Carrier route record

OOSAN→AUS

SkyWest Airlines · San Diego to Austin

Flights: 1,000
Period: July 2025 to June 2026
Share of route: 39%
Carriers: 3

Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with SkyWest Airlines.

SkyWest on SAN to AUS lands a B, 3 points better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 1,000 flights, with a median arrival 5 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate SkyWest on SAN to AUS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

80.1%

Arrivals under 15 minutes late, of 986 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

1.30%

National rate is 1.81%

Whole route

73.0%

Every carrier on SAN to AUS, 2,552 flights

These figures cover 1,000 flights between July 2025 and June 2026. The median arrival is 5 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.

Carrier by carrier

SkyWest against every carrier on SAN to AUS

SkyWest flew 1,000 of the 2,552 flights on SAN to AUS, about 39% of it. Its 80.1% on time is 7 points better than the route as a whole, which runs 73.0%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from SkyWest at 80.1% to Southwest at 68.2%. One of those carriers flew fewer than 365 flights here, so treat their positions as rough.

Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.

On-time performance by carrier on SAN to AUS
Airline	Flights	On time	Avg delay	Cancelled	Grade
SkyWest Airlines (this page)	1,000	80.1%	62 min	1.30%	B
Frontier Airlinesthin sample	123	70.2%	48 min	1.63%	C
Southwest Airlines	1,429	68.2%	50 min	0.56%	C+

Flight by flight

SkyWest flight numbers on SAN to AUS

Departure window

When SkyWest runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 20 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am56 flights92.6%
8am–11am355 flights83.8%
11am–2pm55 flights77.8%
2pm–5pm175 flights72.3%
5pm–8pm359 flights78.8%
8pm–5am—

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 92.6% of the time, against 72.3% for the afternoon window. That is 20 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 359 flights scheduled in it.

Across the year

SkyWest on SAN to AUS through the year

Darker means more delays. Figures are on-time percentages.September best, July worst

July is the worst month at 66.1% on time, 24 points below September, the best at 89.8%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. March was the busiest month here, with 118 flights.

Across the week, Wednesday is the strongest day at 88.9% on time and Friday the weakest at 68.8%. 20 points is a smaller lever than departure hour, but it is free.

Delay causes

Why SkyWest runs late on this route

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 12,000 reported delay minutes.

Late-arriving aircraft
42%
Carrier
31%
National Airspace System
22%
Extreme weather
5%

42% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 12,000 reported delay minutes here, that single category outweighs weather by 8 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 12,091 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 92.6% on time here.

Cancellations sit at 1.30% against a national 1.81%, which is ordinary. Diversions add another 0.10%.

Connections and stage length

What a delay here costs

7.8% 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 about an hour, which a normal layover absorbs.

The 1,164 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 return leg runs 81.9% on time across 1,000 flights, within 2 points of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

One caution: this is a thin sample. 1,000 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 SkyWest on SAN to AUS

Put together: treat all of this as provisional. 1,000 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 80.1% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 986 completed flights over 12 months sit behind that.

Where to go next

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