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 San Francisco on time almost half the time.
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 | BOS | SFO | – | 100%few flights | 0.0% | 1 | Not flying now |
Alternatives with one stop
All connections →| SouthwestDetails → | BOS 16:45 → MDW 18:35WN 4106 | 2h 55m Chicago | MDW 21:30 → SFO 00:12 +1WN 2893 | 10h 27m | 95% | 46% |
| SouthwestDetails → | BOS 06:25 → DEN 08:50WN 4156 | 2h 50m Denver | DEN 11:40 → SFO 13:20WN 1719 | 9h 55m | 100% | 14% |
| SouthwestDetails → | BOS 05:25 → MDW 07:00WN 3239 | 3h 05m Chicago | MDW 10:05 → SFO 12:35WN 1546 | 10h 10m | 100% | 12% |
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