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4,735 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 88% depart on time. After 4 pm it’s 3 in 5.

Best time to leave 5–6 am 90% 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).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
BOS
94
91
86
88
70
80
76
79
83
67
64
65
58
49
59
73
% 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
San Francisco flights leaving BOS 2–3 pm: 1Close ×
B6 933 BOS 14:40 SFO 18:20 6h 40m 41 71% 0.0% 45 min

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
United 1,905 76% 1.3% 68 min
Delta 918 72% 1.5% 65 min
JetBlue 1,738 70% 1.8% 69 min
Alaska 173 61% 0.6% 71 min
Southwest 1 – 0.0% –

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.
UA 2441 BOS 06:00 SFO 09:27 86%
B6 1333 BOS 06:35 SFO 10:08 85%
B6 1833 BOS 09:50 SFO 13:23 83%
DL 977 BOS 07:20 SFO 10:59 82%
UA 1074 BOS 11:35 SFO 15:02 80%
· · ·
B6 733 BOS 17:00 SFO 20:34 59%
B6 333 BOS 20:55 SFO 00:31 59%
UA 2400 BOS 18:10 SFO 21:47 57%
All 23 flights on this route →

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
Delta BOS SFO 6h 47m 72% 1.5% 918 Flying now
JetBlue BOS SFO 6h 36m 70% 1.8% 1,738 Flying now
Alaska BOS SFO 6h 40m 61% 0.6% 173 Not flying now
Southwest BOS SFO – 100%few flights 0.0% 1 Not 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