Flight number record

AS 1

Alaska Airlines · Washington to Seattle

Route: DCA → SEA
Departs: 08:00
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 1, check with Alaska Airlines.

AS 1 lands a B, 2 points 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 about 45 minutes on average. That is a workable record, not a spotless one. That rests on 365 flights, with a median arrival 8 minutes early.

On time

80.0%

Arrivals under 15 minutes late, of 360 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

1.10%

National rate is 1.81%

1 hour+ late

3.6%

National rate is 8.1%

These figures cover 365 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 1 flies

AS 1 is scheduled to leave Washington (DCA) at 08:00 local time and reach Seattle (SEA) at 10:56. That slot held for 365 of the 365 scheduled departures in the data, so the figures below describe one steady operation rather than a number that moved around the clock.

Departs 08:00365 flights100.0%

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 08:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and AS 1 runs 4 points worse at 80.0%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

AS 1 next to DCA to SEA

Every carrier on DCA to SEA combined arrived on time 73.2% of the time across 1,094 flights, so AS 1 is 7 points ahead of it. Alaska flew 729 flights on the same city pair under all its flight numbers, including this one, and those ran 76.7% on time. Across its whole network Alaska Airlines managed 79.1%, close to this flight's figure.

AS 1 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 1	365	80.0%	45 min	1.10%	B
All Alaska Airlines on DCA–SEA	729	76.7%	54 min	1.10%	B
All carriers on DCA–SEA	1,094	73.2%	70 min	1.74%	C
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 1 quarter by quarter

AS 1 did not run the same all year. Its best quarter was Apr–Jun 2026 at 92.3% on time and its weakest Oct–Dec 2025 at 69.6%, a swing of 23 points on roughly 91 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 flights82.6%
Oct–Dec 202592 flights69.6%
Jan–Mar 202690 flights75.3%
Apr–Jun 202691 flights92.3%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, AS 1 ranged from 75.0% on Wednesday to 86.3% on Saturday. With about 52 flights behind each day, a spread of 11 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why AS 1 runs late

One category carries most of the weight here. National Airspace System accounts for 71% of the 3,240 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.

National Airspace System
71%
Carrier
17%
Extreme weather
7%
Late-arriving aircraft
6%

71% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 2,293 minutes out of 3,240, against a national NAS share of 21%. The split is drawn from 3,240 delay minutes reported on AS 1.

Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

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.

At 2,329 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 365 flights under AS 1 in the data flew DCA 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. 365 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 1

For a booking, read AS 1 as 80.0% on time with 1.10% cancelled over 365 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