Flight number record

AS 499

Alaska Airlines · Portland to Seattle

Route: PDX → SEA
Departs: 06:00
Flights: 291
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s AS 499, check with Alaska Airlines.

AS 499 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 15 points better than the national rate of 77.3%. When something does go wrong the average delay runs roughly 35 minutes. That rests on 291 flights, with a median arrival 4 minutes early.

Set against the rest of the country, AS 499's record is 15 points better than the US average of 77.3%. That gap is worth roughly 154 fewer late arrivals for every thousand flights.

On time

92.7%

Arrivals under 15 minutes late, of 289 completed flights

Avg delay

33 min

Across delayed arrivals only, not all flights

Cancelled

0.69%

National rate is 1.89%

1 hour+ late

0.3%

National rate is 8.3%

These figures cover 291 flights between September 2025 and August 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.

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Schedule

When AS 499 flies

AS 499 flies PDX to SEA without a single fixed slot. Its most common scheduled departure was 06:00, used on 116 of 291 flights, with 06:19 (69 flights) and 06:05 (33 flights) next.

Departs 06:00116 flights39.9%
Departs 06:1969 flights23.7%
Departs 06:0533 flights11.3%

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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AS 499 runs 3 points better at 92.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

AS 499 next to PDX to SEA

Every carrier on PDX to SEA combined arrived on time 84.9% of the time across 4,927 flights, so AS 499 is 8 points ahead of it. Alaska flew 1,205 flights on the same city pair under all its flight numbers, including this one, and those ran 82.1% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 13 points.

AS 499 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 499thin sample	291	92.7%	33 min	0.69%	A+
All Alaska Airlines on PDX–SEA	1,205	82.1%	42 min	1.24%	B
All carriers on PDX–SEA	4,927	84.9%	54 min	0.71%	B+
Alaska Airlines, whole network	309,844	79.7%	52 min	1.20%	B

Across the year

AS 499 quarter by quarter

AS 499 did not run the same all year. Its best quarter was Apr–Jun 2026 at 97.1% on time and its weakest Oct–Dec 2025 at 86.5%, a swing of 11 points on roughly 58 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 flights96.7%
Oct–Dec 202575 flights86.5%
Jan–Mar 202654 flights88.9%
Apr–Jun 202670 flights97.1%
Jul–Sep 202662 flights96.8%

Scale runs 80% to 100%.

By weekday, AS 499 did best on Saturday at 97.6% on time and worst on Friday at 82.9%. Each day rests on about 42 flights, so a gap of 15 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late AS 499 runs when it is late

Most of the lateness is short. 16 of the 21 late arrivals were under half an hour behind, and 1 reached an hour or more.

15+ min early52 flights18.0%
Within 15 min216 flights74.7%
15–29 min late16 flights5.5%
30–59 min late4 flights1.4%
1–2 hours late0 flights0.0%
2+ hours late1 flights0.3%

Scale runs 0% to 100%.

Share of 289 completed flights by arrival against schedule.

Only 14 of 289 completed flights left 15 minutes late or more, too few to say how often the time is made up.

The worst days

Worst days for AS 499

The latest arrival of the period was on 2 January 2026, 3 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.

The latest arrivals of AS 499 in the period
Date	Arrived late by	Largest filed cause
2 January 2026	3 hours 22 minutes	Carrier
17 May 2026	45 minutes	Carrier
27 March 2026	44 minutes	Carrier
13 March 2026	35 minutes	Carrier
24 October 2025	34 minutes	National Airspace System

Delay causes

Why AS 499 runs late

Carrier accounts for 55% of the 692 delay minutes carriers reported here, and the remaining four split what is left.

Carrier
55%
National Airspace System
45%

45% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 310 minutes out of 692, against a national NAS share of 21%. The split is drawn from 692 delay minutes reported on AS 499.

Cancellations are rare at 0.69%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 0.3% 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.

Every one of the 291 flights under AS 499 in the data flew PDX to SEA. 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. 291 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 499

For a booking, AS 499 has one of the better records a US domestic flight can show: 92.7% on time and 0.69% cancelled. That is a base rate, not a promise about any single 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, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures