Saturday, October 10 · typical odds for a Saturday (too early for a weather forecast) · issued Sun 8:00 PM ET · 5 nonstops

Sat, Oct 10: WN 4213 at 08:27 is the safest bet, 6% chance of being 15+ min late; evening flights run 16–24%.

Safest bet that day WN 4213 PHX 08:27 → BOI 11:56 · 6% chance 15+ min late Riskiest WN 577 PHX 16:29 → BOI 19:39 · 24% chance 15+ min late

Every nonstop on Sat, Oct 10

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 4213 Southwest	PHX 08:27	BOI 11:56	6%	1%	0.6%	no record
AA 4080 American flown by Envoy Flight history →	PHX 10:15	BOI 13:32	11%	4%	0.6%	71%
AA 4952 American flown by SkyWest Flight history →	PHX 18:46	BOI 22:04	16%	7%	0.7%	89%
MQ 4175 Envoy	PHX 14:00	BOI 17:13	16%	5%	0.7%	no record
WN 577 Southwest	PHX 16:29	BOI 19:39	24%	6%	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 Sat, Oct 10 (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