Flight profile · SkyWest Airlines
OO5688
San Francisco (SFO) to Tucson (TUS) · scheduled 6:25 PM – 8:43 PM
How OO5688 performs
934 operations, October 2023 – July 2026.
OO5688 arrived on time 80.8% of the time, against 82.2% for all SFO → TUS flights, so this departure is 1.4 percentage points worse than the route as a whole. Against SkyWest Airlines’ own flights on this route it is 1.4 points worse.
Source: US DOT Bureau of Transportation Statistics · 934 operations, October 2023 – July 2026 · If OO5688 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How OO5688 compares to other flight numbers, not just to itself.
Every day of the week performs about the same on this flight, steadier than 91% of 1,710 comparable flight numbers.
83.5% on time on the best day (Sunday) against 78.5% on the worst (Thursday).
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where OO5688 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
Ask for the position of OO5688 right now, if receivers on the ground are hearing it. Nothing is requested until you press the button.
Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| OO5688 | 80.8% | 0.43% | -7 min | 7.0% | 934 |
| SkyWest Airlines on SFO → TUS | 82.2% | 0.41% | -6 min | 6.2% | 2,677 |
| All SFO → TUS flights | 82.2% | 0.46% | -6 min | 6.2% | 2,806 |
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026
Why OO5688 runs late
Where US DOT attributed the delay minutes on this flight.
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for OO5688 on SFO → TUS. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering October 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies OO5688 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, OO5688 pushed back an average of 39 minutes late; when it came in on time or early, an average of 2 minutes early.
Each departure is matched to the flight the same aircraft flew into SFO just before it, using the tail number in the DOT file, 902 of 930 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 |
|---|---|---|---|
| OO5688 | 27% | 56% | 6% |
| 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 OO5688’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often OO5688 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 October 2023 – July 2026
From pushback to gate
When it leaves SFO late, does that still matter by the time it reaches TUS?
OO5688 pushes back an average of 11.5 minutes late and reaches the gate at TUS an average of 5.0 minutes late. The 6.5 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. Its 20.4 minutes on the taxiways at SFO is about what any departure from the airport in that hour spends.
On arrival at TUS, OO5688 spends 7.1 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 2.4 minutes longer than a typical TUS arrival (4.7 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 TUS. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 24,990 departures from SFO scheduled in the clock hour OO5688 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at TUS (59,301 flights), not just OO5688’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026
The hour it leaves SFO
Part of any flight’s record belongs to the clock rather than to the flight. OO5688 has one departure time, so this is what that time is worth.
On-time arrival rate. 24,990 departures from SFO are scheduled in the 6 PM–7 PM hour over the period, against 435,779 across the whole day.
OO5688 is scheduled out of SFO at 6:25 PM, in the 6 PM–7 PM bank. Departures from SFO in that hour arrive on time 79.0% of the time against 78.7% across the airport’s whole day, so the hour OO5688 leaves in is an ordinary one for SFO and explains nothing about its record either way.
The two airport figures cover every departure from SFO 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 · October 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does OO5688 run worse on particular days?
Sunday is historically the most reliable day and Thursday the least, a gap of 5.0 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · October 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes OO5688 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→FSD Chicago to Sioux Falls | March 10–24, 2026 | 3 | — |
| ORD→CAE Chicago to Columbia | October 5–25, 2025 | 21 | — |
| TUS→IAH Tucson to Houston | May 2–22, 2024 | 21 | — |
| BIS→DEN Bismarck to Denver | October 2–28, 2023 | 27 | — |
| RDU→SBN Raleigh–Durham to South Bend | October 1, 2023 | 1 | — |
| GSP→ORD Greenville/Greer/Spartanburg to Chicago | September 5–28, 2023 | 24 | — |
| IDA→DEN Idaho Falls to Denver | August 1, 2023 – September 4, 2023 | 35 | — |
| XNA→ORD Fayetteville/Springdale/Rogers to Chicago | July 8–31, 2023 | 24 | — |
Because the same number has served different journeys, the statistics above describe only the route OO5688 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.
38 min late
against a median of 7 min early
Percentiles over 934 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering October 2023 – July 2026
Data and methodology
Calculated by FlyerIntel from 934 records of OO5688 operating SFO → TUS, 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