Flight number record
OO 5338
SkyWest Airlines · Fresno to San Francisco
- Route
- FAT → SFO
- Departs
- 06:30
- Flights
- 358
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5338, 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 5338 lands a B, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That rests on 358 flights, with a median arrival 6 minutes early.
Set against the rest of the country, OO 5338's record is 5 points better than the US average of 77.3%. That gap is worth roughly 46 fewer late arrivals for every thousand flights.
Key figures
On time
81.9%
Arrivals under 15 minutes late, of 353 completed flights
Avg delay
101 min
Across delayed arrivals only, not all flights
Cancelled
1.40%
National rate is 1.89%
1 hour+ late
7.9%
National rate is 8.3%
These figures cover 358 flights between September 2025 and August 2026. The median arrival is 6 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When OO 5338 flies
OO 5338 flies FAT to SFO without a single fixed slot. Its most common scheduled departure was 06:30, used on 106 of 358 flights, with 06:45 (68 flights) and 07:30 (37 flights) next.
- Departs 06:30106 flights29.6%
- Departs 06:4568 flights19.0%
- Departs 07:3037 flights10.3%
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 06:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5338 runs 7 points worse at 81.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 5338 next to FAT to SFO
Every carrier on FAT to SFO combined arrived on time 63.2% of the time across 1,284 flights, so OO 5338 is 19 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5338thin sample | 358 | 81.9% | 101 min | 1.40% | B |
| All SkyWest Airlines on FAT–SFO | 1,284 | 63.2% | 77 min | 1.32% | D |
| All carriers on FAT–SFO | 1,284 | 63.2% | 77 min | 1.32% | D |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5338 quarter by quarter
OO 5338 did not run the same all year. Its best quarter was Oct–Dec 2025 at 90.0% on time and its weakest Apr–Jun 2026 at 76.7%, a swing of 13 points on roughly 72 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 202530 flights76.7%
- Oct–Dec 202592 flights90.0%
- Jan–Mar 202689 flights79.3%
- Apr–Jun 202691 flights76.7%
- Jul–Sep 202656 flights83.9%
Scale runs 70% to 95%.
By weekday, OO 5338 did best on Tuesday at 91.7% on time and worst on Monday at 71.2%. Each day rests on about 51 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5338 runs when it is late
OO 5338 often beats the schedule: 96 of 353 completed flights, 27%, arrived 15 minutes or more early. The 64 late arrivals split 19 under half an hour, 17 between 30 and 60 minutes, and 28 an hour or more.
- 15+ min early96 flights27.2%
- Within 15 min193 flights54.7%
- 15–29 min late19 flights5.4%
- 30–59 min late17 flights4.8%
- 1–2 hours late12 flights3.4%
- 2+ hours late16 flights4.5%
Scale runs 0% to 100%.
Share of 353 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 40 departures that left 15 minutes late or more, only 2 made it up before arrival. In the other direction, 26 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SFO.
The worst days
Worst days for OO 5338
The latest arrival of the period was on 2 July 2026, 9 hours 6 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across July, November, February, April and September, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 July 2026 | 9 hours 6 minutes | Late-arriving aircraft |
| 26 November 2025 | 8 hours 27 minutes | Carrier |
| 9 February 2026 | 7 hours 12 minutes | Late-arriving aircraft |
| 20 April 2026 | 5 hours 39 minutes | National Airspace System |
| 19 September 2025 | 4 hours 28 minutes | Carrier |
Delay causes
Why OO 5338 runs late
Carrier accounts for 60% of the 6,440 delay minutes carriers reported here, and the remaining four split what is left.
- 60%Carrier
- 21%Late-arriving aircraft
- 15%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 60%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 3,864 of the 6,440 delay minutes reported here. The split is drawn from 6,440 delay minutes reported on OO 5338.
Cancellations sit at 1.40% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
7.9% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last close to two hours, which a normal layover absorbs.
Every one of the 358 flights under OO 5338 in the data flew FAT to SFO. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 358 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 5338
For a booking, read OO 5338 as 81.9% on time with 1.40% cancelled over 358 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- FAT to SFO, every carrier and departure
- SFO to FAT, the return direction
- SkyWest Airlines 5737 on the same route49.7%
- 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
- Worst months to fly in the US, ranked by the data
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.