Flight profile · SkyWest Airlines
OO3951
Los Angeles (LAX) to Phoenix (PHX) · scheduled 10:00 AM – 11:30 AM
How OO3951 performs
692 operations, March 2024 – July 2026.
OO3951 arrived on time 84.5% of the time, against 81.5% for all LAX → PHX flights, so this departure is 3.0 percentage points better than the route as a whole. Against SkyWest Airlines’ own flights on this route it is 1.9 points worse.
Source: US DOT Bureau of Transportation Statistics · 692 operations, March 2024 – July 2026 · If OO3951 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where OO3951 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 |
|---|---|---|---|---|---|
| OO3951 | 84.5% | 0.14% | -6 min | 3.8% | 692 |
| SkyWest Airlines on LAX → PHX | 86.4% | 0.32% | -7 min | 3.6% | 6,792 |
| All LAX → PHX flights | 81.5% | 0.50% | -6 min | 5.7% | 22,560 |
Source: FlyerIntel analysis of US DOT BTS data · March 2024 – July 2026
Why OO3951 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 OO3951 on LAX → PHX. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering March 2024 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies OO3951 comes in late, and what that does to the departure.
The aircraft flying OO3951 came in 15 or more minutes late on 9% 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, 660 of 691 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 |
|---|---|
| OO3951 | 9% |
| 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 OO3951’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 March 2024 – July 2026
From pushback to gate
When it leaves LAX late, does that still matter by the time it reaches PHX?
On arrival at PHX, OO3951 spends 5.9 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 1.6 minutes shorter than a typical PHX arrival (7.5 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 PHX. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 40,609 departures from LAX scheduled in the clock hour OO3951 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at PHX (598,496 flights), not just OO3951’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · March 2024 – July 2026
The hour it leaves LAX
Part of any flight’s record belongs to the clock rather than to the flight. OO3951 has one departure time, so this is what that time is worth.
On-time arrival rate. 40,609 departures from LAX are scheduled in the 10 AM–11 AM hour over the period, against 595,153 across the whole day.
OO3951 is scheduled out of LAX at 10:00 AM, in the 10 AM–11 AM bank. Departures from LAX in that hour arrive on time 79.8% of the time against 81.4% across the airport’s whole day, so the hour OO3951 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 · March 2024 – July 2026 · Hours below 120 departures are not scored.
Other routes OO3951 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 |
|---|---|---|---|
| PHX→LAX Phoenix to Los Angeles | March 10, 2024 – July 31, 2026 | 671 | 87.3% |
| MSP→DLH Minneapolis to Duluth | July 15, 2023 – March 7, 2026 | 24 | — |
| OMA→DTW Omaha to Detroit | December 19, 2024 – January 4, 2026 | 34 | — |
| BTV→DTW Burlington to Detroit | January 6–17, 2025 | 12 | — |
| DTW→BTV Detroit to Burlington | January 6–17, 2025 | 12 | — |
| MBS→DTW Freeland to Detroit | January 8, 2024 – March 9, 2024 | 62 | — |
| DTW→MSN Detroit to Madison | January 7, 2024 | 1 | — |
| MSP→JFK Minneapolis to New York | January 6, 2024 | 1 | — |
| CVG→SLC Cincinnati / Covington to Salt Lake City | January 1–5, 2024 | 4 | — |
| SLC→CVG Salt Lake City to Cincinnati / Covington | January 1–5, 2024 | 4 | — |
| AGS→ATL Augusta to Atlanta | August 12, 2023 – December 15, 2023 | 10 | — |
| ATL→AGS Atlanta to Augusta | August 12, 2023 – December 15, 2023 | 10 | — |
| GRB→DTW Green Bay to Detroit | September 10, 2023 – December 4, 2023 | 37 | — |
| DTW→GRB Detroit to Green Bay | November 23, 2023 – December 4, 2023 | 7 | — |
| JFK→CLE New York to Cleveland | October 28, 2023 – November 4, 2023 | 8 | — |
| DTW→MKE Detroit to Milwaukee | September 5–8, 2023 | 4 | — |
| MKE→DTW Milwaukee to Detroit | September 5–8, 2023 | 4 | — |
| CLE→DTW Cleveland to Detroit | July 2, 2023 – August 5, 2023 | 5 | — |
| DTW→CLE Detroit to Cleveland | July 2, 2023 – August 5, 2023 | 5 | — |
| DLH→MSP Duluth to Minneapolis | July 15–22, 2023 | 2 | — |
| BZN→SLC Bozeman to Salt Lake City | July 5–9, 2023 | 4 | — |
| SLC→BZN Salt Lake City to Bozeman | July 5–9, 2023 | 4 | — |
Because the same number has served different journeys, the statistics above describe only the route OO3951 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.
24 min late
against a median of 6 min early
Percentiles over 692 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering March 2024 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| OO3894 | SkyWest Airlines | 86.3% | 6 min early | 700 |
| OO4119 | SkyWest Airlines | 86.0% | 6 min early | 908 |
| OO3951 this flight | SkyWest Airlines | 84.5% | 6 min early | 692 |
| OO4077 | SkyWest Airlines | 82.3% | 4 min early | 666 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. OO3951 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 692 records of OO3951 operating LAX → PHX, 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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