Flight number record

OO 5961

SkyWest Airlines · Sacramento to San Francisco

Route: SMF → SFO
Departs: 20:35
Flights: 336
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5961, 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 5961 earns an F−, which is as low as this site's scale goes for a reason. Only 43.1% of flights arrive inside the 15-minute window, 34 points worse than the national rate of 77.6%. Late arrivals average about an hour. Treat any tight connection here as a coin flip. That rests on 336 flights, with a median arrival 20 minutes late.

The national on-time rate over the same period is 77.6%, so OO 5961 runs 34 points behind the country as a whole. Across a thousand flights that is about 345 extra late arrivals.

On time

43.1%

Arrivals under 15 minutes late, of 325 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

3.27%

National rate is 1.81%

1 hour+ late

15.4%

National rate is 8.1%

These figures cover 336 flights between July 2025 and June 2026. Beyond the headline rate, 15.4% 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 5961 flies

OO 5961 flies SMF to SFO without a single fixed slot. Its most common scheduled departure was 20:35, used on 104 of 336 flights, with 20:30 (58 flights) and 20:33 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 20:35104 flights31.0%
Departs 20:3058 flights17.3%
Departs 20:3336 flights10.7%

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 20:35 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and OO 5961 runs 27 points worse at 43.1%. 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 5961 next to SMF to SFO

Every carrier on SMF to SFO combined arrived on time 64.6% of the time across 1,378 flights, so OO 5961 is 21 points behind it. SkyWest flew 1,325 flights on the same city pair under all its flight numbers, including this one, and those ran 63.5% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 36 points.

OO 5961 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5961thin sample	336	43.1%	62 min	3.27%	F−
All SkyWest Airlines on SMF–SFO	1,325	63.5%	68 min	1.81%	D
All carriers on SMF–SFO	1,378	64.6%	68 min	1.74%	D
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5961 quarter by quarter

OO 5961 did not run the same all year. Its best quarter was Jan–Mar 2026 at 61.8% on time and its weakest Apr–Jun 2026 at 30.3%, a swing of 31 points on roughly 84 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 flights39.7%
Oct–Dec 202589 flights42.7%
Jan–Mar 202678 flights61.8%
Apr–Jun 202690 flights30.3%

Scale runs 20% to 65%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5961 did best on Saturday at 60.5% on time and worst on Monday at 26.0%. Each day rests on about 48 flights, so a gap of 35 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5961 runs late

One category carries most of the weight here. National Airspace System accounts for 47% of the 11,000 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%
Late-arriving aircraft
32%
Carrier
17%
Extreme weather
4%

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 5,423 minutes out of 11,000, against a national NAS share of 21%. The split is drawn from 11,492 delay minutes reported on OO 5961.

Cancellations run at 3.27%, against 1.81% nationally. That is about one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

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. 15.4% 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.

Every one of the 336 flights under OO 5961 in the data flew SMF 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. 336 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 5961

For a booking, the cancellation rate is the figure to plan around on OO 5961: 3.27% of its 336 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.

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