Flight number record

AS 606

Alaska Airlines · Seattle to Phoenix

Route: SEA → PHX
Departs: 07:55
Flights: 323
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 606, check with Alaska Airlines.

AS 606 earns an A. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs roughly 45 minutes. That rests on 323 flights, with a median arrival 11 minutes early.

Set against the rest of the country, AS 606's record is 10 points better than the US average of 77.6%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.

On time

87.7%

Arrivals under 15 minutes late, of 318 completed flights

Avg delay

47 min

Across delayed arrivals only, not all flights

Cancelled

1.24%

National rate is 1.81%

1 hour+ late

0.9%

National rate is 8.1%

These figures cover 323 flights between July 2025 and June 2026. The median arrival is 11 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 606 flies

AS 606 flies SEA to PHX without a single fixed slot. Its most common scheduled departure was 07:55, used on 61 of 323 flights, with 08:15 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:5561 flights18.9%
Departs 08:1534 flights10.5%

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 07:55 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AS 606 runs level with that at 87.7%. 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 606 next to SEA to PHX

Every carrier on SEA to PHX combined arrived on time 79.2% of the time across 7,268 flights, so AS 606 is 9 points ahead of it. Alaska flew 2,906 flights on the same city pair under all its flight numbers, including this one, and those ran 79.0% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 9 points.

AS 606 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 606thin sample	323	87.7%	47 min	1.24%	A
All Alaska Airlines on SEA–PHX	2,906	79.0%	45 min	0.65%	B+
All carriers on SEA–PHX	7,268	79.2%	56 min	0.70%	B+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 606 quarter by quarter

AS 606 did not run the same all year. Its best quarter was Apr–Jun 2026 at 96.8% on time and its weakest Oct–Dec 2025 at 76.9%, a swing of 20 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 202590 flights92.1%
Oct–Dec 202592 flights76.9%
Jan–Mar 202678 flights88.2%
Apr–Jun 202663 flights96.8%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, AS 606 did best on Tuesday at 94.0% on time and worst on Monday at 81.2%. Each day rests on about 46 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 606 runs late

One category carries most of the weight here. Carrier accounts for 53% of the 1,817 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
53%
National Airspace System
34%
Late-arriving aircraft
11%
Extreme weather
2%

The largest share of delay minutes, 53%, 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 960 of the 1,817 delay minutes reported here. The split is drawn from 1,817 delay minutes reported on AS 606.

Cancellations sit at 1.24% against a national 1.81%, which is ordinary. Diversions add another 0.31%.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 0.9% 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.

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 323 flights under AS 606 in the data flew SEA to PHX. 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. 323 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 606

For a booking, AS 606 has one of the better records a US domestic flight can show: 87.7% on time and 1.24% cancelled. That is a base rate, not a promise about any single 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