Flight number record
AS 324
Alaska Airlines · Portland to Chicago
- Route
- PDX → ORD
- Departs
- 07:00
- Flights
- 354
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 324, check with Alaska Airlines.
AS 324 sits in the middle of the pack with a C+. Close to three flights in four arrive on time by the DOT's definition, 3 points worse than the national rate of 77.3%. The late ones land about 45 minutes behind schedule. That rests on 354 flights, with a median arrival 1 minute late.
Key figures
On time
74.1%
Arrivals under 15 minutes late, of 347 completed flights
Avg delay
45 min
Across delayed arrivals only, not all flights
Cancelled
0.85%
National rate is 1.89%
1 hour+ late
4.9%
National rate is 8.3%
These figures cover 354 flights between September 2025 and August 2026. On-time means an arrival less than 15 minutes after the scheduled gate time, the same threshold the Department of Transportation uses in its own reports. Cancelled and diverted flights are excluded from the on-time rate and counted separately, which is why the cancellation column matters on its own.
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Schedule
When AS 324 flies
AS 324 flies PDX to ORD without a single fixed slot. Its most common scheduled departure was 07:00, used on 205 of 354 flights.
- Departs 07:00205 flights57.9%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AS 324 runs 15 points worse at 74.1%. 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 324 next to PDX to ORD
Every carrier on PDX to ORD combined arrived on time 79.2% of the time across 2,814 flights, so AS 324 is 5 points behind it. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 324thin sample | 354 | 74.1% | 45 min | 0.85% | C+ |
| All Alaska Airlines on PDX–ORD | 500 | 78.9% | 44 min | 1.40% | B |
| All carriers on PDX–ORD | 2,814 | 79.2% | 76 min | 1.00% | B |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 324 quarter by quarter
AS 324 did not run the same all year. Its best quarter was Jan–Mar 2026 at 83.5% on time and its weakest Oct–Dec 2025 at 66.7%, a swing of 17 points on roughly 71 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 flights66.7%
- Oct–Dec 202592 flights66.7%
- Jan–Mar 202679 flights83.5%
- Apr–Jun 202691 flights76.4%
- Jul–Sep 202662 flights72.9%
Scale runs 60% to 90%.
By weekday, AS 324 ranged from 68.6% on Sunday to 78.8% on Tuesday. With about 51 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late AS 324 runs when it is late
Most of the lateness is short. 53 of the 90 late arrivals were under half an hour behind, and 17 reached an hour or more.
- 15+ min early54 flights15.6%
- Within 15 min203 flights58.5%
- 15–29 min late53 flights15.3%
- 30–59 min late20 flights5.8%
- 1–2 hours late9 flights2.6%
- 2+ hours late8 flights2.3%
Scale runs 0% to 100%.
Share of 347 completed flights by arrival against schedule.
A late pushback is often recovered here: of 42 departures that left 15 minutes late or more, 13 still arrived on time. In the other direction, 61 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 ORD.
The worst days
Worst days for AS 324
The latest arrival of the period was on 11 August 2026, 3 hours 19 minutes behind schedule; most of its delay minutes were filed as national airspace system delay. Three of the five worst days fell in December 2025.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 11 August 2026 | 3 hours 19 minutes | National Airspace System |
| 20 December 2025 | 3 hours 3 minutes | Carrier |
| 11 December 2025 | 2 hours 56 minutes | Carrier |
| 7 December 2025 | 2 hours 42 minutes | National Airspace System |
| 8 February 2026 | 2 hours 36 minutes | Carrier |
Delay causes
Why AS 324 runs late
National Airspace System accounts for 72% of the 4,012 delay minutes carriers reported here, and the remaining four split what is left.
- 72%National Airspace System
- 27%Carrier
- 0%Late-arriving aircraft
72% 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 2,903 minutes out of 4,012, against a national NAS share of 21%. The split is drawn from 4,012 delay minutes reported on AS 324.
Cancellations are rare at 0.85%, 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 4.9% 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.
At 1,739 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 354 flights under AS 324 in the data flew PDX to ORD. 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. 354 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 324
For a booking, AS 324 is one of the weaker ways to fly PDX to ORD: 5 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.
Related
Where to go next
- PDX to ORD, every carrier and departure
- ORD to PDX, the return direction
- United Airlines 1490 on the same route87.0%
- Portland International (PDX) delay statistics
- Chicago O'Hare International (ORD) 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
- Worst months to fly in the US, ranked by the data
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.