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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

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

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