Flight profile · Alaska Airlines
AS629
Las Vegas (LAS) to Seattle (SEA) · scheduled 7:00 AM – 9:53 AM
How AS629 performs
988 operations, July 2023 – July 2026.
AS629 arrived on time 85.1% of the time, against 80.2% for all LAS → SEA flights, so this departure is 4.9 percentage points better than the route as a whole. Against Alaska Airlines’ own flights on this route it is 5.7 points better.
AS629’s scheduled departure has moved during the period FlyerIntel has on file: it typically left around 7:00 AM earlier on, and around 10:15 AM more recently — a 195-minute shift, not the few minutes of day-to-day rounding every published schedule carries. Confirm the current departure time before booking around an older listing.
Source: US DOT Bureau of Transportation Statistics · 988 operations, July 2023 – July 2026 · If AS629 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where AS629 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
Ask for the position of AS629 right now, if receivers on the ground are hearing it. Nothing is requested until you press the button.
Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| AS629 | 85.1% | 0.91% | -10 min | 5.0% | 988 |
| Alaska Airlines on LAS → SEA | 79.4% | 1.18% | -5 min | 5.7% | 8,339 |
| All LAS → SEA flights | 80.2% | 0.82% | -7 min | 5.4% | 19,214 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why AS629 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
weather severe enough to stop this flight specifically
screening or terminal security incidents
Share of the delay minutes US DOT attributed to each cause for AS629 on LAS → SEA. Only delays of 15 minutes or more are attributed.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Does a late aircraft delay this flight?
How often the plane that flies AS629 comes in late, and what that does to the departure.
AS629 is usually the aircraft’s first flight of the day: the schedule gives it a median of 7 hours on the ground at LAS, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, AS629 pushed back an average of 24 minutes late; when it came in on time or early, an average of 0 minutes late.
Each departure is matched to the flight the same aircraft flew into LAS just before it, using the tail number in the DOT file, 869 of 980 departures in all. A departure is left out when that flight is unknown, was cancelled or diverted, or the aircraft had sat for more than 12 hours. A flight the airline cancelled never left and is not in the count, and one flown by a substitute aircraft is matched to the aircraft that flew it, not to the one first planned.
Against the network at the same turn length
| Share of departures | Inbound landed 15+ late | Left 15+ late after a late inbound | Left 15+ late after an on-time inbound |
|---|---|---|---|
| AS629 | 20% | 40% | 9% |
| Network, same turn | 29% | 12% | 9% |
A night on the ground absorbs most of a late arrival, so a late inbound matters far less on a turn this long than on a same-day one.
The network row is every flight with a scheduled turn of 6 hours or more, usually overnight. How often AS629’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often AS629 left 15 or more minutes late is higher than the network’s.
More: Which Flight Numbers Pay for a Late Aircraft lists the flight numbers that pass a late aircraft on.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
From pushback to gate
When it leaves LAS late, does that still matter by the time it reaches SEA?
AS629 pushes back an average of 11.7 minutes late and reaches the gate at SEA an average of 4.7 minutes late. The 6.9 minutes between those two figures are slack the published schedule already carries, which is why a late pushback on this flight does not reliably become a late arrival. It spends 20.2 minutes on the taxiways at LAS, 2.7 minutes longer than a typical LAS departure in the same hour.
On arrival at SEA, AS629 spends 12.1 min taxiing from touchdown to the gate — ground time a connecting passenger sits through before they can even leave the aircraft, on top of however late the flight itself ran. That is about what any arrival at SEA spends on the ground before reaching the gate.
Departure delay is averaged over every pushback and arrival delay over every completed arrival, so the two counts differ by the flights that never reached SEA. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 38,794 departures from LAS scheduled in the clock hour AS629 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at SEA (510,187 flights), not just AS629’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves LAS
Part of any flight’s record belongs to the clock rather than to the flight. AS629 has one departure time, so this is what that time is worth.
On-time arrival rate. 38,794 departures from LAS are scheduled in the 7 AM–8 AM hour over the period, against 569,617 across the whole day.
AS629 is scheduled out of LAS at 7:00 AM, in the 7 AM–8 AM bank. Departures from LAS in that hour arrive on time 88.3% of the time against 78.0% across the airport’s whole day — the slot alone is worth 10.3 points better before anything about this particular flight is considered.
The two airport figures cover every departure from LAS to every destination, so they describe the slot rather than this journey — the like-for-like comparison against the route is above. Hours are scheduled local, and a number whose schedule moved between banks inside the period has no single hour and is not described here at all. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Hours below 120 departures are not scored.
By day of week
Does AS629 run worse on particular days?
Tuesday is historically the most reliable day and Friday the least, a gap of 10.5 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Days with fewer than 120 operations are not scored.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
24 min late
against a median of 10 min early
Percentiles over 988 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – July 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| DL2844 | Delta Air Lines | 95.4% | 12 min early | 1,036 |
| DL2922 | Delta Air Lines | 91.7% | 16 min early | 600 |
| AS629 this flight | Alaska Airlines | 85.1% | 10 min early | 988 |
| DL2880 | Delta Air Lines | 84.6% | 13 min early | 674 |
| AS741 | Alaska Airlines | 82.3% | 5 min early | 769 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. AS629 is placed in the same ordering rather than left out of it; the rows around it are the most punctual departures on the route, not all of them, so this is a comparison and not a rank. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 988 records of AS629 operating LAS → SEA, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
Full methodology · Data sources · Report a problem
Related research: Most and Least Reliable Flight Numbers · The Delay You Inherit · Making Up Time in the Air
Analysis last recomputed