Flight number record

AS 502

Alaska Airlines · Seattle to Austin

Route: SEA → AUS
Departs: 09:03
Flights: 344
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 502, check with Alaska Airlines.

AS 502 lands a B, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 40 minutes on average. That is a workable record, not a spotless one. That rests on 344 flights, with a median arrival 4 minutes early.

Set against the rest of the country, AS 502's record is 5 points better than the US average of 77.6%. That gap is worth roughly 46 fewer late arrivals for every thousand flights.

On time

82.2%

Arrivals under 15 minutes late, of 338 completed flights

Avg delay

42 min

Across delayed arrivals only, not all flights

Cancelled

1.74%

National rate is 1.81%

1 hour+ late

2.7%

National rate is 8.1%

These figures cover 344 flights between July 2025 and June 2026. The median arrival is 4 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 502 flies

AS 502 flies SEA to AUS without a single fixed slot. Its most common scheduled departure was 09:03, used on 50 of 344 flights, with 09:07 (39 flights) and 09:49 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:0350 flights14.5%
Departs 09:0739 flights11.3%
Departs 09:4936 flights10.5%

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 09:03 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and AS 502 runs level with that at 82.2%. 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

AS 502 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 502 is 3 points ahead of 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 beats by 3 points.

AS 502 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 502thin sample	344	82.2%	42 min	1.74%	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 502 quarter by quarter

AS 502 did not run the same all year. Its best quarter was Apr–Jun 2026 at 94.3% on time and its weakest Oct–Dec 2025 at 73.3%, a swing of 21 points on roughly 86 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 202592 flights76.9%
Oct–Dec 202592 flights73.3%
Jan–Mar 202690 flights87.4%
Apr–Jun 202670 flights94.3%

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

By weekday, AS 502 did best on Tuesday at 90.0% on time and worst on Friday at 74.5%. Each day rests on about 49 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 502 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 2,527 reported delay minutes.

Carrier
41%
National Airspace System
39%
Late-arriving aircraft
17%
Extreme weather
4%

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 1,042 of the 2,527 delay minutes reported here. The split is drawn from 2,527 delay minutes reported on AS 502.

Cancellations sit at 1.74% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.7% 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 two other city pairs in the data, including AUS to SEA (28) and SEA to LAX (21), but none flew often enough under AS 502 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. 344 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 502

For a booking, read AS 502 as 82.2% on time with 1.74% cancelled over 344 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