Flight number record

AS 372

Alaska Airlines · Seattle to Austin

Route: SEA → AUS
Departs: 17:52
Flights: 253
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 372, check with Alaska Airlines.

AS 372 sits in the middle of the pack with a C+. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.6%. The late ones land roughly 50 minutes behind schedule. That rests on 253 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.6%, so AS 372 runs 7 points behind the country as a whole. Across a thousand flights that is about 66 extra late arrivals.

On time

71.0%

Arrivals under 15 minutes late, of 252 completed flights

Avg delay

48 min

Across delayed arrivals only, not all flights

Cancelled

0.40%

National rate is 1.81%

1 hour+ late

6.0%

National rate is 8.1%

These figures cover 253 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 372 flies

AS 372 flies SEA to AUS without a single fixed slot. Its most common scheduled departure was 17:52, used on 54 of 253 flights, with 17:56 (49 flights) and 17:55 (32 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:5254 flights21.3%
Departs 17:5649 flights19.4%
Departs 17:5532 flights12.6%

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 17:52 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and AS 372 runs 3 points better at 71.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

AS 372 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 372 is 8 points behind 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%, which this flight trails by 8 points.

AS 372 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 372thin sample	253	71.0%	48 min	0.40%	C+
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 372 quarter by quarter

AS 372 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.3% on time and its weakest Jul–Sep 2025 at 46.8%, a swing of 37 points on roughly 63 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 202579 flights46.8%
Oct–Dec 202572 flights83.1%
Jan–Mar 202660 flights83.3%
Apr–Jun 202642 flights78.6%

Scale runs 40% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, AS 372 did best on Friday at 78.9% on time and worst on Sunday at 58.5%. Each day rests on about 36 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 372 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 3,490 reported delay minutes.

Late-arriving aircraft
36%
National Airspace System
33%
Carrier
26%
Extreme weather
4%

36% 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 3,490 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 3,490 delay minutes reported on AS 372.

Cancellations are rare at 0.40%, 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

6.0% 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 roughly 50 minutes, which a normal layover absorbs.

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 three other city pairs in the data, including PHX to PDX (34), SFO to EWR (28) and SFO to LAS (8), but none flew often enough under AS 372 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. 253 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 372

For a booking, AS 372 is one of the weaker ways to fly SEA to AUS: 8 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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