Flight number record
OO 5737
SkyWest Airlines · Fresno to San Francisco
- Route
- FAT → SFO
- Departs
- 10:21
- Flights
- 344
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5737, 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 5737 earns an F+, which is as low as this site's scale goes for a reason. Only 49.7% of flights arrive inside the 15-minute window, 28 points worse than the national rate of 77.3%. Late arrivals average a little over an hour. Treat any tight connection here as a coin flip. That rests on 344 flights, with a median arrival 15 minutes late.
The national on-time rate over the same period is 77.3%, so OO 5737 runs 28 points behind the country as a whole. Across a thousand flights that is about 276 extra late arrivals.
Key figures
On time
49.7%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
77 min
Across delayed arrivals only, not all flights
Cancelled
0.00%
National rate is 1.89%
1 hour+ late
17.2%
National rate is 8.3%
These figures cover 344 flights between September 2025 and August 2026. Beyond the headline rate, 17.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5737 flies
OO 5737 flies FAT to SFO without a single fixed slot. Its most common scheduled departure was 10:21, used on 82 of 344 flights, with 10:45 (45 flights) and 10:54 (37 flights) next.
- Departs 10:2182 flights23.8%
- Departs 10:4545 flights13.1%
- Departs 10:5437 flights10.8%
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 10:21 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 5737 runs 34 points worse at 49.7%. 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 5737 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 5737 is 14 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 29 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5737thin sample | 344 | 49.7% | 77 min | 0.00% | F+ |
| 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 5737 quarter by quarter
OO 5737 did not run the same all year. Its best quarter was Jul–Sep 2025 at 73.3% on time and its weakest Jul–Sep 2026 at 33.9%, a swing of 39 points on roughly 69 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 flights73.3%
- Oct–Dec 202576 flights52.6%
- Jan–Mar 202685 flights67.1%
- Apr–Jun 202691 flights34.1%
- Jul–Sep 202662 flights33.9%
Scale runs 25% to 80%.
By weekday, OO 5737 did best on Tuesday at 58.0% on time and worst on Friday at 36.7%. Each day rests on about 49 flights, so a gap of 21 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5737 runs when it is late
The 173 late arrivals split 47 under half an hour, 67 between 30 and 60 minutes, and 59 an hour or more.
- 15+ min early39 flights11.3%
- Within 15 min132 flights38.4%
- 15–29 min late47 flights13.7%
- 30–59 min late67 flights19.5%
- 1–2 hours late31 flights9.0%
- 2+ hours late28 flights8.1%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 158 departures that left 15 minutes late or more, only 16 made it up before arrival. In the other direction, 31 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 5737
The latest arrival of the period was on 28 July 2026, 12 hours 13 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 July 2026 | 12 hours 13 minutes | Carrier |
| 2 July 2026 | 8 hours 51 minutes | Late-arriving aircraft |
| 29 November 2025 | 7 hours 52 minutes | Carrier |
| 18 May 2026 | 6 hours 41 minutes | Carrier |
| 2 June 2026 | 6 hours 29 minutes | Carrier |
Delay causes
Why OO 5737 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 13,000 reported delay minutes.
- 41%National Airspace System
- 40%Carrier
- 11%Late-arriving aircraft
- 8%Extreme weather
The largest share of delay minutes, 40%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,251 of the 13,000 delay minutes reported here. The split is drawn from 13,246 delay minutes reported on OO 5737.
Cancellations are rare at 0.00%, below the national 1.89% 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
17.2% 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 same number turns up on one other city pair in the data, including SUN to ORD (19), but none flew often enough under OO 5737 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to FAT to SFO only.
One caution: this is a thin sample. 344 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 5737
For a booking, OO 5737 is a flight to put a long connection behind. 17.2% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.
Related
Where to go next
- FAT to SFO, every carrier and departure
- SFO to FAT, the return direction
- SkyWest Airlines 5338 on the same route81.9%
- 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
- How often a connection fails at the major US hubs
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.