Friday, October 9 · typical odds for a Friday (too early for a weather forecast) · issued Mon 12:00 PM ET · connections flying that day

Fri, Oct 9: one nonstop, WN 2737 at 14:40, with a 19% chance of arriving 15+ min late.

Nonstops that day

All 1 nonstop →


WN 2737 Southwest Flight history →	MDW 14:40	BOI 17:15	19%	4%	0.6%	58%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Boise on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (Boise 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	55m Denver	DEN 07:45 → BOI 09:45WN 818	5h 30m	97%	91%
Southwest Details →	MDW 05:20 → PHX 06:55WN 2858	1h 45m Phoenix	PHX 08:40 → BOI 11:45WN 4601	7h 25m	99%	89%
Delta Details →	MDW 06:00 → ATL 08:57DL 1285	1h 34m Atlanta	ATL 10:31 → BOI 12:53DL 874	7h 53m	97%	87%
Delta Details →	MDW 12:41 → ATL 15:43DL 2417	3h 47m Atlanta	ATL 19:30 → BOI 21:57DL 704	10h 16m	99%	78%
Southwest Details →	MDW 09:55 → DEN 11:30WN 2654	1h 20m Denver	DEN 12:50 → BOI 14:45WN 1491	5h 50m	95%	76%
Southwest Details →	MDW 10:05 → BUR 12:25WN 2741	3h 30m Burbank	BUR 15:55 → BOI 18:45WN 776	9h 40m	100%	74%
Southwest Details →	MDW 16:15 → DEN 18:00WN 2769	2h 55m Denver	DEN 20:55 → BOI 23:00WN 3806	7h 45m	95%	70%
Southwest Details →	MDW 18:40 → PHX 20:20WN 2862	2h 25m Phoenix	PHX 22:45 → BOI 01:50 +1WN 2554	8h 10m	96%	64%
Tight connection: often missed
Delta Details →	MDW 19:06 → MSP 20:51DL 4713 · flown by Endeavor	49m Minneapolis	MSP 21:40 → BOI 23:46DL 2488	5h 40m	52%	40%

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