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4,422 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 78%.

Best time to leave 6–7 am 97% arrive on time from SJC
Best single flight DL 4041 SJC 07:20 → SEA 09:49 · 95% on time Avoid AS 762 SJC 08:00 → SEA 10:20 · 78% 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).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
SJC
98
96
88
89
91
92
80
76
80
82
88
79
81
71
75
63
% 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 SJC 8–9 pm: 3Close ×
AS 1304 SJC 20:15 SEA 22:37 2h 22m 142 79% 0.7% 41 min
DL 4132flown by SkyWest SJC 20:50 SEA 23:20 2h 30m 31 97% 0.0% 16 min
DL 4100flown by SkyWest SJC 20:59 SEA 23:25 2h 26m 168 88% 0.6% 60 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) 1,579 89% 0.2% 66 min
Alaska (incl. SkyWest, Horizon) 1,934 82% 1.2% 52 min
Southwest 906 78% 0.0% 45 min
American 2 – 0.0% –
United 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.
DL 4041flown by SkyWest SJC 07:20 SEA 09:49 95%
DL 3736flown by SkyWest SJC 11:29 SEA 13:59 92%
AS 1311 SJC 10:19 SEA 12:30 91%
DL 4100flown by SkyWest SJC 20:59 SEA 23:25 88%
DL 3789flown by SkyWest SJC 14:51 SEA 17:14 85%
· · ·
AS 523 SJC 18:00 SEA 20:18 85%
AS 745 SJC 14:34 SEA 16:51 83%
AS 762 SJC 08:00 SEA 10:20 78%
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.
Delta SJC SEA 2h 25m 89% 0.2% 1,579 Flying now
Alaska SJC SEA 2h 17m 82% 1.2% 1,934 Flying now
Southwest SJC SEA 2h 15m 78% 0.0% 906 Flying now
American SJC SEA – 100%few flights 0.0% 2 Not flying now
United SJC SEA – 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