Sunday, October 11 · typical odds for a Sunday (too early for a weather forecast) · issued Mon 12:00 AM ET · connections flying that day

Sun, Oct 11: Delta via Atlanta, leaving 06:00, is the safest bet: 80% chance of reaching Dallas on time.

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

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


Delta Details →	IAD 06:00 → ATL 07:43DL 2127	2h 32m Atlanta	ATL 10:15 → DAL 11:24DL 1115	6h 24m	98%	80%
Delta Details →	IAD 08:27 → ATL 10:18DL 3080	3h 41m Atlanta	ATL 13:59 → DAL 15:03DL 512	7h 36m	99%	78%
Delta Details →	IAD 12:39 → ATL 14:30DL 1444	2h 14m Atlanta	ATL 16:44 → DAL 17:54DL 2780	6h 15m	96%	70%
Delta Details →	IAD 15:45 → ATL 17:36DL 2135	3h 39m Atlanta	ATL 21:15 → DAL 22:25DL 1104	7h 40m	95%	67%

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 Sun, Oct 11 (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