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6,800 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 72%.

Best time to leave 5–6 am 95% arrive on time from SFO
Best single flight DL 2721 SFO 05:55 → SEA 08:11 · 95% on time Avoid AS 656 SFO 10:18 → SEA 12:27 · 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
22
SFO
96
95
93
90
82
62
78
73
76
75
60
77
60
73
83
70
68
64
% 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
Seattle flights leaving SFO 5–6 pm: 2Close ×
DL 3707flown by SkyWest SFO 17:30 SEA 19:50 2h 20m 331 68% 1.2% 48 min
AS 758 SFO 17:38 SEA 19:47 2h 09m 266 73% 0.4% 51 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 (incl. SkyWest) 2,330 77% 0.5% 59 min
Delta (incl. SkyWest) 1,748 76% 1.4% 64 min
Alaska (incl. SkyWest, Horizon) 2,719 71% 1.3% 55 min
Southwest 3 – 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 2721 SFO 05:55 SEA 08:11 95%
AS 580 SFO 12:54 SEA 15:08 80%
DL 1412 SFO 13:38 SEA 15:59 77%
UA 2279 SFO 16:27 SEA 18:47 76%
AS 758 SFO 17:38 SEA 19:47 73%
· · ·
DL 3991flown by SkyWest SFO 20:59 SEA 23:24 67%
UA 1007 SFO 20:54 SEA 23:19 66%
AS 656 SFO 10:18 SEA 12:27 57%
All 30 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 SFO SEA 2h 18m 77% 0.5% 2,330 Flying now
Delta SFO SEA 2h 20m 76% 1.4% 1,748 Flying now
Alaska SFO SEA 2h 15m 71% 1.3% 2,719 Flying now
Southwest SFO SEA – 100%few flights 0.0% 3 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