Flight number record

AS 372

Alaska Airlines · Seattle to Austin

Route: SEA → AUS
Departs: 17:52
Flights: 256
Period: September 2025 to August 2026

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

AS 372 lands a B+, level with the national rate of 77.3%. Roughly one flight in four arrives 15 minutes late or worse, and those flights are late by roughly 45 minutes on average. That rests on 256 flights, with a median arrival 3 minutes early.

On time

77.6%

Arrivals under 15 minutes late, of 255 completed flights

Avg delay

46 min

Across delayed arrivals only, not all flights

Cancelled

0.39%

National rate is 1.89%

1 hour+ late

4.3%

National rate is 8.3%

These figures cover 256 flights between September 2025 and August 2026. The median arrival is 3 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.

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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 256 flights, with 18:19 (49 flights) next.

Departs 17:5254 flights21.1%
Departs 18:1949 flights19.1%

Scale runs 0% to 100%.

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 68.0%, and AS 372 runs 10 points better at 77.6%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

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Against the route

AS 372 next to SEA to AUS

Every carrier on SEA to AUS combined arrived on time 78.5% of the time across 2,090 flights, so AS 372 is about level with it. Alaska flew 1,051 flights on the same city pair under all its flight numbers, including this one, and those ran 80.1% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 2 points.

AS 372 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 372thin sample	256	77.6%	46 min	0.39%	B+
All Alaska Airlines on SEA–AUS	1,051	80.1%	44 min	0.67%	B+
All carriers on SEA–AUS	2,090	78.5%	55 min	0.81%	B+
Alaska Airlines, whole network	309,844	79.7%	52 min	1.20%	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 2026 at 68.9%, a swing of 14 points on roughly 64 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 202521 flights—
Oct–Dec 202572 flights83.1%
Jan–Mar 202660 flights83.3%
Apr–Jun 202642 flights78.6%
Jul–Sep 202661 flights68.9%

Scale runs 60% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, AS 372 did best on Thursday at 82.5% on time and worst on Sunday at 63.4%. Each day rests on about 37 flights, so a gap of 19 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late AS 372 runs when it is late

AS 372 often beats the schedule: 76 of 255 completed flights, 30%, arrived 15 minutes or more early. Most of the lateness is short. 30 of the 57 late arrivals were under half an hour behind, and 11 reached an hour or more.

15+ min early76 flights29.8%
Within 15 min122 flights47.8%
15–29 min late30 flights11.8%
30–59 min late16 flights6.3%
1–2 hours late6 flights2.4%
2+ hours late5 flights2.0%

Scale runs 0% to 100%.

Share of 255 completed flights by arrival against schedule.

A late pushback is often recovered here: of 59 departures that left 15 minutes late or more, 21 still arrived on time. In the other direction, 19 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at AUS.

The worst days

Worst days for AS 372

The latest arrival of the period was on 25 July 2026, 4 hours 31 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). On three of the five worst days the largest share was filed as a late-arriving aircraft.

The latest arrivals of AS 372 in the period
Date	Arrived late by	Largest filed cause
25 July 2026	4 hours 31 minutes	Carrier
13 March 2026	2 hours 39 minutes	Extreme weather
24 October 2025	2 hours 35 minutes	Late-arriving aircraft
20 December 2025	2 hours 25 minutes	Late-arriving aircraft
24 June 2026	2 hours 12 minutes	Late-arriving aircraft

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 2,626 reported delay minutes.

National Airspace System
32%
Carrier
31%
Late-arriving aircraft
31%
Extreme weather
6%

No single cause dominates. national airspace system at 32%, carrier at 31% and late-arriving aircraft at 31% split the 2,626 reported delay minutes between them. An even spread like this usually means the operation is running close to its designed capacity with no one obvious weak point, and it is the hardest pattern for a traveller to route around. The split is drawn from 2,626 delay minutes reported on AS 372.

Cancellations are rare at 0.39%, below the national 1.89% 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 4.3% land an hour or more behind schedule, against 8.3% 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 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. 256 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, read AS 372 as 77.6% on time with 0.39% cancelled over 256 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures