Flight number record

OO 4951

SkyWest Airlines · San Antonio to Los Angeles

Route: SAT → LAX
Departs: 07:00
Flights: 328
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4951, 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 4951 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 3.1 hours. That rests on 328 flights, with a median arrival 11 minutes early.

Set against the rest of the country, OO 4951's record is 15 points better than the US average of 77.6%. That gap is worth roughly 150 fewer late arrivals for every thousand flights.

On time

92.6%

Arrivals under 15 minutes late, of 325 completed flights

Avg delay

186 min

Across delayed arrivals only, not all flights

Cancelled

0.61%

National rate is 1.81%

1 hour+ late

3.4%

National rate is 8.1%

These figures cover 328 flights between July 2025 and June 2026. The median arrival is 11 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 4951 flies

OO 4951 flies SAT to LAX without a single fixed slot. Its most common scheduled departure was 07:00, used on 97 of 328 flights, with 08:30 (42 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:0097 flights29.6%
Departs 08:3042 flights12.8%

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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4951 runs 3 points better at 92.6%. 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 4951 next to SAT to LAX

Every carrier on SAT to LAX combined arrived on time 86.6% of the time across 1,881 flights, so OO 4951 is 6 points ahead of it. SkyWest flew 697 flights on the same city pair under all its flight numbers, including this one, and those ran 90.3% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 14 points.

OO 4951 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4951thin sample	328	92.6%	186 min	0.61%	A+
All SkyWest Airlines on SAT–LAX	697	90.3%	124 min	0.29%	A+
All carriers on SAT–LAX	1,881	86.6%	89 min	0.48%	A+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4951 quarter by quarter

Quarter by quarter OO 4951 held fairly steady: 94.6% in Jul–Sep 2025, 95.0% in Oct–Dec 2025, 90.5% in Jan–Mar 2026 and 91.0% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights94.6%
Oct–Dec 202561 flights95.0%
Jan–Mar 202684 flights90.5%
Apr–Jun 202691 flights91.0%

Scale runs 80% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4951 did best on Tuesday at 97.9% on time and worst on Friday at 83.3%. Each day rests on about 47 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4951 runs late

One category carries most of the weight here. Carrier accounts for 91% of the 4,459 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.

Carrier
91%
Extreme weather
6%
National Airspace System
3%

The largest share of delay minutes, 91%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 4,063 of the 4,459 delay minutes reported here. The split is drawn from 4,459 delay minutes reported on OO 4951.

Cancellations are rare at 0.61%, 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

Badly late arrivals are rare here: only 3.4% 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.

The 1,211 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on one other city pair in the data, including RST to ORD (30), but none flew often enough under OO 4951 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SAT to LAX only.

One caution: this is a thin sample. 328 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 4951

For a booking, OO 4951 has one of the better records a US domestic flight can show: 92.6% on time and 0.61% cancelled. That is a base rate, not a promise about any single 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