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Showing United only (incl. its regional partners)All airlines ×
1,905 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 58%.

Best time to leave 10–11 am 92% arrive on time from BOS
Best single flight UA 2441 BOS 06:00 → SFO 09:27 · 86% on time Avoid UA 2400 BOS 18:10 → SFO 21:47 · 57% 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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BOS
94
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87
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67
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% 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.
UA 2441 BOS 06:00 SFO 09:27 86%
UA 1074 BOS 11:35 SFO 15:02 80%
UA 2400 BOS 18:10 SFO 21:47 57%

All 9 United 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.
UA 2441 BOS 06:00 SFO 09:27 6h 27m 313 86% 1.0% 46 min
UA 2623 BOS 07:28 SFO 10:55 6h 27m 56 82% 0.0% 42 min
UA 323 BOS 07:28 SFO 10:55 6h 27m 37 86% 0.0% 27 min
UA 2002 BOS 09:07 SFO 12:34 6h 27m 72 56% 0.0% 66 min
UA 1074 BOS 11:35 SFO 15:02 6h 27m 258 80% 0.4% 72 min
UA 440 BOS 16:15 SFO 19:49 6h 34m 35 49% 0.0% 74 min
UA 512 BOS 16:15 SFO 19:49 6h 34m 37 69% 2.7% 77 min
UA 2400 BOS 18:10 SFO 21:47 6h 37m 318 57% 1.6% 82 min
UA 2107 BOS 20:20 SFO 23:57 6h 37m 84 58% 2.4% 55 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.
United BOS SFO 6h 34m 76% 1.3% 1,905 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