Flight number record

AS 522

Alaska Airlines · Seattle to Nashville

Route: SEA → BNA
Departs: 10:20
Flights: 334
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 522, check with Alaska Airlines.

AS 522 lands a B+, about a point better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by roughly 40 minutes on average. That is a workable record, not a spotless one. That rests on 334 flights, with a median arrival 8 minutes early.

On time

78.9%

Arrivals under 15 minutes late, of 332 completed flights

Avg delay

41 min

Across delayed arrivals only, not all flights

Cancelled

0.60%

National rate is 1.81%

1 hour+ late

3.3%

National rate is 8.1%

These figures cover 334 flights between July 2025 and June 2026. The median arrival is 8 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.

Schedule

When AS 522 flies

AS 522 flies SEA to BNA without a single fixed slot. Its most common scheduled departure was 10:20, used on 50 of 334 flights, with 09:00 (35 flights) and 09:51 (34 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:2050 flights15.0%
Departs 09:0035 flights10.5%
Departs 09:5134 flights10.2%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 10:20 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and AS 522 runs 5 points worse at 78.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

AS 522 next to SEA to BNA

Every carrier on SEA to BNA combined arrived on time 78.6% of the time across 1,479 flights, so AS 522 is about level with it. Alaska flew 843 flights on the same city pair under all its flight numbers, including this one, and those ran 77.0% on time. Across its whole network Alaska Airlines managed 79.1%, close to this flight's figure.

AS 522 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 522thin sample	334	78.9%	41 min	0.60%	B+
All Alaska Airlines on SEA–BNA	843	77.0%	43 min	1.07%	B
All carriers on SEA–BNA	1,479	78.6%	47 min	0.81%	B+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	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 63.0%, a swing of 24 points on roughly 84 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 202592 flights63.0%
Oct–Dec 202589 flights83.1%
Jan–Mar 202683 flights85.2%
Apr–Jun 202670 flights87.1%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, AS 522 did best on Wednesday at 87.5% on time and worst on Tuesday at 69.4%. Each day rests on about 48 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

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 2,881 reported delay minutes.

National Airspace System
39%
Carrier
32%
Late-arriving aircraft
22%
Extreme weather
6%
Security
1%

39% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,119 minutes out of 2,881, against a national NAS share of 21%. The split is drawn from 2,881 delay minutes reported on AS 522.

Cancellations are rare at 0.60%, below the national 1.81% 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 3.3% land an hour or more behind schedule, against 8.1% 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 (184) and SEA to PHL (21), 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. 334 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 78.9% on time with 0.60% cancelled over 334 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures