Flight profile · Alaska Airlines
AS472
Seattle (SEA) to St. Louis (STL) · scheduled 6:10 PM – 11:59 PM
How AS472 performs
720 operations, July 2023 – August 2026.
Between its first and last recorded date on SEA → STL, AS472 averaged about 4 operations a week (720 in 1,158 days, cancelled ones included).
AS472 arrived on time 75.7% of the time, against 78.0% for all SEA → STL flights, so this departure is 2.3 percentage points worse than the route as a whole. Against Alaska Airlines’ own flights on this route it is 4.4 points worse.
Source: US DOT Bureau of Transportation Statistics · 720 operations, July 2023 – August 2026 · If AS472 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where AS472 is right now
A live reading, only if you ask for it. It is not part of the reliability record above.
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Against the rest of the route
| Flight or route | On time | Cancelled | Median delay | Severe | Flights |
|---|---|---|---|---|---|
| AS472 | 75.7% | 0.14% | 0 min | 3.9% | 720 |
| Alaska Airlines on SEA → STL | 80.1% | 0.40% | -3 min | 3.1% | 2,527 |
| All SEA → STL flights | 78.0% | 0.39% | -2 min | 3.5% | 2,827 |
AS472 cancelled 1 of 720 operations (0.14%), close to the 0.39% for SEA → STL.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
Why AS472 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
Share of the delay minutes US DOT attributed to each cause for AS472 on SEA → STL. Only delays of 15 minutes or more are attributed. What the five causes mean
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
Does a late aircraft delay this flight?
How often the plane that flies AS472 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, AS472 pushed back an average of 23 minutes late; when it came in on time or early, an average of 2 minutes late.
Matched by tail number to the aircraft’s previous flight into SEA: 680 of 720 departures. Unknown, cancelled or diverted inbounds and gaps over 12 hours are left out.
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 |
|---|---|---|---|
| AS472 | 22% | 50% | 13% |
| Network, same turn | 17% | 69% | 9% |
69 scheduled minutes is enough to clean and board when the aircraft is on time, with little to spare when it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often AS472’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often AS472 left 15 or more minutes late is lower than the network’s.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
From pushback to gate
When it leaves SEA late, does that still matter by the time it reaches STL?
AS472 pushes back an average of 9.2 minutes late and reaches the gate at STL an average of 6.7 minutes late. The 2.4 minutes between those two figures are slack the published schedule already carries, so a late pushback is partly, not fully, made up before the gate. It spends 23.4 minutes on the taxiways at SEA, 2.7 minutes longer than a typical SEA departure in the same hour.
On arrival at STL, AS472 spends 7.7 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 1.8 minutes longer than a typical STL arrival (5.9 min).
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 22,218 SEA departures. Taxi-in is landing to gate, set against 203,976 arrivals at STL. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
The hour it leaves SEA
AS472 has one departure time, 6:10 PM, so this is what that hour at SEA is worth.
On-time arrival rate. 22,218 departures from SEA are scheduled in the 6 PM–7 PM hour over the period, against 526,113 across the whole day.
AS472 is scheduled out of SEA at 6:10 PM, in the 6 PM–7 PM bank. Departures from SEA in that hour arrive on time 75.2% of the time against 78.9% across the airport’s whole day — the slot alone is worth 3.7 points worse before anything about this particular flight is considered.
Both airport figures cover every destination from SEA, so they describe the slot, not this journey; the route comparison is above. Why the hour matters.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · Hours below 120 departures are not scored.
Other routes AS472 has flown
Carriers reassign flight numbers. AS472 also served these 4 other city pairs in the period.
The figures above describe only SEA → STL, the route AS472 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
35 min late
against a median of 0 min early
Percentiles over 720 operations; cancelled and diverted flights are counted separately.
Source: US DOT Bureau of Transportation Statistics · Data covering July 2023 – August 2026
Other flights on this route
Same airports, same journey, different odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| AS388 | Alaska Airlines | 83.4% | 4 min early | 954 |
| AS472 this flight | Alaska Airlines | 75.7% | 0 min early | 720 |
Among all 2 departures on this route with at least 600 operations, AS472 has the lowest on-time rate, 7.7 points behind the best. Every departure here has at least 600 operations; the other rows are the most punctual on the route, not all of them.
Data and methodology
Calculated by FlyerIntel from 720 records of AS472 operating SEA → STL, 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 reported separately, not in the on-time rate.
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