Flight number record

AS 134

Alaska Airlines · Anchorage to Seattle

Route: ANC → SEA
Departs: 16:30
Flights: 254
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 134, check with Alaska Airlines.

AS 134 lands a B+, 4 points better than the national rate of 77.6%. Roughly 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 254 flights, with a median arrival 9 minutes early.

Set against the rest of the country, AS 134's record is 4 points better than the US average of 77.6%. That gap is worth roughly 41 fewer late arrivals for every thousand flights.

On time

81.7%

Arrivals under 15 minutes late, of 252 completed flights

Avg delay

59 min

Across delayed arrivals only, not all flights

Cancelled

0.79%

National rate is 1.81%

1 hour+ late

6.7%

National rate is 8.1%

These figures cover 254 flights between July 2025 and June 2026. The median arrival is 9 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 134 flies

AS 134 flies ANC to SEA without a single fixed slot. Its most common scheduled departure was 16:30, used on 66 of 254 flights, with 17:00 (64 flights) and 16:46 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:3066 flights26.0%
Departs 17:0064 flights25.2%
Departs 16:4645 flights17.7%

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 16:30 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and AS 134 runs 9 points better at 81.7%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

AS 134 next to ANC to SEA

Every carrier on ANC to SEA combined arrived on time 85.5% of the time across 6,681 flights, so AS 134 is 4 points behind it. Alaska flew 4,926 flights on the same city pair under all its flight numbers, including this one, and those ran 85.7% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 3 points.

AS 134 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 134thin sample	254	81.7%	59 min	0.79%	B+
All Alaska Airlines on ANC–SEA	4,926	85.7%	52 min	1.24%	A
All carriers on ANC–SEA	6,681	85.5%	64 min	1.12%	A
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 134 quarter by quarter

Quarter by quarter AS 134 held fairly steady: 76.5% in Jul–Sep 2025, 82.3% in Oct–Dec 2025 and 85.1% in Jan–Mar 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202585 flights76.5%
Oct–Dec 202563 flights82.3%
Jan–Mar 202688 flights85.1%
Apr–Jun 202618 flights—

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, AS 134 did best on Tuesday at 89.7% on time and worst on Monday at 68.4%. Each day rests on about 36 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 134 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 2,730 reported delay minutes.

Late-arriving aircraft
38%
Carrier
30%
National Airspace System
17%
Extreme weather
14%
Security
1%

Extreme weather accounts for 14% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.2 times the usual weather exposure. The split is drawn from 2,730 delay minutes reported on AS 134.

Cancellations are rare at 0.79%, 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

6.7% 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 1,448 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.

Every one of the 254 flights under AS 134 in the data flew ANC to SEA. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 254 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 134

For a booking, read AS 134 as 81.7% on time with 0.79% cancelled over 254 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