4,425 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 3 in 4.

Best time to leave 6–7 am 96% arrive on time from SEA

Best single flight DL 3736 SEA 08:25 → SJC 10:49 · 91% on time Avoid AS 657 SEA 11:29 → SJC 13:40 · 77% 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).

SEA

% 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)	1,579	87%	0.2%	61 min
Alaska (incl. SkyWest, Horizon)	1,936	82%	1.0%	46 min
Southwest	905	73%	0.2%	45 min
American	4	–	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 3736flown by SkyWest	SEA 08:25	SJC 10:49	91%
AS 521	SEA 14:54	SJC 17:06	87%
DL 3789flown by SkyWest	SEA 11:45	SJC 14:11	84%
AS 1303	SEA 17:45	SJC 20:00	83%
DL 3956flown by SkyWest	SEA 20:30	SJC 22:48	79%
· · ·
AS 657	SEA 11:29	SJC 13:40	77%

All 25 flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.


WN 3626	SEA 06:45	SJC 08:55	2h 10m	33	94%	0.0%	64 min
AS 1448	SEA 07:07	SJC 09:23	2h 16m	51	98%	0.0%	45 min
AS 2186flown by Horizon	SEA 07:10	SJC 09:22	2h 12m	28	100%	0.0%	–
WN 3232	SEA 07:30	SJC 09:45	2h 15m	16	81%	0.0%	35 min
DL 3736flown by SkyWest	SEA 08:25	SJC 10:49	2h 24m	224	91%	0.0%	83 min
AS 582	SEA 10:00	SJC 12:20	2h 20m	49	87%	6.1%	38 min
AS 335	SEA 11:08	SJC 13:20	2h 12m	66	69%	1.5%	38 min
AS 657	SEA 11:29	SJC 13:40	2h 11m	218	77%	0.0%	39 min
DL 3789flown by SkyWest	SEA 11:45	SJC 14:11	2h 26m	349	84%	0.0%	61 min
WN 4960	SEA 13:30	SJC 15:55	2h 25m	26	35%	0.0%	39 min
AS 1366	SEA 14:18	SJC 16:32	2h 14m	37	89%	0.0%	44 min
DL 3897flown by SkyWest	SEA 14:45	SJC 17:04	2h 19m	86	85%	0.0%	47 min
AS 521	SEA 14:54	SJC 17:06	2h 12m	184	87%	1.1%	58 min
WN 4130	SEA 15:25	SJC 17:35	2h 10m	16	6%	0.0%	56 min
AS 319	SEA 15:42	SJC 17:53	2h 11m	51	51%	0.0%	59 min
AS 539	SEA 17:45	SJC 20:00	2h 15m	52	79%	0.0%	39 min
AS 1303	SEA 17:45	SJC 20:00	2h 15m	205	83%	0.5%	37 min
DL 4132flown by SkyWest	SEA 17:45	SJC 20:03	2h 18m	73	86%	0.0%	70 min
DL 4100flown by SkyWest	SEA 17:50	SJC 20:12	2h 22m	134	87%	0.7%	61 min
WN 635	SEA 18:55	SJC 21:08	2h 12m	16	44%	0.0%	63 min
WN 2040	SEA 20:10	SJC 22:28	2h 18m	26	35%	0.0%	52 min
AS 1310	SEA 20:25	SJC 22:40	2h 15m	128	80%	0.8%	51 min
DL 3956flown by SkyWest	SEA 20:30	SJC 22:48	2h 17m	200	79%	0.5%	51 min
AS 761	SEA 21:20	SJC 23:31	2h 11m	141	77%	0.7%	45 min
AS 523	SEA 21:43	SJC 23:59	2h 16m	14	57%	0.0%	53 min

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	SJC	2h 20m	87%	0.2%	1,579	Flying now
Alaska	SEA	SJC	2h 14m	82%	1.0%	1,936	Flying now
Southwest	SEA	SJC	2h 15m	73%	0.2%	905	Flying now
American	SEA	SJC	–	100%few flights	0.0%	4	Not flying now
United	SEA	SJC	–	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