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 1230 at 12:30, with a 18% chance of arriving 15+ min late.

Nonstops that day

All 1 nonstop →


WN 1230 Southwest Flight history →	MDW 12:30	COS 14:00	18%	4%	0.6%	69%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Colorado Springs on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Colorado Springs is 1 h behind Chicago). Layovers up to 4 hours. Pick a connection for its 12-month details.


Southwest Details →	MDW 05:15 → DEN 06:50WN 2989	1h 10m Denver	DEN 08:00 → COS 08:55WN 3419	4h 40m	100%	92%
Delta Details →	MDW 06:00 → ATL 08:57DL 1285	2h 33m Atlanta	ATL 11:30 → COS 12:32DL 2427	7h 32m	98%	82%
Southwest Details →	MDW 05:20 → PHX 06:55WN 2858	50m Phoenix	PHX 07:45 → COS 10:30WN 4142	6h 10m	92%	80%
Southwest Details →	MDW 06:40 → DAL 09:00WN 3796	2h 05m Dallas	DAL 11:05 → COS 12:00WN 3257	6h 20m	100%	79%
Southwest Details →	MDW 09:55 → DEN 11:30WN 2654	1h 50m Denver	DEN 13:20 → COS 14:05WN 1228	5h 10m	99%	66%
Southwest Details →	MDW 10:10 → HOU 12:50WN 2783	1h 50m Houston	HOU 14:40 → COS 16:00WN 4385	6h 50m	96%	61%
Southwest Details →	MDW 16:15 → DEN 18:00WN 2769	2h 55m Denver	DEN 20:55 → COS 21:50WN 3811	6h 35m	95%	59%
Southwest Details →	MDW 18:40 → PHX 20:20WN 2862	2h 20m Phoenix	PHX 22:40 → COS 01:25 +1WN 4878	7h 45m	96%	58%
Tight connection: often missed
Southwest Details →	MDW 11:00 → DEN 12:30WN 2960	50m Denver	DEN 13:20 → COS 14:05WN 1228	4h 05m	72%	48%
Southwest Details →	MDW 16:55 → LAS 18:45WN 2797	1h 05m Las Vegas	LAS 19:50 → COS 22:45WN 4487	6h 50m	71%	41%

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