The best bet has a stop: United via Dulles (6h 14m) reaches San Antonio on time 9 times in 10, against 76% on the nonstop.
Time of day × airport
Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).
Pick an hour to see this route’s flights leaving then.
Airlines on this route
Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
| Delta | 356 | 78% | 2.2% | 88 min |
Flights, best and worst
Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
| DL 2652 | BOS 10:30 | SAT 14:03 | 81% |
Nonstops by airline and airport
Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
| Delta | BOS | SAT | 4h 33m | 78% | 2.2% | 356 | Flying now |
Alternatives with one stop
All connections →| UnitedDetails → | BOS 05:45 → IAD 07:23UA 1734 | 1h 02m Dulles | IAD 08:25 → SAT 10:59UA 1789 | 6h 14m | 97% | 89% |
| DeltaDetails → | BOS 06:06 → JFK 07:25DL 2611 | 1h 12m New York | JFK 08:37 → SAT 11:50DL 1166 | 6h 44m | 96% | 81% |
| DeltaDetails → | BOS 05:30 → ATL 08:15DL 2242 | 1h 27m Atlanta | ATL 09:42 → SAT 11:10DL 1121 | 6h 40m | 100% | 80% |
About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON