Skip to content

Flight records through August 2026. Security counts through October 31, 2026.

Which SEA to SJC flight is punctual? Alaska 1448, 7:07 am.

97% on time across 69 flights in the last 3 months, never cancelled.

Find your flight SEA security

SEA to SJC flights that landed on time most often
Departs	Flight	On time
7:07 am	AS 1448	97%
8:30 am	DL 3736	92%
6:45 am	WN 3626	89%
5:50 pm	DL 4100	83%
4:32 pm	AS 521	82%
2:45 pm	DL 3897	82%
11:45 am	DL 3789	81%
2:18 pm	AS 1366	78%

8 of 18 regular flights, ranked by arrivals on time, June to August 2026.

Which airline is most reliable? Delta, ahead of Alaska.

Delta landed on time 86% of the time, Alaska 79%.

Flight records, September 2025 to August 2026

Delta

86%

on time

0.2% cancelled
Alaska

79%

on time

1.0% cancelled
Southwest

70%

on time

0.2% cancelled

When do the flights leave? 18 regular flights, 6:45 am to 9:43 pm.

AS 1366 was cancelled most often, 2% of the time.

Flight records, June to August 2026

DL 3736 8:30 am, 0% cancelled 92%
DL 3789 11:45 am, 0% cancelled 81%
DL 3897 2:45 pm, 0% cancelled 82%
DL 4100 5:50 pm, 0% cancelled 83%
DL 3956 8:30 pm, 0% cancelled 67%

AS 1448 7:07 am, 0% cancelled 97%
AS 335 11:08 am, 1% cancelled 65%
AS 1366 2:18 pm, 2% cancelled 78%
AS 319 3:42 pm, 0% cancelled 45%
AS 521 4:32 pm, 0% cancelled 82%
AS 539 5:45 pm, 0% cancelled 73%
AS 1303 5:46 pm, 0% cancelled 59%
AS 1310 8:06 pm, 1% cancelled 74%
AS 523 9:43 pm, 0% cancelled 50%

WN 3626 6:45 am, 0% cancelled 89%
WN 4960 1:30 pm, 0% cancelled 26%
WN 4517 7:30 pm, 0% cancelled 70%
WN 2040 8:10 pm, 0% cancelled 33%

What time should I fly? The 6 am departures.

94% landed on time; at 9 pm, 61%. Wednesday was the best day, Friday the worst.

Flight records, September 2025 to August 2026

Share of SEA to SJC flights landing less than 15 minutes late, by scheduled departure hour
Departs	Bar	Landed on time
6 am		94%
7 am		90%
8 am		92%
9 am		88%
10 am		82%
11 am		75%
12 pm		78%
1 pm		80%
2 pm		82%
3 pm		70%
4 pm		85%
5 pm		78%
6 pm		74%
7 pm		78%
8 pm		67%
9 pm		61%

When is SEA security busiest? 6 to 10 every morning.

Calmest around 5 pm. Seattle security, hour by hour.

Security counts, 8 weeks to October 31, 2026

People screened per hour at SEA checkpoints, by weekday and hour; choose a cell to read it
	4a				8a				12p				4p				8p
Mon
Tue
Wed
Thu
Fri
Sat
Sun

People screened per hour at SEA checkpoints, by weekday and hour; choose a cell to read it
	Mon	Tue	Wed	Thu	Fri	Sat	Sun
4a
5a
6a
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
11p

Friday, 7 am

4,660

people screened, all terminals.