Flight number record

AS 646

Alaska Airlines · Dallas-Fort Worth to Portland

Route: DFW → PDX
Departs: 16:46
Flights: 343
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 646, check with Alaska Airlines.

AS 646 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 about an hour on average. That is a workable record, not a spotless one. That rests on 343 flights, with a median arrival 5 minutes early.

On time

79.0%

Arrivals under 15 minutes late, of 338 completed flights

Avg delay

61 min

Across delayed arrivals only, not all flights

Cancelled

1.17%

National rate is 1.81%

1 hour+ late

6.5%

National rate is 8.1%

These figures cover 343 flights between July 2025 and June 2026. The median arrival is 5 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 646 flies

AS 646 flies DFW to PDX without a single fixed slot. Its most common scheduled departure was 16:46, used on 48 of 343 flights, with 16:32 (39 flights) and 17:30 (35 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:4648 flights14.0%
Departs 16:3239 flights11.4%
Departs 17:3035 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 16:46 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and AS 646 runs 7 points better at 79.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

AS 646 next to DFW to PDX

Every carrier on DFW to PDX combined arrived on time 64.9% of the time across 2,410 flights, so AS 646 is 14 points ahead of it. Across its whole network Alaska Airlines managed 79.1%, close to this flight's figure.

AS 646 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 646thin sample	343	79.0%	61 min	1.17%	B
All Alaska Airlines on DFW–PDX	493	75.5%	64 min	1.22%	B
All carriers on DFW–PDX	2,410	64.9%	64 min	2.61%	D
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 646 quarter by quarter

AS 646 did not run the same all year. Its best quarter was Jan–Mar 2026 at 89.2% on time and its weakest Jul–Sep 2025 at 65.2%, a swing of 24 points on roughly 86 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 202590 flights65.2%
Oct–Dec 202584 flights77.4%
Jan–Mar 202678 flights89.2%
Apr–Jun 202691 flights85.7%

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

By weekday, AS 646 ranged from 72.5% on Saturday to 84.3% on Thursday. With about 49 flights behind each day, a spread of 12 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why AS 646 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 66% of the 4,357 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
66%
National Airspace System
14%
Carrier
11%
Extreme weather
9%

66% 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 4,357 reported delay minutes here, that single category outweighs weather by 8 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 4,357 delay minutes reported on AS 646.

Cancellations sit at 1.17% against a national 1.81%, which is ordinary. Diversions add another 0.29%.

Connections and routes

What a delay on this flight costs

6.5% 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 about an hour, which a normal layover absorbs.

At 1,616 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 343 flights under AS 646 in the data flew DFW 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. 343 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 646

For a booking, read AS 646 as 79.0% on time with 1.17% cancelled over 343 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