Flight number record

OO 3251

SkyWest Airlines · Santa Ana to San Francisco

Route: SNA → SFO
Departs: 06:45
Flights: 282
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 3251, 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 3251 earns an A−. Nearly every flight arrives inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 16 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 55 minutes. That rests on 282 flights, with a median arrival 10 minutes early.

Set against the rest of the country, OO 3251's record is 16 points better than the US average of 77.6%. That gap is worth roughly 157 fewer late arrivals for every thousand flights.

On time

93.3%

Arrivals under 15 minutes late, of 267 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

3.19%

National rate is 1.81%

1 hour+ late

2.2%

National rate is 8.1%

These figures cover 282 flights between July 2025 and June 2026. The median arrival is 10 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 3251 flies

OO 3251 is scheduled to leave Santa Ana (SNA) at 06:45 local time and reach San Francisco (SFO) at 08:32. That slot held for 264 of the 282 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 06:45264 flights93.6%

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 3251 runs 4 points better at 93.3%. 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 3251 next to SNA to SFO

Every carrier on SNA to SFO combined arrived on time 70.3% of the time across 4,771 flights, so OO 3251 is 23 points ahead of it. SkyWest flew 3,564 flights on the same city pair under all its flight numbers, including this one, and those ran 71.2% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 14 points.

OO 3251 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 3251thin sample	282	93.3%	54 min	3.19%	A−
All SkyWest Airlines on SNA–SFO	3,564	71.2%	67 min	1.63%	C
All carriers on SNA–SFO	4,771	70.3%	67 min	1.47%	C
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 3251 quarter by quarter

OO 3251 did not run the same all year. Its best quarter was Oct–Dec 2025 at 97.2% on time and its weakest Apr–Jun 2026 at 81.4%, a swing of 16 points on roughly 71 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 202585 flights92.9%
Oct–Dec 202578 flights97.2%
Jan–Mar 202670 flights97.1%
Apr–Jun 202649 flights81.4%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 3251 ranged from 90.7% on Tuesday to 100.0% on Wednesday. With about 40 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 3251 runs late

One category carries most of the weight here. National Airspace System accounts for 42% of the 963 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
42%
Carrier
35%
Late-arriving aircraft
17%
Extreme weather
6%

42% 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 409 minutes out of 963, against a national NAS share of 21%. The split is drawn from 963 delay minutes reported on OO 3251.

Cancellations run at 3.19%, 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

Badly late arrivals are rare here: only 2.2% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

Every one of the 282 flights under OO 3251 in the data flew SNA 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. 282 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 3251

For a booking, the cancellation rate is the figure to plan around on OO 3251: 3.19% of its 282 scheduled flights did not operate. A late arrival costs roughly 55 minutes, 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