Flight number record
AS 629
Alaska Airlines · Las Vegas to Seattle
- Route
- LAS → SEA
- Departs
- 10:14
- Flights
- 353
- Period
- July 2025 to June 2026
Historical statistics for July 2025 to June 2026, not live status. For today’s AS 629, check with Alaska Airlines.
AS 629 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 an hour and a half. That rests on 353 flights, with a median arrival 8 minutes early.
Set against the rest of the country, AS 629's record is 10 points better than the US average of 77.6%. That gap is worth roughly 104 fewer late arrivals for every thousand flights.
Key figures
On time
88.0%
Arrivals under 15 minutes late, of 351 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
0.57%
National rate is 1.81%
1 hour+ late
3.4%
National rate is 8.1%
These figures cover 353 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 629 flies
AS 629 flies LAS to SEA without a single fixed slot. Its most common scheduled departure was 10:14, used on 50 of 353 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.
- Departs 10:1450 flights14.2%
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 10:14 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and AS 629 runs 4 points better at 88.0%. 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 629 next to LAS to SEA
Every carrier on LAS to SEA combined arrived on time 82.3% of the time across 5,649 flights, so AS 629 is 6 points ahead of it. Alaska flew 2,638 flights on the same city pair under all its flight numbers, including this one, and those ran 82.8% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 629thin sample | 353 | 88.0% | 88 min | 0.57% | A+ |
| All Alaska Airlines on LAS–SEA | 2,638 | 82.8% | 64 min | 1.25% | B |
| All carriers on LAS–SEA | 5,649 | 82.3% | 63 min | 0.94% | B+ |
| Alaska Airlines, whole network | 293,372 | 79.1% | 52 min | 1.28% | B |
Across the year
AS 629 quarter by quarter
Quarter by quarter AS 629 held fairly steady: 85.9% in Jul–Sep 2025, 83.1% in Oct–Dec 2025, 91.1% in Jan–Mar 2026 and 92.3% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202592 flights85.9%
- Oct–Dec 202590 flights83.1%
- Jan–Mar 202680 flights91.1%
- Apr–Jun 202691 flights92.3%
Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.
By weekday, AS 629 ranged from 80.8% on Monday to 92.5% on Tuesday. With about 50 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.
Delay causes
Why AS 629 runs late
One category carries most of the weight here. Carrier accounts for 45% of the 3,688 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.
- 45%Carrier
- 41%Late-arriving aircraft
- 9%National Airspace System
- 5%Extreme weather
- 0%Security
41% 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 3,688 reported delay minutes here, that single category outweighs weather by 9 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 3,688 delay minutes reported on AS 629.
Cancellations are rare at 0.57%, 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
Badly late arrivals are rare here: only 3.4% 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 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.
Every one of the 353 flights under AS 629 in the data flew LAS 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. 353 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 629
For a booking, AS 629 has one of the better records a US domestic flight can show: 88.0% on time and 0.57% cancelled. That is a base rate, not a promise about any single day.
Related
Where to go next
- LAS to SEA, every carrier and departure
- SEA to LAS, the return direction
- Delta Air Lines 2844 on the same route95.9%
- Alaska Airlines 676 on the same route74.9%
- Alaska Airlines 479 on the same route81.7%
- Delta Air Lines 2880 on the same route83.4%
- Alaska Airlines 552 on the same route82.4%
- Alaska Airlines 701 on the same route95.8%
- Harry Reid International (LAS) delay statistics
- Seattle-Tacoma International (SEA) delay statistics
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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.