Flight number record
AS 460
Alaska Airlines · Seattle to Boston
- Route
- SEA → BOS
- Departs
- 15:59
- Flights
- 359
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 460, check with Alaska Airlines.
AS 460 lands a B, 5 points better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about 45 minutes on average. That rests on 359 flights, with a median arrival 11 minutes early.
Set against the rest of the country, AS 460's record is 5 points better than the US average of 77.3%. That gap is worth roughly 45 fewer late arrivals for every thousand flights.
Key figures
On time
81.8%
Arrivals under 15 minutes late, of 352 completed flights
Avg delay
45 min
Across delayed arrivals only, not all flights
Cancelled
1.11%
National rate is 1.89%
1 hour+ late
4.3%
National rate is 8.3%
These figures cover 359 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 460 flies
AS 460 flies SEA to BOS without a single fixed slot. Its most common scheduled departure was 15:59, used on 75 of 359 flights, with 15:36 (70 flights) and 15:38 (51 flights) next.
- Departs 15:5975 flights20.9%
- Departs 15:3670 flights19.5%
- Departs 15:3851 flights14.2%
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 15:59 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and AS 460 runs 10 points better at 81.8%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
AS 460 next to SEA to BOS
Every carrier on SEA to BOS combined arrived on time 75.1% of the time across 2,554 flights, so AS 460 is 7 points ahead of it. Alaska flew 1,240 flights on the same city pair under all its flight numbers, including this one, and those ran 77.5% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 460thin sample | 359 | 81.8% | 45 min | 1.11% | B |
| All Alaska Airlines on SEA–BOS | 1,240 | 77.5% | 51 min | 1.13% | B |
| All carriers on SEA–BOS | 2,554 | 75.1% | 64 min | 1.49% | B |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 460 quarter by quarter
AS 460 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.4% on time and its weakest Jul–Sep 2025 at 70.0%, a swing of 18 points on roughly 72 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 flights70.0%
- Oct–Dec 202587 flights85.5%
- Jan–Mar 202689 flights88.4%
- Apr–Jun 202691 flights83.5%
- Jul–Sep 202662 flights71.0%
Scale runs 60% to 95%.
By weekday, AS 460 did best on Wednesday at 90.4% on time and worst on Monday at 72.0%. Each day rests on about 51 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 460 runs when it is late
AS 460 often beats the schedule: 149 of 352 completed flights, 42%, arrived 15 minutes or more early. The 64 late arrivals split 28 under half an hour, 21 between 30 and 60 minutes, and 15 an hour or more.
- 15+ min early149 flights42.3%
- Within 15 min139 flights39.5%
- 15–29 min late28 flights8.0%
- 30–59 min late21 flights6.0%
- 1–2 hours late10 flights2.8%
- 2+ hours late5 flights1.4%
Scale runs 0% to 100%.
Share of 352 completed flights by arrival against schedule.
A late pushback is often recovered here: of 100 departures that left 15 minutes late or more, 38 still arrived on time. Only 2 left on time and still arrived late.
The worst days
Worst days for AS 460
The latest arrival of the period was on 6 July 2026, 2 hours 52 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. On three of the five worst days the largest share was filed as a late-arriving aircraft.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 July 2026 | 2 hours 52 minutes | National Airspace System |
| 2 August 2026 | 2 hours 28 minutes | Late-arriving aircraft |
| 7 July 2026 | 2 hours 23 minutes | National Airspace System |
| 26 January 2026 | 2 hours 20 minutes | Late-arriving aircraft |
| 7 June 2026 | 2 hours 1 minute | Late-arriving aircraft |
Delay causes
Why AS 460 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 2,857 reported delay minutes.
- 37%Late-arriving aircraft
- 35%National Airspace System
- 22%Carrier
- 6%Extreme weather
37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,857 reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 2,857 delay minutes reported on AS 460.
Cancellations sit at 1.11% against a national 1.89%, which is ordinary. Diversions add another 0.84%.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.3% 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 2,496 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.
Every one of the 359 flights under AS 460 in the data flew SEA to BOS. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 359 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 460
For a booking, read AS 460 as 81.8% on time with 1.11% cancelled over 359 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SEA to BOS, every carrier and departure
- BOS to SEA, the return direction
- Alaska Airlines 306 on the same route75.6%
- Delta Air Lines 459 on the same route88.1%
- Delta Air Lines 473 on the same route83.5%
- Seattle-Tacoma International (SEA) delay statistics
- Boston Logan International (BOS) 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
- Why the first flight of the morning is statistically safest
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.