Friday, October 9 · typical odds for a Friday (too early for a weather forecast) · issued Sun 4:00 PM ET · connections flying that day

Fri, Oct 9: one nonstop, WN 372 at 20:10, with a 32% chance of arriving 15+ min late.

Nonstops that day

All 1 nonstop →


WN 372 Southwest Flight history →	AUS 20:10	ONT 21:05	32%	11%	0.6%	67%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Ontario on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Ontario is 2 h behind Austin). Layovers up to 4 hours. Pick a connection for its 12-month details.


Southwest Details →	AUS 05:50 → LAS 06:35WN 321	2h 30m Las Vegas	LAS 09:05 → ONT 10:10WN 4179	6h 20m	100%	89%
Southwest Details →	AUS 06:40 → PHX 07:00WN 374	3h 05m Phoenix	PHX 10:05 → ONT 11:20WN 431	6h 40m	100%	87%
Southwest Details →	AUS 05:40 → HOU 06:40WN 301	1h 05m Houston	HOU 07:45 → ONT 08:55WN 4391	5h 15m	95%	85%
United Details →	AUS 08:30 → DEN 09:49UA 595	1h 36m Denver	DEN 11:25 → ONT 12:47UA 430	6h 17m	98%	84%
Southwest Details →	AUS 08:15 → SJC 09:45WN 398	1h 05m San Jose	SJC 10:50 → ONT 12:05WN 3151	5h 50m	95%	84%
Delta Details →	AUS 08:15 → SLC 10:12DL 2618	1h 09m Salt Lake City	SLC 11:21 → ONT 12:10DL 3172	5h 55m	94%	83%
Delta Details →	AUS 12:20 → SLC 14:09DL 2671	1h 26m Salt Lake City	SLC 15:35 → ONT 16:30DL 4443 · flown by SkyWest	6h 10m	92%	83%
Southwest Details →	AUS 05:45 → DEN 07:00WN 282	3h 55m Denver	DEN 10:55 → ONT 12:10WN 4080	8h 25m	100%	83%
Tight connection: often missed
Southwest Details →	AUS 20:30 → LAS 21:15WN 330	1h 10m Las Vegas	LAS 22:25 → ONT 23:35WN 2135	5h 05m	70%	46%
Southwest Details →	AUS 21:35 → PHX 22:00WN 378	55m Phoenix	PHX 22:55 → ONT 00:10 +1WN 223	4h 35m	63%	38%
Southwest Details →	AUS 19:40 → PHX 20:05WN 4426	55m Phoenix	PHX 21:00 → ONT 22:15WN 2862	4h 35m	62%	37%

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 Fri, Oct 9 (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