Flight number record

AS 681

Alaska Airlines · Seattle to Sacramento

Route: SEA → SMF
Departs: 14:16
Flights: 278
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s AS 681, check with Alaska Airlines.

AS 681 lands a B+, 5 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by roughly 40 minutes on average. That rests on 278 flights, with a median arrival 3 minutes early.

Set against the rest of the country, AS 681's record is 5 points better than the US average of 77.3%. That gap is worth roughly 46 fewer late arrivals for every thousand flights.

On time

81.9%

Arrivals under 15 minutes late, of 276 completed flights

Avg delay

42 min

Across delayed arrivals only, not all flights

Cancelled

0.72%

National rate is 1.89%

1 hour+ late

2.9%

National rate is 8.3%

These figures cover 278 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 681 flies

AS 681 flies SEA to SMF without a single fixed slot. Its most common scheduled departure was 14:16, used on 50 of 278 flights, with 12:07 (36 flights) and 12:17 (35 flights) next.

Departs 14:1650 flights18.0%
Departs 12:0736 flights12.9%
Departs 12:1735 flights12.6%

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 14:16 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and AS 681 runs 10 points better at 81.9%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

AS 681 next to SEA to SMF

Every carrier on SEA to SMF combined arrived on time 82.1% of the time across 4,387 flights, so AS 681 is about level with it. Alaska flew 1,409 flights on the same city pair under all its flight numbers, including this one, and those ran 80.2% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 2 points.

AS 681 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 681thin sample	278	81.9%	42 min	0.72%	B+
All Alaska Airlines on SEA–SMF	1,409	80.2%	44 min	0.57%	B+
All carriers on SEA–SMF	4,387	82.1%	51 min	0.39%	B+
Alaska Airlines, whole network	309,844	79.7%	52 min	1.20%	B

Across the year

AS 681 quarter by quarter

AS 681 did not run the same all year. Its best quarter was Jan–Mar 2026 at 90.2% on time and its weakest Jul–Sep 2026 at 66.0%, a swing of 24 points on roughly 70 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.

Oct–Dec 202562 flights72.6%
Jan–Mar 202683 flights90.2%
Apr–Jun 202685 flights89.4%
Jul–Sep 202648 flights66.0%

Scale runs 60% to 95%.

By weekday, AS 681 did best on Wednesday at 96.9% on time and worst on Sunday at 71.1%. Each day rests on about 40 flights, so a gap of 26 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late AS 681 runs when it is late

Most of the lateness is short. 25 of the 50 late arrivals were under half an hour behind, and 8 reached an hour or more.

15+ min early54 flights19.6%
Within 15 min172 flights62.3%
15–29 min late25 flights9.1%
30–59 min late17 flights6.2%
1–2 hours late6 flights2.2%
2+ hours late2 flights0.7%

Scale runs 0% to 100%.

Share of 276 completed flights by arrival against schedule.

A late pushback is often recovered here: of 60 departures that left 15 minutes late or more, 21 still arrived on time. 11 flights left on time and still arrived late.

The worst days

Worst days for AS 681

The latest arrival of the period was on 26 April 2026, 4 hours 59 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.

The latest arrivals of AS 681 in the period
Date	Arrived late by	Largest filed cause
26 April 2026	4 hours 59 minutes	Carrier
10 May 2026	2 hours 36 minutes	Carrier
3 January 2026	1 hour 45 minutes	Late-arriving aircraft
20 December 2025	1 hour 28 minutes	Late-arriving aircraft
31 July 2026	1 hour 12 minutes	Carrier

Delay causes

Why AS 681 runs late

Carrier accounts for 49% of the 2,120 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
49%
Late-arriving aircraft
37%
National Airspace System
13%
Extreme weather
1%

37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,120 reported delay minutes here, that single category outweighs weather by 37 to one. The split is drawn from 2,120 delay minutes reported on AS 681.

Cancellations are rare at 0.72%, 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 2.9% 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.

The 605 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.

Every one of the 278 flights under AS 681 in the data flew SEA to SMF. 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. 278 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 681

For a booking, read AS 681 as 81.9% on time with 0.72% cancelled over 278 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