 2023 – October 27, 2023 | 53 | — |
| SLC→COS Salt Lake City to Colorado Springs | July 1, 2023 – September 4, 2023 | 66 | — |
The figures above describe only LAS → SNA, the route OO4078 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
19 min late
against a median of 12 min early
Percentiles over 607 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering January 2025 – August 2026
Data and methodology
Calculated by FlyerIntel from 607 records of OO4078 operating LAS → SNA, 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 reported separately, not in the on-time rate.
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