Flight number record
OO 4683
SkyWest Airlines · Tucson to San Francisco
- Route
- TUS → SFO
- Departs
- 07:02
- Flights
- 333
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4683, 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 4683 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 10 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 333 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.6%, so OO 4683 runs 10 points behind the country as a whole. Across a thousand flights that is about 95 extra late arrivals.
Key figures
On time
68.1%
Arrivals under 15 minutes late, of 332 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.81%
1 hour+ late
9.3%
National rate is 8.1%
These figures cover 333 flights between July 2025 and June 2026. Beyond the headline rate, 9.3% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Schedule
When OO 4683 flies
OO 4683 flies TUS to SFO without a single fixed slot. Its most common scheduled departure was 07:02, used on 75 of 333 flights, with 08:50 (52 flights) and 09:04 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 07:0275 flights22.5%
- Departs 08:5052 flights15.6%
- Departs 09:0440 flights12.0%
Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:02 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4683 runs 21 points worse at 68.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
Against the route
OO 4683 next to TUS to SFO
Every carrier on TUS to SFO combined arrived on time 71.7% of the time across 966 flights, so OO 4683 is 4 points behind it. SkyWest flew 904 flights on the same city pair under all its flight numbers, including this one, and those ran 71.9% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4683thin sample | 333 | 68.1% | 56 min | 0.00% | C+ |
| All SkyWest Airlines on TUS–SFO | 904 | 71.9% | 70 min | 0.33% | C+ |
| All carriers on TUS–SFO | 966 | 71.7% | 71 min | 0.41% | C+ |
| SkyWest Airlines, whole network | 852,935 | 79.0% | 88 min | 1.77% | B |
Across the year
OO 4683 quarter by quarter
OO 4683 did not run the same all year. Its best quarter was Oct–Dec 2025 at 89.4% on time and its weakest Apr–Jun 2026 at 19.8%, a swing of 70 points on roughly 83 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 202586 flights88.4%
- Oct–Dec 202566 flights89.4%
- Jan–Mar 202690 flights82.0%
- Apr–Jun 202691 flights19.8%
Scale runs 10% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, OO 4683 ranged from 61.7% on Friday to 72.3% on Saturday. With about 48 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why OO 4683 runs late
One category carries most of the weight here. National Airspace System accounts for 72% of the 5,926 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 72%National Airspace System
- 27%Carrier
- 0%Extreme weather
72% 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 4,277 minutes out of 5,926, against a national NAS share of 21%. The split is drawn from 5,926 delay minutes reported on OO 4683.
Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.3% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The same number turns up on two other city pairs in the data, including SFO to SMF (31) and LIT to IAH (1), but none flew often enough under OO 4683 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to TUS to SFO only.
One caution: this is a thin sample. 333 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 4683
For a booking, read OO 4683 as 68.1% on time with 0.00% cancelled over 333 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- TUS to SFO, every carrier and departure
- SFO to TUS, the return direction
- SkyWest Airlines 5583 on the same route76.5%
- 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 7.04 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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.