Flight number record

OO 5479

SkyWest Airlines · San Francisco to Monterey

Route: SFO → MRY
Departs: 09:30
Flights: 283
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5479, 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 5479 lands a B+, 2 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 283 flights, with a median arrival 7 minutes early.

On time

79.1%

Arrivals under 15 minutes late, of 282 completed flights

Avg delay

65 min

Across delayed arrivals only, not all flights

Cancelled

0.35%

National rate is 1.81%

1 hour+ late

11.0%

National rate is 8.1%

These figures cover 283 flights between July 2025 and June 2026. Beyond the headline rate, 11.0% 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 5479 flies

OO 5479 flies SFO to MRY without a single fixed slot. Its most common scheduled departure was 09:30, used on 116 of 283 flights, with 10:05 (90 flights) and 10:21 (32 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:30116 flights41.0%
Departs 10:0590 flights31.8%
Departs 10:2132 flights11.3%

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 09:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5479 runs 5 points worse at 79.1%. 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 5479 next to SFO to MRY

Every carrier on SFO to MRY combined arrived on time 77.4% of the time across 709 flights, so OO 5479 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, close to this flight's figure.

OO 5479 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5479thin sample	283	79.1%	65 min	0.35%	B+
All SkyWest Airlines on SFO–MRY	709	77.4%	90 min	0.42%	B+
All carriers on SFO–MRY	709	77.4%	90 min	0.42%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5479 quarter by quarter

OO 5479 did not run the same all year. Its best quarter was Jul–Sep 2025 at 88.0% on time and its weakest Apr–Jun 2026 at 67.8%, a swing of 20 points on roughly 94 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 flights88.0%
Oct–Dec 202592 flights82.6%
Jan–Mar 20268 flights—
Apr–Jun 202691 flights67.8%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5479 did best on Saturday at 92.5% on time and worst on Monday at 62.5%. Each day rests on about 40 flights, so a gap of 30 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5479 runs late

One category carries most of the weight here. National Airspace System accounts for 47% of the 3,814 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.

National Airspace System
47%
Carrier
29%
Late-arriving aircraft
18%
Extreme weather
5%

47% 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 1,797 minutes out of 3,814, against a national NAS share of 21%. The split is drawn from 3,814 delay minutes reported on OO 5479.

Cancellations are rare at 0.35%, below the national 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.0% 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 same number turns up on two other city pairs in the data, including ORD to ABE (78) and SAT to SFO (40), but none flew often enough under OO 5479 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to MRY only.

One caution: this is a thin sample. 283 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 5479

For a booking, read OO 5479 as 79.1% on time with 0.35% cancelled over 283 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