Wednesday, October 7 · typical odds for a Wednesday (too early for a weather forecast) · issued Sat 12:00 PM ET · 5 nonstops

Wed, Oct 7 looks like a normal day here: all 5 nonstops are 8–11% likely to arrive 15+ min late.

Safest bet that day WN 3170 PHX 10:35 → BOI 13:40 · 8% chance 15+ min late Riskiest WN 1420 PHX 20:27 → BOI 23:38 · 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.


WN 3170 Southwest	PHX 10:35	BOI 13:40	8%	1%	0.5%	no record
AA 4080 American flown by Envoy Flight history →	PHX 10:18	BOI 13:42	8%	2%	0.6%	71%
AA 4952 American flown by SkyWest Flight history →	PHX 19:07	BOI 22:20	10%	3%	0.6%	89%
MQ 4175 Envoy	PHX 13:48	BOI 17:02	11%	3%	0.6%	no record
WN 1420 Southwest	PHX 20:27	BOI 23:38	11%	3%	0.6%	no record

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