Flight number record

OO 5220

SkyWest Airlines · San Francisco to Sacramento

Route: SFO → SMF
Departs: 08:45
Flights: 362
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5220, 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 5220 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 a little over an hour on average. That is a workable record, not a spotless one. That rests on 362 flights, with a median arrival 6 minutes early.

Set against the rest of the country, OO 5220's record is 5 points better than the US average of 77.6%. That gap is worth roughly 48 fewer late arrivals for every thousand flights.

On time

82.4%

Arrivals under 15 minutes late, of 353 completed flights

Avg delay

76 min

Across delayed arrivals only, not all flights

Cancelled

2.49%

National rate is 1.81%

1 hour+ late

6.2%

National rate is 8.1%

These figures cover 362 flights between July 2025 and June 2026. The median arrival is 6 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 5220 flies

OO 5220 flies SFO to SMF without a single fixed slot. Its most common scheduled departure was 08:45, used on 49 of 362 flights, with 08:25 (46 flights) and 08:17 (40 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:4549 flights13.5%
Departs 08:2546 flights12.7%
Departs 08:1740 flights11.0%

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 08:45 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5220 runs level with that at 82.4%. 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 5220 next to SFO to SMF

Every carrier on SFO to SMF combined arrived on time 78.9% of the time across 1,377 flights, so OO 5220 is 4 points ahead of it. SkyWest flew 1,323 flights on the same city pair under all its flight numbers, including this one, and those ran 79.3% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 3 points.

OO 5220 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5220thin sample	362	82.4%	76 min	2.49%	B
All SkyWest Airlines on SFO–SMF	1,323	79.3%	79 min	1.74%	B
All carriers on SFO–SMF	1,377	78.9%	77 min	1.67%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5220 quarter by quarter

OO 5220 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.3% on time and its weakest Jan–Mar 2026 at 67.8%, a swing of 25 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 flights85.9%
Oct–Dec 202590 flights83.1%
Jan–Mar 202689 flights67.8%
Apr–Jun 202691 flights92.3%

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

By weekday, OO 5220 did best on Tuesday at 88.5% on time and worst on Thursday at 72.9%. Each day rests on about 52 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5220 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 4,708 reported delay minutes.

Late-arriving aircraft
33%
Carrier
33%
Extreme weather
25%
National Airspace System
8%

Extreme weather accounts for 25% 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 4.1 times the usual weather exposure. The split is drawn from 4,708 delay minutes reported on OO 5220.

Cancellations sit at 2.49% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

6.2% 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 a little over an hour, which a normal layover absorbs.

The same number turns up on one other city pair in the data, including SMF to LAX (6), but none flew often enough under OO 5220 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SFO to SMF only.

One caution: this is a thin sample. 362 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 5220

For a booking, read OO 5220 as 82.4% on time with 2.49% cancelled over 362 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