Wednesday, October 7 · our forecast odds · issued Mon 2:00 PM ET · connections flying that day

Wed, Oct 7: one nonstop, WN 3338 at 07:43, with a 3% chance of arriving 15+ min late.

Nonstops that day


WN 3338 Southwest	PWM 07:43	MDW 09:15	3%	1%	0.6%	no record

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	PWM 12:40 → DTW 14:40DL 426	3h 29m Detroit	DTW 18:09 → MDW 18:32DL 4677 · flown by Endeavor	6h 52m	99%	92%
Delta Details →	PWM 11:47 → MSP 13:49DL 1766	3h 12m Minneapolis	MSP 17:01 → MDW 18:42DL 4714 · flown by Endeavor	7h 55m	100%	91%
Delta Details →	PWM 06:00 → ATL 08:45DL 1515	2h 15m Atlanta	ATL 11:00 → MDW 11:56DL 2417	6h 56m	99%	90%
Southwest Details →	PWM 13:06 → BWI 14:51WN 146	2h 51m Baltimore	BWI 17:42 → MDW 18:45WN 1195	6h 39m	100%	88%

How these are worked out. Each flight’s odds are our forecast for that day; 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