Flight number record

AS 1319

Alaska Airlines · Boston to Portland

Route: BOS → PDX
Departs: 17:06
Flights: 339
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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, 7 points worse than the national rate of 77.6%. The late ones land roughly 55 minutes behind schedule. That rests on 339 flights, with a median arrival 4 minutes early.

The national on-time rate over the same period is 77.6%, so AS 1319 runs 7 points behind the country as a whole. Across a thousand flights that is about 73 extra late arrivals.

On time

70.3%

Arrivals under 15 minutes late, of 333 completed flights

Avg delay

53 min

Across delayed arrivals only, not all flights

Cancelled

1.77%

National rate is 1.81%

1 hour+ late

7.2%

National rate is 8.1%

These figures cover 339 flights between July 2025 and June 2026. The median arrival is 4 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 1319 flies

AS 1319 flies BOS to PDX without a single fixed slot. Its most common scheduled departure was 17:06, used on 49 of 339 flights, with 17:37 (39 flights) and 16:27 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:0649 flights14.5%
Departs 17:3739 flights11.5%
Departs 16:2735 flights10.3%

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 17:06 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and AS 1319 runs 2 points better at 70.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

AS 1319 next to BOS to PDX

Every carrier on BOS to PDX combined arrived on time 75.8% of the time across 649 flights, so AS 1319 is 6 points behind it. Alaska flew 533 flights on the same city pair under all its flight numbers, including this one, and those ran 78.1% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight trails by 9 points.

AS 1319 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 1319thin sample	339	70.3%	53 min	1.77%	C
All Alaska Airlines on BOS–PDX	533	78.1%	50 min	1.13%	B
All carriers on BOS–PDX	649	75.8%	57 min	1.08%	B
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 1319 quarter by quarter

AS 1319 did not run the same all year. Its best quarter was Jul–Sep 2025 at 76.5% on time and its weakest Oct–Dec 2025 at 62.4%, a swing of 14 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 202585 flights76.5%
Oct–Dec 202588 flights62.4%
Jan–Mar 202675 flights68.1%
Apr–Jun 202691 flights73.6%

Scale runs 55% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, AS 1319 did best on Wednesday at 82.0% on time and worst on Tuesday at 64.6%. Each day rests on about 48 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

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 5,290 reported delay minutes.

Late-arriving aircraft
37%
National Airspace System
35%
Carrier
26%
Extreme weather
3%

37% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 5,290 reported delay minutes here, that single category outweighs weather by 12 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 5,290 delay minutes reported on AS 1319.

Cancellations sit at 1.77% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

7.2% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last roughly 55 minutes, 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 339 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. 339 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, AS 1319 is one of the weaker ways to fly BOS to PDX: 6 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

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