Leave before 9 am: 88% depart on time. After 4 pm it’s 3 in 4.
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).
Airlines on this route
Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
| Alaska | 173 | 81% | 0.6% | 68 min |
| United | 1,904 | 80% | 1.2% | 74 min |
| Delta | 919 | 74% | 1.5% | 74 min |
| JetBlue | 1,736 | 74% | 2.4% | 82 min |
| Southwest | 1 | – | 0.0% | 49 min |
Dimmed: fewer than 150 flights in the year, too few to rank.
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 400 | SFO 07:10 | BOS 15:46 | 89% |
| UA 796 | SFO 21:25 | BOS 06:21 | 87% |
| B6 434 | SFO 06:00 | BOS 14:41 | 86% |
| UA 1665 | SFO 23:05 | BOS 08:01 | 84% |
| UA 2647 | SFO 08:10 | BOS 17:04 | 82% |
| · · · | |||
| DL 1655 | SFO 22:10 | BOS 06:45 | 69% |
| UA 2356 | SFO 10:05 | BOS 18:59 | 63% |
| DL 977 | SFO 12:20 | BOS 21:02 | 60% |
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.
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