Wednesday, October 7 · typical odds for a Wednesday (too early for a weather forecast) · issued Sat 12:00 PM ET · 7 nonstops

Wed, Oct 7 looks like a normal day here: all 4 nonstops are 4–11% likely to arrive 15+ min late.

Safest bet that day OO 3403 PDX 06:56 → BOI 09:23 · 4% chance 15+ min late Riskiest AS 797 PDX 11:08 → BOI 13:27 · 11% chance 15+ min late

Every nonstop on Wed, Oct 7

12-month record →

Ranked by the chance of arriving 15+ minutes late (typical odds: the weather this date has had in past years), with each flight’s on-time record over Aug 2025 – Jul 2026 beside it. Times are local. Pick a flight for its forecast. Click a column to sort. Dimmed: airlines we don’t forecast yet, shown with their 12-month record if they usually fly that weekday.


OO 3403 SkyWest	PDX 06:56	BOI 09:23	4%	3%	0.8%	no record
AS 447 Alaska Flight history →	PDX 21:37	BOI 23:56	9%	3%	0.6%	87%
AS 342 Alaska Flight history →	PDX 14:58	BOI 17:16	10%	3%	0.6%	87%
AS 797 Alaska	PDX 11:08	BOI 13:27	11%	2%	0.6%	no record
AS 2161 Alaska flown by Horizon no forecast: 12-month record	PDX 07:00	BOI 09:19	2%	0%	1.9%	98%
AS 2089 Alaska flown by Horizon no forecast: 12-month record	PDX 10:30	BOI 12:49	4%	1%	0.0%	96%
AS 2104 Alaska flown by Horizon no forecast: 12-month record	PDX 17:31	BOI 19:48	29%	10%	0.0%	71%

How these are worked out. Each flight’s odds are our forecast for that day (typical odds until the weather forecast covers it); flights of airlines we don’t forecast yet use their 12-month record and are marked. Makes the connection: the first flight’s 12-month lateness curve, scaled so its chance of arriving 15+ min late matches the day’s forecast, at the layover minus the 45-minute minimum (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled × second flight within 15 minutes, each from the day’s forecast.

About this data: forecast odds from our model for Wed, Oct 7 (newest published update); 12-month records from US DOT on-time data, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. JSON