Flight number record

AS 317

Alaska Airlines · Dallas-Fort Worth to Seattle

Route: DFW → SEA
Departs: 18:16
Flights: 262
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 317, check with Alaska Airlines.

AS 317 draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 262 flights, with a median arrival 3 minutes late.

The national on-time rate over the same period is 77.6%, so AS 317 runs 10 points behind the country as a whole. Across a thousand flights that is about 104 extra late arrivals.

On time

67.2%

Arrivals under 15 minutes late, of 259 completed flights

Avg delay

66 min

Across delayed arrivals only, not all flights

Cancelled

1.15%

National rate is 1.81%

1 hour+ late

11.2%

National rate is 8.1%

These figures cover 262 flights between July 2025 and June 2026. Beyond the headline rate, 11.2% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When AS 317 flies

AS 317 flies DFW to SEA without a single fixed slot. Its most common scheduled departure was 18:16, used on 50 of 262 flights, with 18:00 (39 flights) and 18:14 (31 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:1650 flights19.1%
Departs 18:0039 flights14.9%
Departs 18:1431 flights11.8%

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 18:16 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and AS 317 runs level with that at 67.2%. 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 317 next to DFW to SEA

Every carrier on DFW to SEA combined arrived on time 69.5% of the time across 5,232 flights, so AS 317 is 2 points behind it. Alaska flew 1,756 flights on the same city pair under all its flight numbers, including this one, and those ran 72.7% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight trails by 12 points.

AS 317 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 317thin sample	262	67.2%	66 min	1.15%	C
All Alaska Airlines on DFW–SEA	1,756	72.7%	57 min	1.48%	C
All carriers on DFW–SEA	5,232	69.5%	64 min	2.12%	C
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 317 quarter by quarter

AS 317 did not run the same all year. Its best quarter was Oct–Dec 2025 at 76.1% on time and its weakest Jul–Sep 2025 at 55.8%, a swing of 20 points on roughly 87 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 202586 flights55.8%
Oct–Dec 202589 flights76.1%
Jan–Mar 202666 flights71.9%
Apr–Jun 202621 flights—

Scale runs 45% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, AS 317 did best on Wednesday at 82.1% on time and worst on Friday at 57.9%. Each day rests on about 37 flights, so a gap of 24 points is worth noticing but could still narrow in another year.

Delay causes

Why AS 317 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 50% of the 5,607 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
50%
National Airspace System
22%
Carrier
20%
Extreme weather
5%
Security
2%

50% 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 5,607 reported delay minutes here, that single category outweighs weather by 9 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 5,607 delay minutes reported on AS 317.

Cancellations sit at 1.15% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 11.2% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

At 1,660 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 three other city pairs in the data, including SEA to RDM (35), SEA to DFW (28) and DEN to SEA (21), but none flew often enough under AS 317 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DFW to SEA only.

One caution: this is a thin sample. 262 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 317

For a booking, read AS 317 as 67.2% on time with 1.15% cancelled over 262 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