Flight number record

AS 161

Alaska Airlines · Seattle to Eugene

Route: SEA → EUG
Departs: 23:10
Flights: 254
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 161, check with Alaska Airlines.

AS 161 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.6%. The late ones land roughly 35 minutes behind schedule. That rests on 254 flights, with a median arrival 3 minutes early.

On time

74.8%

Arrivals under 15 minutes late, of 250 completed flights

Avg delay

37 min

Across delayed arrivals only, not all flights

Cancelled

1.57%

National rate is 1.81%

1 hour+ late

3.6%

National rate is 8.1%

These figures cover 254 flights between July 2025 and June 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.

Schedule

When AS 161 flies

AS 161 flies SEA to EUG without a single fixed slot. Its most common scheduled departure was 23:10, used on 50 of 254 flights, with 22:47 (45 flights) and 20:15 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 23:1050 flights19.7%
Departs 22:4745 flights17.7%
Departs 20:1537 flights14.6%

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 23:10 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and AS 161 runs 4 points better at 74.8%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

AS 161 next to SEA to EUG

Every carrier on SEA to EUG combined arrived on time 84.4% of the time across 1,951 flights, so AS 161 is 10 points behind it. Alaska flew 389 flights on the same city pair under all its flight numbers, including this one, and those ran 73.2% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight trails by 4 points.

AS 161 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 161thin sample	254	74.8%	37 min	1.57%	C
All Alaska Airlines on SEA–EUG	389	73.2%	43 min	1.03%	C
All carriers on SEA–EUG	1,951	84.4%	55 min	1.28%	B
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 161 quarter by quarter

AS 161 did not run the same all year. Its best quarter was Jan–Mar 2026 at 87.8% on time and its weakest Jul–Sep 2025 at 66.3%, a swing of 22 points on roughly 85 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 202590 flights66.3%
Oct–Dec 202589 flights72.4%
Jan–Mar 202675 flights87.8%

Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, AS 161 did best on Saturday at 81.1% on time and worst on Monday at 64.9%. Each day rests on about 36 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 161 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 66% of the 2,358 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
66%
Carrier
25%
National Airspace System
7%
Extreme weather
1%

66% 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 2,358 reported delay minutes here, that single category outweighs weather by 66 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 2,358 delay minutes reported on AS 161.

Cancellations sit at 1.57% 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 3.6% 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.

Every one of the 254 flights under AS 161 in the data flew SEA to EUG. 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 161

For a booking, AS 161 is one of the weaker ways to fly SEA to EUG: 10 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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