Flight number record
OO 5688
SkyWest Airlines · San Francisco to Tucson
- Route
- SFO → TUS
- Departs
- 20:57
- Flights
- 296
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5688, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.
OO 5688 sits in the middle of the pack with a B+. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 296 flights, with a median arrival 5 minutes early.
Key figures
On time
75.2%
Arrivals under 15 minutes late, of 294 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
0.34%
National rate is 1.89%
1 hour+ late
9.5%
National rate is 8.3%
These figures cover 296 flights between September 2025 and August 2026. Beyond the headline rate, 9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
Fare search by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Schedule
When OO 5688 flies
OO 5688 flies SFO to TUS without a single fixed slot. Its most common scheduled departure was 20:57, used on 75 of 296 flights, with 20:45 (67 flights) and 18:25 (37 flights) next.
- Departs 20:5775 flights25.3%
- Departs 20:4567 flights22.6%
- Departs 18:2537 flights12.5%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 20:57 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and OO 5688 runs 5 points better at 75.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.
Against the route
OO 5688 next to SFO to TUS
Every carrier on SFO to TUS combined arrived on time 75.9% of the time across 944 flights, so OO 5688 is about level with it. SkyWest flew 881 flights on the same city pair under all its flight numbers, including this one, and those ran 76.0% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5688thin sample | 296 | 75.2% | 78 min | 0.34% | B+ |
| All SkyWest Airlines on SFO–TUS | 881 | 76.0% | 67 min | 0.34% | B+ |
| All carriers on SFO–TUS | 944 | 75.9% | 66 min | 0.32% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5688 quarter by quarter
OO 5688 did not run the same all year. Its best quarter was Jan–Mar 2026 at 84.9% on time and its weakest Jul–Sep 2026 at 41.0%, a swing of 44 points on roughly 74 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202524 flights—
- Oct–Dec 202566 flights76.9%
- Jan–Mar 202686 flights84.9%
- Apr–Jun 202680 flights75.0%
- Jul–Sep 202640 flights41.0%
Scale runs 35% to 90%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5688 did best on Sunday at 81.8% on time and worst on Friday at 68.2%. Each day rests on about 42 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5688 runs when it is late
OO 5688 often beats the schedule: 92 of 294 completed flights, 31%, arrived 15 minutes or more early. The 73 late arrivals split 22 under half an hour, 23 between 30 and 60 minutes, and 28 an hour or more.
- 15+ min early92 flights31.3%
- Within 15 min129 flights43.9%
- 15–29 min late22 flights7.5%
- 30–59 min late23 flights7.8%
- 1–2 hours late10 flights3.4%
- 2+ hours late18 flights6.1%
Scale runs 0% to 100%.
Share of 294 completed flights by arrival against schedule.
23 of 87 late departures made up the time and arrived on time, 26% of them. 9 flights left on time and still arrived late.
The worst days
Worst days for OO 5688
The latest arrival of the period was on 14 July 2026, 9 hours 55 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in July 2026.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 14 July 2026 | 9 hours 55 minutes | National Airspace System |
| 24 December 2025 | 3 hours 32 minutes | National Airspace System |
| 3 January 2026 | 3 hours 30 minutes | National Airspace System |
| 17 July 2026 | 3 hours 25 minutes | National Airspace System |
| 31 July 2026 | 3 hours 8 minutes | Late-arriving aircraft |
Delay causes
Why OO 5688 runs late
National Airspace System accounts for 60% of the 5,684 delay minutes carriers reported here, and the remaining four split what is left.
- 60%National Airspace System
- 24%Late-arriving aircraft
- 13%Carrier
- 2%Extreme weather
60% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,423 minutes out of 5,684, against a national NAS share of 21%. The split is drawn from 5,684 delay minutes reported on OO 5688.
Cancellations are rare at 0.34%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
9.5% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection here, and two hours if the onward flight is on a separate ticket.
The 751 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on three other city pairs in the data, including ORD to LEX (21), ORD to CAE (21) and ORD to FSD (3), but none flew often enough under OO 5688 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to TUS only.
One caution: this is a thin sample. 296 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking OO 5688
For a booking, read OO 5688 as 75.2% on time with 0.34% cancelled over 296 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SFO to TUS, every carrier and departure
- TUS to SFO, the return direction
- San Francisco International (SFO) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- The best time of day to fly, according to 7.05 million flight records
A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.