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: Delta via Atlanta, leaving 11:48, is the safest bet: 77% chance of reaching West Palm Beach on time.

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach West Palm Beach on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (West Palm Beach is 3 h ahead of Ontario). Layovers up to 4 hours. Pick a connection for its 12-month details.


Delta Details →	ONT 11:48 → ATL 19:15DL 665	3h 44m Atlanta	ATL 22:59 → PBI 00:51 +1DL 1065	10h 03m	99%	77%
United Details →	ONT 05:45 → IAH 11:04UA 1936	1h 21m Houston	IAH 12:25 → PBI 15:56UA 1345	7h 11m	97%	71%
Delta Details →	ONT 07:05 → ATL 14:23DL 761	2h 17m Atlanta	ATL 16:40 → PBI 18:36DL 959	8h 31m	98%	69%
American Details →	ONT 10:25 → DFW 15:37AA 2238	3h 13m Dallas-Fort Worth	DFW 18:50 → PBI 22:48AA 2467	9h 23m	98%	65%
American Details →	ONT 05:34 → DFW 10:41AA 1412	2h 48m Dallas-Fort Worth	DFW 13:29 → PBI 17:19AA 2282	8h 45m	98%	60%

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