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Tuesday, October 6 · our forecast odds · issued Mon 11:00 AM ET · connections flying that day

Tomorrow: Delta via Atlanta, leaving 05:40, is the safest bet: 80% chance of reaching San Juan on time.

Nonstops that day

All 2 nonstops →
UA 701 United Flight history → IAH 15:03 SJU 20:38 13% 3% 0.6% 91%
UA 1192 United Flight history → IAH 10:03 SJU 15:42 16% 3% 0.6% 79%

Best connections that day, one ticket

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

UnitedDetails → IAH 05:15 → DEN 06:47UA 1874 2h 56m Denver DEN 09:43 → SJU 17:38UA 1339 11h 23m 99% 87%
DeltaDetails → IAH 07:00 → ATL 10:04DL 1315 2h 56m Atlanta ATL 13:00 → SJU 16:39DL 1946 8h 39m 99% 87%
DeltaDetails → IAH 12:09 → ATL 15:21DL 1682 3h 24m Atlanta ATL 18:45 → SJU 22:30DL 1861 9h 21m 100% 85%
AmericanDetails → IAH 05:19 → MIA 08:55AA 2144 1h 57m Miami MIA 10:52 → SJU 13:46AA 1976 7h 27m 96% 84%
AmericanDetails → IAH 06:05 → CLT 09:35AA 3162 1h 28m Charlotte CLT 11:03 → SJU 14:50AA 783 7h 45m 94% 81%
DeltaDetails → IAH 05:40 → ATL 08:50DL 1069 55m Atlanta ATL 09:45 → SJU 13:32DL 1882 6h 52m 93% 80%
AmericanDetails → IAH 05:02 → DFW 06:19AA 2551 3h 03m Dallas-Fort Worth DFW 09:22 → SJU 15:21AA 702 9h 19m 98% 79%
AmericanDetails → IAH 07:35 → MIA 11:20AA 1347 3h 25m Miami MIA 14:45 → SJU 17:21AA 967 8h 46m 97% 79%
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 Tue, Oct 6 (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