Flight profile · Alaska Airlines
AS522
Seattle (SEA) to Nashville (BNA) · scheduled 10:20 AM – 4:44 PM
How AS522 performs
1,073 operations, July 2023 – August 2026.
Between its first and last recorded date on SEA → BNA, AS522 averaged about 6 operations a week (1,073 in 1,158 days, cancelled ones included).
AS522 arrived on time 78.3% of the time, level with the 78.0% for all SEA → BNA flights: on arrival punctuality it is a typical departure on this route, neither better nor worse.
Source: US DOT Bureau of Transportation Statistics · 1,073 operations, July 2023 – August 2026 · If AS522 is cancelled or significantly changed, DOT’s automatic refund rule may entitle you to your money back. The refund checker walks through eligibility.
Where AS522 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 |
|---|---|---|---|---|---|
| AS522 | 78.3% | 0.84% | -3 min | 3.4% | 1,073 |
| Alaska Airlines on SEA → BNA | 77.3% | 0.74% | -3 min | 3.5% | 2,838 |
| All SEA → BNA flights | 78.0% | 0.60% | -4 min | 4.2% | 4,468 |
AS522 cancelled 9 of 1,073 operations (0.84%), close to the 0.60% for SEA → BNA.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
Why AS522 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
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 AS522 on SEA → BNA. 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 AS522 comes in late, and what that does to the departure.
The aircraft flying AS522 came in 15 or more minutes late on 12% of the departures where its previous flight is known. There are not enough departures in both groups to say how the flight left after a late one and after an on-time one.
Matched by tail number to the aircraft’s previous flight into SEA: 964 of 1,064 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 |
|---|---|
| AS522 | 12% |
| Network, same turn | 17% |
63 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 AS522’s aircraft landed 15 or more minutes late is lower than the network’s. There are not enough departures in both groups to compare how it left.
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 BNA?
AS522 pushes back an average of 7.2 minutes late and reaches the gate at BNA an average of 2.0 minutes late. The 5.2 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. Its 24.2 minutes on the taxiways at SEA is about what any departure from the airport in that hour spends.
On arrival at BNA, AS522 spends 8.4 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 BNA spends on the ground before reaching the gate.
Taxi-out is gate to wheels up and sits inside the scheduled block; the hourly comparison is 31,804 SEA departures. Taxi-in is landing to gate, set against 329,326 arrivals at BNA. More on taxi time.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026
The hour it leaves SEA
AS522 has one departure time, 10:20 AM, so this is what that hour at SEA is worth.
On-time arrival rate. 31,804 departures from SEA are scheduled in the 10 AM–11 AM hour over the period, against 526,113 across the whole day.
AS522 is scheduled out of SEA at 10:20 AM, in the 10 AM–11 AM bank. Departures from SEA in that hour arrive on time 77.6% of the time against 78.9% across the airport’s whole day, so the hour AS522 leaves in is an ordinary one for SEA and explains nothing about its record either way.
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.
By day of week
Does AS522 run worse on particular days?
Wednesday is historically the most reliable day and Saturday the least, a gap of 11.5 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · July 2023 – August 2026 · Days with fewer than 120 operations are not scored.
Other routes AS522 has flown
Carriers reassign flight numbers. AS522 also served these 2 other city pairs in the period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| SEA→PHL Seattle to Philadelphia | June 10, 2026 – August 17, 2026 | 69 | — |
| BNA→SEA Nashville to Seattle | July 1, 2023 – March 17, 2026 | 290 | 62.1% |
The figures above describe only SEA → BNA, the route AS522 flies now.
When it goes wrong
The average describes a usual day. This is the day that ruins a connection.
31 min late
against a median of 3 min early
Percentiles over 1,073 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 |
|---|---|---|---|---|
| DL815 | Delta Air Lines | 80.6% | 9 min early | 740 |
| AS522 this flight | Alaska Airlines | 78.3% | 3 min early | 1,073 |
| AS382 | Alaska Airlines | 74.6% | 1 min early | 1,062 |
Among all 3 departures on this route with at least 600 operations, AS522 has the 2nd highest on-time rate, 2.3 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 1,073 records of AS522 operating SEA → BNA, 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