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6,796 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

No clear winner: airlines and hours on this route all land within a few points of 63% on time.

Best time to leave 5–6 am 92% arrive on time from SEA
Best single flight DL 2635 SEA 21:45 → SFO 00:06 · 71% on time Avoid AS 725 SEA 07:03 → SFO 09:20 · 52% 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
SEA
94
98
64
60
68
57
67
84
75
78
72
76
68
52
60
60
70
% 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 SEA 4–5 pm: 1Close ×
AS 1385 SEA 16:36 SFO 18:48 2h 12m 233 71% 1.3% 41 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.
Delta (incl. SkyWest) 1,747 67% 1.4% 57 min
United (incl. SkyWest) 2,327 65% 0.8% 69 min
Alaska (incl. SkyWest, Horizon) 2,718 59% 1.2% 54 min
Southwest 4 – 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.
DL 2635 SEA 21:45 SFO 00:06 71%
AS 1385 SEA 16:36 SFO 18:48 71%
DL 3707flown by SkyWest SEA 14:30 SFO 16:50 71%
UA 1482 SEA 10:29 SFO 12:47 71%
AS 655 SEA 11:42 SFO 14:04 70%
· · ·
AS 688 SEA 17:59 SFO 20:16 55%
AS 528 SEA 08:53 SFO 11:09 54%
AS 725 SEA 07:03 SFO 09:20 52%
All 33 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.
Delta SEA SFO 2h 21m 67% 1.4% 1,747 Flying now
United SEA SFO 2h 18m 65% 0.8% 2,327 Flying now
Alaska SEA SFO 2h 16m 59% 1.2% 2,718 Flying now
Southwest SEA SFO – 100%few flights 0.0% 4 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