Flight number record

AS 738

Alaska Airlines · Seattle to Las Vegas

Route: SEA → LAS
Departs: 10:40
Flights: 324
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 738, check with Alaska Airlines.

AS 738 lands a B+, about a point 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 45 minutes on average. That is a workable record, not a spotless one. That rests on 324 flights, with a median arrival 4 minutes early.

On time

78.6%

Arrivals under 15 minutes late, of 323 completed flights

Avg delay

45 min

Across delayed arrivals only, not all flights

Cancelled

0.31%

National rate is 1.81%

1 hour+ late

5.0%

National rate is 8.1%

These figures cover 324 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 738 flies

AS 738 flies SEA to LAS without a single fixed slot. Its most common scheduled departure was 10:40, used on 50 of 324 flights, with 10:25 (42 flights) and 12:03 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:4050 flights15.4%
Departs 10:2542 flights13.0%
Departs 12:0336 flights11.1%

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 10:40 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and AS 738 runs 6 points worse at 78.6%. 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 738 next to SEA to LAS

Every carrier on SEA to LAS combined arrived on time 77.7% of the time across 5,650 flights, so AS 738 is about level with it. Alaska flew 2,638 flights on the same city pair under all its flight numbers, including this one, and those ran 78.0% on time. Across its whole network Alaska Airlines managed 79.1%, close to this flight's figure.

AS 738 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 738thin sample	324	78.6%	45 min	0.31%	B+
All Alaska Airlines on SEA–LAS	2,638	78.0%	47 min	0.91%	B+
All carriers on SEA–LAS	5,650	77.7%	54 min	0.83%	B+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 738 quarter by quarter

AS 738 did not run the same all year. Its best quarter was Jan–Mar 2026 at 82.6% on time and its weakest Jul–Sep 2025 at 72.5%, a swing of 10 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 202591 flights72.5%
Oct–Dec 202584 flights79.5%
Jan–Mar 202686 flights82.6%
Apr–Jun 202663 flights81.0%

Scale runs 65% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, AS 738 did best on Sunday at 85.4% on time and worst on Wednesday at 68.3%. Each day rests on about 46 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 738 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 3,091 reported delay minutes.

Carrier
35%
National Airspace System
29%
Late-arriving aircraft
28%
Extreme weather
7%
Security
1%

The largest share of delay minutes, 35%, 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 1,086 of the 3,091 delay minutes reported here. The split is drawn from 3,091 delay minutes reported on AS 738.

Cancellations are rare at 0.31%, 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

5.0% 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 45 minutes, which a normal layover absorbs.

The 867 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.

The same number turns up on one other city pair in the data, including ANC to LAX (1), but none flew often enough under AS 738 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to LAS only.

One caution: this is a thin sample. 324 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 738

For a booking, read AS 738 as 78.6% on time with 0.31% cancelled over 324 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