Flight number record
AS 1319
Alaska Airlines · Boston to Portland
- Route
- BOS → PDX
- Departs
- 16:54
- Flights
- 341
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 1319, check with Alaska Airlines.
AS 1319 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 341 flights, with a median arrival 2 minutes early.
The national on-time rate over the same period is 77.3%, so AS 1319 runs 8 points behind the country as a whole. Across a thousand flights that is about 81 extra late arrivals.
Key figures
On time
69.2%
Arrivals under 15 minutes late, of 334 completed flights
Avg delay
56 min
Across delayed arrivals only, not all flights
Cancelled
2.05%
National rate is 1.89%
1 hour+ late
8.4%
National rate is 8.3%
These figures cover 341 flights between September 2025 and August 2026. Beyond the headline rate, 8.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When AS 1319 flies
AS 1319 flies BOS to PDX without a single fixed slot. Its most common scheduled departure was 16:54, used on 37 of 341 flights, with 16:27 (35 flights) next.
- Departs 16:5437 flights10.9%
- Departs 16:2735 flights10.3%
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 16:54 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and AS 1319 runs 3 points worse at 69.2%. 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 1319 next to BOS to PDX
Every carrier on BOS to PDX combined arrived on time 74.1% of the time across 700 flights, so AS 1319 is 5 points behind it. Alaska flew 539 flights on the same city pair under all its flight numbers, including this one, and those ran 76.7% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 1319thin sample | 341 | 69.2% | 56 min | 2.05% | C |
| All Alaska Airlines on BOS–PDX | 539 | 76.7% | 52 min | 1.30% | B |
| All carriers on BOS–PDX | 700 | 74.1% | 60 min | 2.29% | C |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 1319 quarter by quarter
AS 1319 did not run the same all year. Its best quarter was Apr–Jun 2026 at 73.6% on time and its weakest Oct–Dec 2025 at 62.4%, a swing of 11 points on roughly 85 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 202526 flights—
- Oct–Dec 202588 flights62.4%
- Jan–Mar 202675 flights68.1%
- Apr–Jun 202691 flights73.6%
- Jul–Sep 202661 flights71.7%
Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.
By weekday, AS 1319 did best on Wednesday at 78.0% on time and worst on Tuesday at 63.0%. Each day rests on about 49 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 1319 runs when it is late
AS 1319 often beats the schedule: 94 of 334 completed flights, 28%, arrived 15 minutes or more early. The 103 late arrivals split 37 under half an hour, 38 between 30 and 60 minutes, and 28 an hour or more.
- 15+ min early94 flights28.1%
- Within 15 min137 flights41.0%
- 15–29 min late37 flights11.1%
- 30–59 min late38 flights11.4%
- 1–2 hours late21 flights6.3%
- 2+ hours late7 flights2.1%
Scale runs 0% to 100%.
Share of 334 completed flights by arrival against schedule.
13 of 69 late departures made up the time and arrived on time, 19% of them. In the other direction, 47 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at PDX.
The worst days
Worst days for AS 1319
The latest arrival of the period was on 17 August 2026, 6 hours 25 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 August 2026 | 6 hours 25 minutes | Late-arriving aircraft |
| 16 June 2026 | 4 hours 55 minutes | Carrier |
| 6 November 2025 | 4 hours 40 minutes | Carrier |
| 25 September 2025 | 3 hours 6 minutes | Late-arriving aircraft |
| 28 November 2025 | 2 hours 40 minutes | Late-arriving aircraft |
Delay causes
Why AS 1319 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 5,794 reported delay minutes.
- 39%Late-arriving aircraft
- 34%National Airspace System
- 22%Carrier
- 5%Extreme weather
39% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 5,794 reported delay minutes here, that single category outweighs weather by 8 to one. The split is drawn from 5,794 delay minutes reported on AS 1319.
Cancellations sit at 2.05% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
8.4% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
At 2,537 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 341 flights under AS 1319 in the data flew BOS to PDX. 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. 341 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 1319
For a booking, read AS 1319 as 69.2% on time with 2.05% cancelled over 341 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- Boston Logan International (BOS) delay statistics
- Portland International (PDX) 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.