Flight number record

AS 352

Alaska Airlines · Seattle to Austin

Route: SEA → AUS
Departs: 12:18
Flights: 330
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 352, check with Alaska Airlines.

AS 352 lands a B+, 2 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 55 minutes on average. That is a workable record, not a spotless one. That rests on 330 flights, with a median arrival 2 minutes early.

On time

79.5%

Arrivals under 15 minutes late, of 327 completed flights

Avg delay

54 min

Across delayed arrivals only, not all flights

Cancelled

0.30%

National rate is 1.81%

1 hour+ late

4.9%

National rate is 8.1%

These figures cover 330 flights between July 2025 and June 2026. The median arrival is 2 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 AS 352 flies

AS 352 flies SEA to AUS without a single fixed slot. Its most common scheduled departure was 12:18, used on 49 of 330 flights, with 12:20 (44 flights) and 11:47 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 12:1849 flights14.8%
Departs 12:2044 flights13.3%
Departs 11:4734 flights10.3%

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 12:18 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and AS 352 runs level with that at 79.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

AS 352 next to SEA to AUS

Every carrier on SEA to AUS combined arrived on time 79.1% of the time across 2,059 flights, so AS 352 is about level with it. Alaska flew 1,096 flights on the same city pair under all its flight numbers, including this one, and those ran 78.4% on time. Across its whole network Alaska Airlines managed 79.1%, close to this flight's figure.

AS 352 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 352thin sample	330	79.5%	54 min	0.30%	B+
All Alaska Airlines on SEA–AUS	1,096	78.4%	48 min	0.73%	B+
All carriers on SEA–AUS	2,059	79.1%	57 min	0.97%	B+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 352 quarter by quarter

AS 352 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.9% on time and its weakest Jul–Sep 2025 at 66.7%, a swing of 22 points on roughly 83 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 202591 flights66.7%
Oct–Dec 202591 flights80.2%
Jan–Mar 202684 flights85.5%
Apr–Jun 202664 flights88.9%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, AS 352 did best on Tuesday at 88.0% on time and worst on Monday at 71.4%. Each day rests on about 47 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 352 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 3,625 reported delay minutes.

Carrier
41%
National Airspace System
31%
Late-arriving aircraft
25%
Extreme weather
3%
Security
1%

The largest share of delay minutes, 41%, 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 1,486 of the 3,625 delay minutes reported here. The split is drawn from 3,625 delay minutes reported on AS 352.

Cancellations are rare at 0.30%, 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 4.9% 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.

At 1,770 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

The same number turns up on one other city pair in the data, including AUS to SEA (28), but none flew often enough under AS 352 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to AUS only.

One caution: this is a thin sample. 330 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 AS 352

For a booking, read AS 352 as 79.5% on time with 0.30% cancelled over 330 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 Alaska 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