Showing Southwest only (incl. its regional partners)All airlines ×
1 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines
No nonstop, and no clear pattern: the best connection reaches Boston on time 9 times in 10.
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.
No Southwest flight on this route ran 150+ times in the year.
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.
| Southwest | SFO | BOS | – | 0%few flights | 0.0% | 1 | Not flying now |
Alternatives with one stop
All connections →| SouthwestDetails → | SFO 23:40 → MDW 05:55WN 3649 | 3h 15m Chicago | MDW 09:10 → BOS 12:28 +1WN 1405 | 9h 48m | 100% | 90% |
| SouthwestDetails → | SFO 21:10 → BWI 05:25WN 2683 | 2h 50m Baltimore | BWI 08:15 → BOS 09:50 +1WN 884 | 9h 40m | 98% | 84% |
| SouthwestDetails → | SFO 05:10 → DEN 08:40WN 1424 | 1h 20m Denver | DEN 10:00 → BOS 16:05WN 3690 | 7h 55m | 96% | 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