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

Which SEA to BOI flight is punctual? Delta 3750, 7:15 am.

97% on time across 92 flights in the last 3 months, never cancelled.

Find your flight SEA security

SEA to BOI flights that landed on time most often
Departs	Flight	On time
7:15 am	DL 3750	97%
8:35 am	DL 3678	91%
7:07 am	AS 248	90%
12:30 pm	DL 3959	89%
2:54 pm	DL 4127	82%
7:59 pm	AS 2034	81%
10:12 am	AS 428	80%
4:10 pm	DL 3688	79%

8 of 17 regular flights, ranked by arrivals on time, June to August 2026.

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

Delta landed on time 88% of the time, Alaska 82%.

Flight records, September 2025 to August 2026

Delta

88%

on time

0.2% cancelled
Alaska

82%

on time

0.5% cancelled

When do the flights leave? 17 regular flights, 7:07 am to 9:31 pm.

AS 2230 was cancelled most often, 2% of the time.

Flight records, June to August 2026

DL 3750 7:15 am, 0% cancelled 97%
DL 3678 8:35 am, 0% cancelled 91%
DL 3959 12:30 pm, 0% cancelled 89%
DL 4127 2:54 pm, 0% cancelled 82%
DL 3688 4:10 pm, 0% cancelled 79%
DL 3692 7:50 pm, 0% cancelled 79%
DL 4090 9:20 pm, 0% cancelled 72%

AS 248 7:07 am, 0% cancelled 90%
AS 2230 9:59 am, 2% cancelled 76%
AS 428 10:12 am, 0% cancelled 80%
AS 2106 11:36 am, 1% cancelled 53%
AS 441 12:55 pm, 1% cancelled 79%
AS 467 1:04 pm, 0% cancelled 73%
AS 2061 3:45 pm, 0% cancelled 79%
AS 2109 5:40 pm, 0% cancelled 71%
AS 2034 7:59 pm, 0% cancelled 81%
AS 463 9:31 pm, 0% cancelled 61%

What time should I fly? The 7 am departures.

91% landed on time; at 11 am, 76%. Saturday was the best day, Thursday the worst.

Flight records, September 2025 to August 2026

Share of SEA to BOI flights landing less than 15 minutes late, by scheduled departure hour
Departs	Bar	Landed on time
7 am		91%
8 am		90%
9 am		85%
10 am		87%
11 am		76%
12 pm		86%
1 pm		88%
2 pm		82%
3 pm		84%
4 pm		84%
5 pm		84%
6 pm		82%
7 pm		82%
8 pm		82%
9 pm		80%

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.