Flight profile · Alaska Airlines
AS555
Seattle (SEA) to Minneapolis (MSP) · scheduled 8:00 AM – 1:57 PM
How AS555 performs
857 operations, July 2023 – July 2026.
AS555’s scheduled departure has moved during the period FlyerIntel has on file: it typically left around 8:00 AM earlier on, and around 8:30 AM more recently — a 30-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 · 857 operations, July 2023 – July 2026 · If AS555 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
What stands out
How AS555 compares to other flight numbers, not just to itself.
Every day of the week performs about the same on this flight, steadier than 97% of 1,710 comparable flight numbers.
87.2% on time on the best day (Saturday) against 83.5% on the worst (Friday).
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · The one thing about this specific departure that ranks most extreme against every other published flight number, out of everything FlyerIntel checks — shown only when something clears a real statistical bar, not for every flight.
Where AS555 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 AS555 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 |
|---|---|---|---|---|---|
| AS555 | 85.4% | 0.82% | -4 min | 2.2% | 857 |
| Alaska Airlines on SEA → MSP | 79.3% | 0.79% | -2 min | 4.0% | 2,914 |
| All SEA → MSP flights | 85.8% | 0.55% | -8 min | 3.3% | 8,340 |
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why AS555 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding and fueling, all within the carrier’s control
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
Share of the delay minutes US DOT attributed to each cause for AS555 on SEA → MSP. 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 AS555 comes in late, and what that does to the departure.
AS555 is usually the aircraft’s first flight of the day: the schedule gives it a median of 8.4 hours on the ground at SEA, so its “inbound” is mostly the aircraft’s arrival the evening before.
When the aircraft came in 15 or more minutes late, AS555 pushed back an average of 2 minutes late; when it came in on time or early, an average of 2 minutes late.
Each departure is matched to the flight the same aircraft flew into SEA just before it, using the tail number in the DOT file, 707 of 851 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 |
|---|---|---|---|
| AS555 | 25% | 11% | 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 AS555’s aircraft landed 15 or more minutes late is lower than the network’s and, once the aircraft was late, how often AS555 left 15 or more minutes late is about the same as 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 SEA late, does that still matter by the time it reaches MSP?
AS555 pushes back an average of 3.0 minutes late and reaches the gate at MSP an average of 0.6 minutes early. The 3.6 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 25.7 minutes on the taxiways at SEA, 1.1 minutes longer than a typical SEA departure in the same hour.
On arrival at MSP, AS555 spends 7.3 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 MSP 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 MSP. Taxi-out is gate to wheels up and sits inside the scheduled block rather than on top of it; the comparison is 33,301 departures from SEA scheduled in the clock hour AS555 most often leaves in. Taxi-in is landing to gate, compared against every arrival FlyerIntel has on file at MSP (369,815 flights), not just AS555’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves SEA
Part of any flight’s record belongs to the clock rather than to the flight. AS555 has one departure time, so this is what that time is worth.
On-time arrival rate. 33,301 departures from SEA are scheduled in the 8 AM–9 AM hour over the period, against 510,205 across the whole day.
AS555 is scheduled out of SEA at 8:00 AM, in the 8 AM–9 AM bank. Departures from SEA in that hour arrive on time 83.7% of the time against 79.1% across the airport’s whole day — the slot alone is worth 4.6 points better before anything about this particular flight is considered.
The two airport figures cover every departure from SEA 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 AS555 run worse on particular days?
Saturday is historically the most reliable day and Friday the least, a gap of 3.7 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026 · Days with fewer than 120 operations are not scored.
Other routes AS555 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| MSP→SEA Minneapolis to Seattle | July 1, 2023 – July 31, 2026 | 838 | 79.4% |
Because the same number has served different journeys, the statistics above describe only the route AS555 currently operates. Blending them would produce an average of two different flights.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
20 min late
against a median of 4 min early
Percentiles over 857 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 |
|---|---|---|---|---|
| DL943 | Delta Air Lines | 95.1% | 17 min early | 785 |
| DL941 | Delta Air Lines | 85.4% | 7 min early | 746 |
| AS555 this flight | Alaska Airlines | 85.4% | 4 min early | 857 |
| DL949 | Delta Air Lines | 84.0% | 11 min early | 702 |
| AS386 | Alaska Airlines | 77.7% | 3 min early | 1,016 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. AS555 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 857 records of AS555 operating SEA → MSP, 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
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