Flight number record

AS 611

Alaska Airlines · Phoenix to Seattle

Route: PHX → SEA
Departs: 17:29
Flights: 325
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 611, check with Alaska Airlines.

AS 611 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 roughly 55 minutes on average. That is a workable record, not a spotless one. That rests on 325 flights, with a median arrival 6 minutes early.

On time

79.8%

Arrivals under 15 minutes late, of 322 completed flights

Avg delay

53 min

Across delayed arrivals only, not all flights

Cancelled

0.92%

National rate is 1.81%

1 hour+ late

4.0%

National rate is 8.1%

These figures cover 325 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 611 flies

AS 611 flies PHX to SEA without a single fixed slot. Its most common scheduled departure was 17:29, used on 49 of 325 flights, with 19:35 (43 flights) and 18:17 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:2949 flights15.1%
Departs 19:3543 flights13.2%
Departs 18:1735 flights10.8%

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 17:29 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and AS 611 runs 12 points better at 79.8%. 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 611 next to PHX to SEA

Every carrier on PHX to SEA combined arrived on time 82.7% of the time across 7,269 flights, so AS 611 is 3 points behind it. Alaska flew 2,903 flights on the same city pair under all its flight numbers, including this one, and those ran 84.9% on time. Across its whole network Alaska Airlines managed 79.1%, close to this flight's figure.

AS 611 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 611thin sample	325	79.8%	53 min	0.92%	B+
All Alaska Airlines on PHX–SEA	2,903	84.9%	56 min	0.76%	B+
All carriers on PHX–SEA	7,269	82.7%	55 min	0.65%	B+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 611 quarter by quarter

AS 611 did not run the same all year. Its best quarter was Jan–Mar 2026 at 87.5% on time and its weakest Jul–Sep 2025 at 64.1%, a swing of 23 points on roughly 81 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 202579 flights64.1%
Oct–Dec 202575 flights80.8%
Jan–Mar 202680 flights87.5%
Apr–Jun 202691 flights85.7%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, AS 611 did best on Sunday at 90.4% on time and worst on Tuesday at 72.7%. Each day rests on about 46 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 611 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 65% of the 3,412 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
65%
National Airspace System
18%
Carrier
11%
Extreme weather
5%

65% 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 3,412 reported delay minutes here, that single category outweighs weather by 13 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 3,412 delay minutes reported on AS 611.

Cancellations sit at 0.92% 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 4.0% 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.

The 1,107 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

Every one of the 325 flights under AS 611 in the data flew PHX 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. 325 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 611

For a booking, read AS 611 as 79.8% on time with 0.92% cancelled over 325 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