Flight number record
AS 522
Alaska Airlines · Seattle to Nashville
- Route
- SEA → BNA
- Departs
- 09:00
- Flights
- 285
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 522, check with Alaska Airlines.
AS 522 lands a B+, 6 points better than the national rate of 77.3%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 45 minutes on average. That rests on 285 flights, with a median arrival 11 minutes early.
Set against the rest of the country, AS 522's record is 6 points better than the US average of 77.3%. That gap is worth roughly 64 fewer late arrivals for every thousand flights.
Key figures
On time
83.7%
Arrivals under 15 minutes late, of 283 completed flights
Avg delay
46 min
Across delayed arrivals only, not all flights
Cancelled
0.70%
National rate is 1.89%
1 hour+ late
3.2%
National rate is 8.3%
These figures cover 285 flights between September 2025 and August 2026. The median arrival is 11 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When AS 522 flies
AS 522 flies SEA to BNA without a single fixed slot. Its most common scheduled departure was 09:00, used on 35 of 285 flights, with 09:51 (34 flights) and 09:50 (33 flights) next.
- Departs 09:0035 flights12.3%
- Departs 09:5134 flights11.9%
- Departs 09:5033 flights11.6%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 09:00 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 522 runs level with that at 83.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
AS 522 next to SEA to BNA
Every carrier on SEA to BNA combined arrived on time 80.6% of the time across 1,481 flights, so AS 522 is 3 points ahead of it. Alaska flew 845 flights on the same city pair under all its flight numbers, including this one, and those ran 82.1% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 4 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 522thin sample | 285 | 83.7% | 46 min | 0.70% | B+ |
| All Alaska Airlines on SEA–BNA | 845 | 82.1% | 44 min | 0.95% | B+ |
| All carriers on SEA–BNA | 1,481 | 80.6% | 48 min | 0.88% | B+ |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 522 quarter by quarter
AS 522 did not run the same all year. Its best quarter was Apr–Jun 2026 at 87.1% on time and its weakest Jul–Sep 2025 at 76.7%, a swing of 10 points on roughly 71 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights76.7%
- Oct–Dec 202589 flights83.1%
- Jan–Mar 202683 flights85.2%
- Apr–Jun 202670 flights87.1%
- Jul–Sep 202613 flights—
Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, AS 522 did best on Saturday at 88.9% on time and worst on Tuesday at 75.6%. Each day rests on about 41 flights, so a gap of 13 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 522 runs when it is late
AS 522 often beats the schedule: 117 of 283 completed flights, 41%, arrived 15 minutes or more early. The 46 late arrivals split 21 under half an hour, 16 between 30 and 60 minutes, and 9 an hour or more.
- 15+ min early117 flights41.3%
- Within 15 min120 flights42.4%
- 15–29 min late21 flights7.4%
- 30–59 min late16 flights5.7%
- 1–2 hours late6 flights2.1%
- 2+ hours late3 flights1.1%
Scale runs 0% to 100%.
Share of 283 completed flights by arrival against schedule.
12 of 44 late departures made up the time and arrived on time, 27% of them. 14 flights left on time and still arrived late.
The worst days
Worst days for AS 522
The latest arrival of the period was on 3 September 2025, 3 hours 44 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. The five worst days are spread across September, March, August and November, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 September 2025 | 3 hours 44 minutes | National Airspace System |
| 13 March 2026 | 3 hours 30 minutes | Extreme weather |
| 31 August 2026 | 2 hours 25 minutes | Carrier |
| 30 September 2025 | 1 hour 37 minutes | Carrier |
| 17 November 2025 | 1 hour 22 minutes | National Airspace System |
Delay causes
Why AS 522 runs late
Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,102 reported delay minutes.
- 39%Carrier
- 37%National Airspace System
- 16%Late-arriving aircraft
- 8%Extreme weather
The largest share of delay minutes, 39%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 818 of the 2,102 delay minutes reported here. The split is drawn from 2,102 delay minutes reported on AS 522.
Cancellations are rare at 0.70%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 3.2% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.
At 1,978 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
The same number turns up on two other city pairs in the data, including BNA to SEA (135) and SEA to PHL (69), but none flew often enough under AS 522 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SEA to BNA only.
One caution: this is a thin sample. 285 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking AS 522
For a booking, read AS 522 as 83.7% on time with 0.70% cancelled over 285 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to BNA, every carrier and departure
- BNA to SEA, the return direction
- Alaska Airlines 382 on the same route81.9%
- Delta Air Lines 815 on the same route80.1%
- Seattle-Tacoma International (SEA) delay statistics
- Nashville International (BNA) delay statistics
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Worst months to fly in the US, ranked by the data
A flight number here means Alaska Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.