Flight profile · Alaska Airlines
AS1327
San Francisco (SFO) to Seattle (SEA) · scheduled 7:55 PM – 9:00 PM
How AS1327 performs
672 operations, July 2023 – July 2026.
AS1327 arrived on time 57.6% of the time, against 75.9% for all SFO → SEA flights, so this departure is 18.3 percentage points worse than the route as a whole. Against Alaska Airlines’ own flights on this route it is 14.0 points worse.
Source: US DOT Bureau of Transportation Statistics · 672 operations, July 2023 – July 2026 · If AS1327 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 AS1327 compares to other flight numbers, not just to itself.
This flight runs unusually far behind the SFO → SEA route as a whole, worse than 96% of 11,788 comparable flight numbers.
57.6% on time for this specific departure, against 75.9% for every SFO → SEA flight.
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 AS1327 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 AS1327 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 |
|---|---|---|---|---|---|
| AS1327 | 57.6% | 2.38% | 8 min | 12.4% | 672 |
| Alaska Airlines on SFO → SEA | 71.6% | 1.74% | -1 min | 7.1% | 8,621 |
| All SFO → SEA flights | 75.9% | 1.16% | -5 min | 6.8% | 20,767 |
AS1327 has cancelled 2.38% of its scheduled departures (16 of 672), against 1.16% for all SFO → SEA flights — this specific departure cancels 1.2 percentage points more often than the route as a whole. Different flight numbers on the same route can carry different aircraft, crews and schedules, so this is a fact about AS1327 specifically, not about the route it flies.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
Why AS1327 runs late
Where US DOT attributed the delay minutes on this flight.
the inbound aircraft was late, so this flight started late
airspace and airport capacity, including weather-driven flow control
crew, maintenance, boarding and fueling, all within the carrier’s control
weather severe enough to stop this flight specifically
Share of the delay minutes US DOT attributed to each cause for AS1327 on SFO → 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 AS1327 comes in late, and what that does to the departure.
When the aircraft came in 15 or more minutes late, AS1327 pushed back an average of 45 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 SFO just before it, using the tail number in the DOT file, 546 of 656 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 |
|---|---|---|---|
| AS1327 | 29% | 74% | 12% |
| Network, same turn | 17% | 68% | 9% |
The schedule leaves a normal turn: enough time to clean and board if the aircraft is on time, little to spare if it is not.
The network row is every flight with a scheduled turn of 60 to 89 minutes. How often AS1327’s aircraft landed 15 or more minutes late is higher than the network’s and, once the aircraft was late, how often AS1327 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 SFO late, does that still matter by the time it reaches SEA?
AS1327 pushes back an average of 17.9 minutes late and arrives a further 2.2 minutes behind that. This departure loses ground between the two gates rather than recovering it, so a late pushback here tends to get worse on the way, not better. It spends 24.8 minutes on the taxiways at SFO, 4.8 minutes longer than a typical SFO departure in the same hour.
On arrival at SEA, AS1327 spends 15.2 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 3.3 minutes longer than a typical SEA arrival (11.9 min).
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 17,402 departures from SFO scheduled in the clock hour AS1327 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 AS1327’s own. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – July 2026
The hour it leaves SFO
Part of any flight’s record belongs to the clock rather than to the flight. AS1327 has one departure time, so this is what that time is worth.
On-time arrival rate. 17,402 departures from SFO are scheduled in the 7 PM–8 PM hour over the period, against 435,779 across the whole day.
AS1327 is scheduled out of SFO at 7:55 PM, in the 7 PM–8 PM bank. Departures from SFO in that hour arrive on time 75.9% of the time against 78.7% across the airport’s whole day, so the hour AS1327 leaves in is an ordinary one for SFO and explains nothing about its record either way.
The two airport figures cover every departure from SFO 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.
Other routes AS1327 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 |
|---|---|---|---|
| SEA→LIH Seattle to Lihue, Kauai | March 18, 2026 | 1 | — |
Because the same number has served different journeys, the statistics above describe only the route AS1327 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.
70 min late
against a median of 8 min late
AS1327 has an average that understates its risk: a typical arrival is 8 min late, but the worst tenth are 62 minutes worse than that. If the trip has something unmissable at the end of it, the median is the wrong number to plan against.
Percentiles over 672 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 |
|---|---|---|---|---|
| AS1225 | Alaska Airlines | 71.7% | 2 min early | 746 |
| AS1327 this flight | Alaska Airlines | 57.6% | 8 min late | 672 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. AS1327 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 672 records of AS1327 operating SFO → 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