Flight number record

AS 418

Alaska Airlines · Kansas City to Seattle

Route: MCI → SEA
Departs: 15:37
Flights: 307
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 418, check with Alaska Airlines.

AS 418 lands a B+, 3 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 an hour on average. That is a workable record, not a spotless one. That rests on 307 flights, with a median arrival 4 minutes early.

On time

80.2%

Arrivals under 15 minutes late, of 303 completed flights

Avg delay

56 min

Across delayed arrivals only, not all flights

Cancelled

0.65%

National rate is 1.81%

1 hour+ late

6.3%

National rate is 8.1%

These figures cover 307 flights between July 2025 and June 2026. The median arrival is 4 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 418 flies

AS 418 flies MCI to SEA without a single fixed slot. Its most common scheduled departure was 15:37, used on 45 of 307 flights, with 15:34 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:3745 flights14.7%
Departs 15:3443 flights14.0%

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 15:37 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and AS 418 runs 8 points better at 80.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

AS 418 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 418 is 3 points behind 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%, close to this flight's figure.

AS 418 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 418thin sample	307	80.2%	56 min	0.65%	B+
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 418 quarter by quarter

AS 418 did not run the same all year. Its best quarter was Apr–Jun 2026 at 98.3% on time and its weakest Oct–Dec 2025 at 61.4%, a swing of 37 points on roughly 77 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 202591 flights73.0%
Oct–Dec 202571 flights61.4%
Jan–Mar 202686 flights90.6%
Apr–Jun 202659 flights98.3%

Scale runs 55% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, AS 418 did best on Tuesday at 90.2% on time and worst on Friday at 68.9%. Each day rests on about 44 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 418 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 59% of the 3,386 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
59%
National Airspace System
22%
Extreme weather
10%
Carrier
10%

59% 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 3,386 reported delay minutes here, that single category outweighs weather by 6 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 3,386 delay minutes reported on AS 418.

Cancellations are rare at 0.65%, 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

6.3% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

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.

AS 418 is not only a MCI to SEA flight. It also flew SEA to MCI (305 flights, 86.5% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 307 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.

Other routes flown as AS 418
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
SEA to MCIthin sample	305	86.5%	57 min	0.33%	A+

What to do with this

Booking AS 418

For a booking, read AS 418 as 80.2% on time with 0.65% cancelled over 307 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