Flight number record

AS 563

Alaska Airlines · Kansas City to Seattle

Route: MCI → SEA
Departs: 07:00
Flights: 282
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 563, check with Alaska Airlines.

AS 563 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 13 points better than the national rate of 77.6%. When something does go wrong the average delay runs close to two hours. That rests on 282 flights, with a median arrival 8 minutes early.

Set against the rest of the country, AS 563's record is 13 points better than the US average of 77.6%. That gap is worth roughly 131 fewer late arrivals for every thousand flights.

On time

90.7%

Arrivals under 15 minutes late, of 279 completed flights

Avg delay

114 min

Across delayed arrivals only, not all flights

Cancelled

1.06%

National rate is 1.81%

1 hour+ late

2.5%

National rate is 8.1%

These figures cover 282 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 563 flies

AS 563 flies MCI to SEA without a single fixed slot. Its most common scheduled departure was 07:00, used on 138 of 282 flights, with 06:45 (44 flights) and 06:15 (32 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 07:00138 flights48.9%
Departs 06:4544 flights15.6%
Departs 06:1532 flights11.3%

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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AS 563 runs level with that at 90.7%. 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 563 next to MCI to SEA

Every carrier on MCI to SEA combined arrived on time 83.4% of the time across 1,131 flights, so AS 563 is 7 points ahead of it. Alaska flew 745 flights on the same city pair under all its flight numbers, including this one, and those ran 83.0% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 12 points.

AS 563 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 563thin sample	282	90.7%	114 min	1.06%	A
All Alaska Airlines on MCI–SEA	745	83.0%	67 min	0.81%	B+
All carriers on MCI–SEA	1,131	83.4%	71 min	1.06%	B
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 563 quarter by quarter

AS 563 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.5% on time and its weakest Oct–Dec 2025 at 82.6%, a swing of 14 points on roughly 94 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 202586 flights96.5%
Oct–Dec 202588 flights82.6%
Jan–Mar 202617 flights—
Apr–Jun 202691 flights93.3%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, AS 563 did best on Monday at 97.6% on time and worst on Friday at 85.4%. Each day rests on about 40 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 563 runs late

One category carries most of the weight here. Carrier accounts for 69% of the 2,955 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
69%
Late-arriving aircraft
20%
National Airspace System
11%

The largest share of delay minutes, 69%, 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 2,053 of the 2,955 delay minutes reported here. The split is drawn from 2,955 delay minutes reported on AS 563.

Cancellations sit at 1.06% 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 2.5% 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 1,490 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 282 flights under AS 563 in the data flew MCI 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. 282 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 563

For a booking, AS 563 has one of the better records a US domestic flight can show: 90.7% on time and 1.06% 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