Flight number record

AS 418

Alaska Airlines · Kansas City to Seattle

Route: MCI → SEA
Departs: 14:17
Flights: 308
Period: September 2025 to August 2026

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

AS 418 lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That rests on 308 flights, with a median arrival 6 minutes early.

Set against the rest of the country, AS 418's record is 6 points better than the US average of 77.3%. That gap is worth roughly 60 fewer late arrivals for every thousand flights.

On time

83.3%

Arrivals under 15 minutes late, of 305 completed flights

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

0.32%

National rate is 1.89%

1 hour+ late

5.2%

National rate is 8.3%

These figures cover 308 flights between September 2025 and August 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.

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Schedule

When AS 418 flies

AS 418 flies MCI to SEA without a single fixed slot. Its most common scheduled departure was 14:17, used on 69 of 308 flights, with 15:37 (33 flights) next.

Departs 14:1769 flights22.4%
Departs 15:3733 flights10.7%

Scale runs 0% to 100%.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 14:17 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and AS 418 runs 11 points better at 83.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

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Against the route

AS 418 next to MCI to SEA

Every carrier on MCI to SEA combined arrived on time 85.0% of the time across 1,126 flights, so AS 418 is 2 points behind it. Alaska flew 745 flights on the same city pair under all its flight numbers, including this one, and those ran 84.7% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 4 points.

AS 418 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 418thin sample	308	83.3%	55 min	0.32%	B+
All Alaska Airlines on MCI–SEA	745	84.7%	63 min	0.67%	B+
All carriers on MCI–SEA	1,126	85.0%	65 min	0.98%	A+
Alaska Airlines, whole network	309,844	79.7%	52 min	1.20%	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 202530 flights—
Oct–Dec 202571 flights61.4%
Jan–Mar 202686 flights90.6%
Apr–Jun 202659 flights98.3%
Jul–Sep 202662 flights88.7%

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

By weekday, AS 418 did best on Tuesday at 92.7% on time and worst on Friday at 71.1%. Each day rests on about 44 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late AS 418 runs when it is late

AS 418 often beats the schedule: 84 of 305 completed flights, 28%, arrived 15 minutes or more early. The 51 late arrivals split 21 under half an hour, 14 between 30 and 60 minutes, and 16 an hour or more.

15+ min early84 flights27.5%
Within 15 min170 flights55.7%
15–29 min late21 flights6.9%
30–59 min late14 flights4.6%
1–2 hours late11 flights3.6%
2+ hours late5 flights1.6%

Scale runs 0% to 100%.

Share of 305 completed flights by arrival against schedule.

7 of 41 late departures made up the time and arrived on time, 17% of them. In the other direction, 17 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at SEA.

The worst days

Worst days for AS 418

The latest arrival of the period was on 13 March 2026, 3 hours 36 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across March, September, December, November and August, with no single month standing out.

The latest arrivals of AS 418 in the period
Date	Arrived late by	Largest filed cause
13 March 2026	3 hours 36 minutes	Extreme weather
26 September 2025	3 hours 13 minutes	Late-arriving aircraft
1 December 2025	2 hours 54 minutes	Extreme weather
14 November 2025	2 hours 33 minutes	Late-arriving aircraft
24 August 2026	2 hours 11 minutes	Carrier

Delay causes

Why AS 418 runs late

Late-arriving aircraft accounts for 52% of the 2,802 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
52%
National Airspace System
19%
Carrier
17%
Extreme weather
12%

Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 2.0 times the usual weather exposure. The split is drawn from 2,802 delay minutes reported on AS 418.

Cancellations are rare at 0.32%, below the national 1.89% 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

5.2% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about 55 minutes, 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.

AS 418 is not only a MCI to SEA flight. It also flew SEA to MCI (299 flights, 88.9% 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. 308 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	299	88.9%	56 min	0.33%	A+

What to do with this

Booking AS 418

For a booking, read AS 418 as 83.3% on time with 0.32% cancelled over 308 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures