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Wednesday, October 7 · our forecast odds · issued Mon 9:00 AM ET · connections flying that day

Wed, Oct 7: Southwest via Nashville, leaving 08:27, is the safest bet: 94% chance of reaching San Antonio on time.

Best connections that day, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach San Antonio on time, from each leg’s forecast for the day. Total trip = scheduled departure to arrival (San Antonio is 1 h behind Boston). Layovers up to 4 hours. Pick a connection for its 12-month details.
SouthwestDetails → BOS 08:27 → BNA 10:03WN 725 2h 31m Nashville BNA 12:34 → SAT 14:49WN 1009 7h 22m 100% 94%
DeltaDetails → BOS 08:30 → CLE 10:35DL 5674 · flown by Republic 1h 21m Cleveland CLE 11:56 → SAT 14:12DL 816 6h 42m 98% 92%
DeltaDetails → BOS 05:30 → ATL 08:21DL 2242 3h 54m Atlanta ATL 12:15 → SAT 13:38DL 1408 9h 08m 100% 92%
UnitedDetails → BOS 05:45 → IAD 07:23UA 1734 1h 02m Dulles IAD 08:25 → SAT 10:59UA 1789 6h 14m 98% 91%
UnitedDetails → BOS 07:45 → DEN 10:19UA 647 3h 25m Denver DEN 13:44 → SAT 16:55UA 1022 10h 10m 100% 91%
UnitedDetails → BOS 06:00 → ORD 07:58UA 1414 1h 27m Chicago ORD 09:25 → SAT 12:29UA 490 7h 29m 99% 90%
DeltaDetails → BOS 06:05 → JFK 07:30DL 2611 1h 00m New York JFK 08:30 → SAT 11:42DL 1166 6h 37m 98% 89%
DeltaDetails → BOS 08:00 → ATL 10:51DL 923 2h 54m Atlanta ATL 13:45 → SAT 15:10DL 2009 8h 10m 99% 89%
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