Flight number record

AS 334

Alaska Airlines · Seattle to Atlanta

Route: SEA → ATL
Departs: 09:28
Flights: 315
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 334, check with Alaska Airlines.

AS 334 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 45 minutes. That rests on 315 flights, with a median arrival 8 minutes early.

Set against the rest of the country, AS 334's record is 7 points better than the US average of 77.6%. That gap is worth roughly 73 fewer late arrivals for every thousand flights.

On time

84.9%

Arrivals under 15 minutes late, of 312 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

0.32%

National rate is 1.81%

1 hour+ late

2.6%

National rate is 8.1%

These figures cover 315 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 334 flies

AS 334 flies SEA to ATL without a single fixed slot. Its most common scheduled departure was 09:28, used on 41 of 315 flights, with 07:55 (36 flights) and 10:13 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:2841 flights13.0%
Departs 07:5536 flights11.4%
Departs 10:1335 flights11.1%

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 09:28 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and AS 334 runs level with that at 84.9%. 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 334 next to SEA to ATL

Every carrier on SEA to ATL combined arrived on time 82.8% of the time across 3,276 flights, so AS 334 is 2 points ahead of it. Alaska flew 905 flights on the same city pair under all its flight numbers, including this one, and those ran 80.3% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 6 points.

AS 334 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 334thin sample	315	84.9%	45 min	0.32%	B+
All Alaska Airlines on SEA–ATL	905	80.3%	46 min	0.66%	B+
All carriers on SEA–ATL	3,276	82.8%	73 min	0.55%	B+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 334 quarter by quarter

AS 334 did not run the same all year. Its best quarter was Jul–Sep 2025 at 95.2% on time and its weakest Oct–Dec 2025 at 75.8%, a swing of 19 points on roughly 79 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 202542 flights95.2%
Oct–Dec 202592 flights75.8%
Jan–Mar 202690 flights91.1%
Apr–Jun 202691 flights83.1%

Scale runs 65% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, AS 334 did best on Wednesday at 93.2% on time and worst on Saturday at 75.6%. Each day rests on about 45 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 334 runs late

One category carries most of the weight here. Carrier accounts for 49% of the 2,093 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
29%
National Airspace System
20%
Extreme weather
3%

The largest share of delay minutes, 49%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,018 of the 2,093 delay minutes reported here. The split is drawn from 2,093 delay minutes reported on AS 334.

Cancellations are rare at 0.32%, below the national 1.81% 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 2.6% 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 2,182 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 ATL to SEA (49), but none flew often enough under AS 334 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to ATL only.

One caution: this is a thin sample. 315 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 334

For a booking, read AS 334 as 84.9% on time with 0.32% cancelled over 315 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