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919 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 94% depart on time. After 4 pm it’s 2 in 3.

Best time to leave 7–8 am 89% arrive on time from SFO
Best single flight DL 400 SFO 07:10 → BOS 15:46 · 89% on time Avoid DL 977 SFO 12:20 → BOS 21:02 · 60% on time

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).

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SFO
94
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69
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Pick an hour to see this route’s flights leaving then.

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%
DL 1655 SFO 22:10 BOS 06:45 69%
DL 977 SFO 12:20 BOS 21:02 60%

All 4 Delta flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
DL 400 SFO 07:10 BOS 15:46 5h 36m 364 89% 1.6% 88 min
DL 977 SFO 12:20 BOS 21:02 5h 42m 199 60% 2.0% 75 min
DL 860 SFO 15:00 BOS 23:40 5h 40m 42 37% 0.0% 56 min
DL 1655 SFO 22:10 BOS 06:45 5h 35m 173 69% 1.7% 62 min

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 SFO BOS 5h 40m 74% 1.5% 919 Flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

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