Flight number record

AS 460

Alaska Airlines · Seattle to Boston

Route: SEA → BOS
Departs: 15:59
Flights: 359
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 460, check with Alaska Airlines.

AS 460 lands a B, about a point 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 roughly 45 minutes on average. That is a workable record, not a spotless one. That rests on 359 flights, with a median arrival 8 minutes early.

On time

78.4%

Arrivals under 15 minutes late, of 352 completed flights

Avg delay

44 min

Across delayed arrivals only, not all flights

Cancelled

1.11%

National rate is 1.81%

1 hour+ late

4.8%

National rate is 8.1%

These figures cover 359 flights between July 2025 and June 2026. The median arrival is 8 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 460 flies

AS 460 flies SEA to BOS without a single fixed slot. Its most common scheduled departure was 15:59, used on 87 of 359 flights, with 15:38 (51 flights) and 15:43 (50 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:5987 flights24.2%
Departs 15:3851 flights14.2%
Departs 15:4350 flights13.9%

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 15:59 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and AS 460 runs 6 points better at 78.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

AS 460 next to SEA to BOS

Every carrier on SEA to BOS combined arrived on time 74.5% of the time across 2,459 flights, so AS 460 is 4 points ahead of it. Alaska flew 1,207 flights on the same city pair under all its flight numbers, including this one, and those ran 73.7% on time. Across its whole network Alaska Airlines managed 79.1%, close to this flight's figure.

AS 460 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 460thin sample	359	78.4%	44 min	1.11%	B
All Alaska Airlines on SEA–BOS	1,207	73.7%	48 min	0.99%	C+
All carriers on SEA–BOS	2,459	74.5%	68 min	1.14%	C
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 460 quarter by quarter

AS 460 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.4% on time and its weakest Jul–Sep 2025 at 57.6%, a swing of 31 points on roughly 90 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 flights57.6%
Oct–Dec 202587 flights85.5%
Jan–Mar 202689 flights88.4%
Apr–Jun 202691 flights83.5%

Scale runs 50% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, AS 460 did best on Wednesday at 86.5% on time and worst on Monday at 69.4%. Each day rests on about 51 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 460 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 44% of the 3,321 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
44%
National Airspace System
26%
Carrier
25%
Extreme weather
5%

44% 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 3,321 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 3,321 delay minutes reported on AS 460.

Cancellations sit at 1.11% against a national 1.81%, which is ordinary. Diversions add another 0.84%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 4.8% 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 2,496 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.

Every one of the 359 flights under AS 460 in the data flew SEA to BOS. 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. 359 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 460

For a booking, read AS 460 as 78.4% on time with 1.11% cancelled over 359 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