Flight number record

OO 5338

SkyWest Airlines · Fresno to San Francisco

Route: FAT → SFO
Departs: 06:45
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by close to two hours on average. That is a workable record, not a spotless one. That rests on 364 flights, with a median arrival 7 minutes early.

Set against the rest of the country, OO 5338's record is 5 points better than the US average of 77.6%. That gap is worth roughly 46 fewer late arrivals for every thousand flights.

On time

82.2%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

102 min

Across delayed arrivals only, not all flights

Cancelled

1.37%

National rate is 1.81%

1 hour+ late

7.8%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. The median arrival is 7 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.

Schedule

When OO 5338 flies

OO 5338 flies FAT to SFO without a single fixed slot. Its most common scheduled departure was 06:45, used on 118 of 364 flights, with 06:30 (77 flights) and 07:30 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:45118 flights32.4%
Departs 06:3077 flights21.2%
Departs 07:3037 flights10.2%

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 06:45 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 82.2%. 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 5338 next to FAT to SFO

Every carrier on FAT to SFO combined arrived on time 67.0% of the time across 1,276 flights, so OO 5338 is 15 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 3 points.

OO 5338 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5338thin sample	364	82.2%	102 min	1.37%	B
All SkyWest Airlines on FAT–SFO	1,276	67.0%	80 min	1.25%	C
All carriers on FAT–SFO	1,276	67.0%	80 min	1.25%	C
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	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 91 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 202592 flights82.6%
Oct–Dec 202592 flights90.0%
Jan–Mar 202689 flights79.3%
Apr–Jun 202691 flights76.7%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5338 did best on Tuesday at 92.3% on time and worst on Monday at 70.6%. Each day rests on about 52 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5338 runs late

One category carries most of the weight here. Carrier accounts for 69% of the 6,555 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.

Carrier
69%
National Airspace System
14%
Late-arriving aircraft
12%
Extreme weather
5%

The largest share of delay minutes, 69%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 4,542 of the 6,555 delay minutes reported here. The split is drawn from 6,555 delay minutes reported on OO 5338.

Cancellations sit at 1.37% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

7.8% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says 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 364 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. 364 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 82.2% on time with 1.37% cancelled over 364 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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.

Key figures