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4,596 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 9 in 10 depart on time. After 4 pm it’s 73%.

Best time to leave 7–8 am 90% arrive on time from SEA
Best single flight DL 2508 SEA 07:15 → SAN 10:08 · 91% on time Avoid AS 623 SEA 16:47 → SAN 19:38 · 73% 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
SEA
90
91
84
81
75
78
78
79
79
76
58
76
73
74
76
% 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 Diego flights leaving SEA 9–10 pm: 2Close ×
AS 1472 SEA 21:04 SAN 23:56 2h 52m 34 79% 0.0% 68 min
AS 1369 SEA 21:09 SAN 23:59 2h 50m 113 83% 0.0% 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 1,704 83% 1.0% 55 min
Alaska (incl. SkyWest, Horizon) 2,743 75% 1.1% 46 min
Southwest 149 – 0.0% 43 min

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 2508 SEA 07:15 SAN 10:08 91%
AS 1367 SEA 07:26 SAN 10:22 91%
DL 2613 SEA 15:25 SAN 18:13 84%
AS 621 SEA 11:59 SAN 15:00 82%
DL 2533 SEA 09:45 SAN 12:38 82%
· · ·
AS 697 SEA 15:02 SAN 17:53 78%
DL 2672 SEA 19:45 SAN 22:38 75%
AS 623 SEA 16:47 SAN 19:38 73%
All 26 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 SAN 2h 53m 83% 1.0% 1,704 Flying now
Alaska SEA SAN 2h 54m 75% 1.1% 2,743 Flying now
Southwest SEA SAN 2h 50m 54% 0.0% 149 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