Flight number record

AS 367

Alaska Airlines · Seattle to Washington

Route: SEA → IAD
Departs: 23:30
Flights: 284
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 367, check with Alaska Airlines.

AS 367 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 50 minutes on average. That is a workable record, not a spotless one. That rests on 284 flights, with a median arrival 6 minutes early.

Set against the rest of the country, AS 367's record is 5 points better than the US average of 77.6%. That gap is worth roughly 54 fewer late arrivals for every thousand flights.

On time

83.0%

Arrivals under 15 minutes late, of 283 completed flights

Avg delay

48 min

Across delayed arrivals only, not all flights

Cancelled

0.00%

National rate is 1.81%

1 hour+ late

3.9%

National rate is 8.1%

These figures cover 284 flights between July 2025 and June 2026. The median arrival is 6 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 367 flies

AS 367 flies SEA to IAD without a single fixed slot. Its most common scheduled departure was 23:30, used on 122 of 284 flights, with 21:40 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 23:30122 flights43.0%
Departs 21:4035 flights12.3%

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 23:30 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and AS 367 runs 13 points better at 83.0%. 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 367 next to SEA to IAD

Every carrier on SEA to IAD combined arrived on time 81.9% of the time across 1,886 flights, so AS 367 is about level with it. Alaska flew 835 flights on the same city pair under all its flight numbers, including this one, and those ran 80.4% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 4 points.

AS 367 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 367thin sample	284	83.0%	48 min	0.00%	B+
All Alaska Airlines on SEA–IAD	835	80.4%	41 min	0.36%	B+
All carriers on SEA–IAD	1,886	81.9%	60 min	0.64%	B+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 367 quarter by quarter

Quarter by quarter AS 367 held fairly steady: 80.2% in Jul–Sep 2025, 87.0% in Oct–Dec 2025, 84.6% in Jan–Mar 2026 and 82.1% in Apr–Jun 2026. A spread of 7 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights80.2%
Oct–Dec 202569 flights87.0%
Jan–Mar 202639 flights84.6%
Apr–Jun 202685 flights82.1%

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

By weekday, AS 367 did best on Wednesday at 91.4% on time and worst on Sunday at 71.7%. Each day rests on about 41 flights, so a gap of 20 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 367 runs late

One category carries most of the weight here. Carrier accounts for 49% of the 2,285 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.

Carrier
49%
Late-arriving aircraft
43%
National Airspace System
7%
Security
1%

43% 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 2,285 reported delay minutes here, that single category outweighs weather by 43 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 2,285 delay minutes reported on AS 367.

Cancellations are rare at 0.00%, below the national 1.81% and low enough to earn the plus on the grade. Almost no flights are 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 3.9% 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 2,305 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 one other city pair in the data, including GEG to SEA (1), but none flew often enough under AS 367 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to IAD only.

One caution: this is a thin sample. 284 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 367

For a booking, read AS 367 as 83.0% on time with 0.00% cancelled over 284 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