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Thursday, October 8 · typical odds for a Thursday (too early for a weather forecast) · issued Sun 12:00 PM ET · connections flying that day

Thu, Oct 8: Delta via Atlanta, leaving 05:20, is the safest bet: 87% chance of reaching San Juan on time.

Nonstops that day

All 1 nonstop →
AA 702 American Flight history → DFW 09:26 SJU 15:31 20% 5% 0.7% 61%

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

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 Dallas-Fort Worth). Layovers up to 4 hours. Pick a connection for its 12-month details.
DeltaDetails → DFW 05:20 → ATL 08:34DL 401 1h 11m Atlanta ATL 09:45 → SJU 13:32DL 1882 7h 12m 98% 87%
UnitedDetails → DFW 05:45 → DEN 06:54UA 773 2h 49m Denver DEN 09:43 → SJU 17:38UA 1339 10h 53m 100% 85%
DeltaDetails → DFW 12:17 → ATL 15:35DL 961 3h 10m Atlanta ATL 18:45 → SJU 22:29DL 1861 9h 12m 100% 85%
DeltaDetails → DFW 06:45 → ATL 09:59DL 893 3h 01m Atlanta ATL 13:00 → SJU 16:39DL 1946 8h 54m 99% 84%
UnitedDetails → DFW 09:46 → IAH 11:03UA 1586 4h 00m Houston IAH 15:03 → SJU 20:38UA 701 9h 52m 98% 84%
UnitedDetails → DFW 05:10 → IAH 06:22UA 2260 3h 41m Houston IAH 10:03 → SJU 15:42UA 1192 9h 32m 99% 83%
AmericanDetails → DFW 05:00 → MIA 08:55AA 3189 2h 32m Miami MIA 11:27 → SJU 14:21AA 1613 8h 21m 100% 83%
AmericanDetails → DFW 04:55 → CLT 08:38AA 1091 2h 25m Charlotte CLT 11:03 → SJU 14:50AA 783 8h 55m 98% 82%
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 Thu, Oct 8 (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