Flight number record

OO 5670

SkyWest Airlines · San Francisco to Monterey

Route: SFO → MRY
Departs: 21:05
Flights: 281
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5670, 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 5670 lands a B+, level with the national rate of 77.6%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by about 2.2 hours on average. That is a workable record, not a spotless one. That rests on 281 flights, with a median arrival 5 minutes early.

On time

76.9%

Arrivals under 15 minutes late, of 277 completed flights

Avg delay

130 min

Across delayed arrivals only, not all flights

Cancelled

0.36%

National rate is 1.81%

1 hour+ late

10.5%

National rate is 8.1%

These figures cover 281 flights between July 2025 and June 2026. Beyond the headline rate, 10.5% 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 5670 flies

OO 5670 flies SFO to MRY without a single fixed slot. Its most common scheduled departure was 21:05, used on 86 of 281 flights, with 22:49 (48 flights) and 22:40 (39 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:0586 flights30.6%
Departs 22:4948 flights17.1%
Departs 22:4039 flights13.9%

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 21:05 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and OO 5670 runs 6 points better at 76.9%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 5670 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 5670 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 2 points.

OO 5670 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5670thin sample	281	76.9%	130 min	0.36%	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 5670 quarter by quarter

OO 5670 did not run the same all year. Its best quarter was Jan–Mar 2026 at 92.2% on time and its weakest Jul–Sep 2025 at 67.9%, a swing of 24 points on roughly 70 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 202579 flights67.9%
Oct–Dec 202574 flights80.8%
Jan–Mar 202653 flights92.2%
Apr–Jun 202675 flights72.0%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5670 did best on Saturday at 97.1% on time and worst on Sunday at 60.0%. Each day rests on about 40 flights, so a gap of 37 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5670 runs late

One category carries most of the weight here. National Airspace System accounts for 45% of the 8,338 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
45%
Carrier
20%
Extreme weather
18%
Late-arriving aircraft
16%

Extreme weather accounts for 18% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.9 times the usual weather exposure. The split is drawn from 8,338 delay minutes reported on OO 5670.

Cancellations are rare at 0.36%, 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. 10.5% 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 three other city pairs in the data, including ORD to CMH (20), RDM to SFO (19) and OMA to DEN (13), but none flew often enough under OO 5670 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. 281 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 5670

For a booking, read OO 5670 as 76.9% on time with 0.36% cancelled over 281 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