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Flight records through . Security counts through .

Which SEA to STL flight is punctual? Alaska 618, 7:55 am.

92% on time across 79 flights in the last 3 months, never cancelled.

Find your flightSEA security
DepartsFlightOn time
7:55 amAS 61892%
9:00 amWN 363288%
1:06 pmAS 64784%
6:04 pmAS 61577%
4 of 4 regular flights, ranked by arrivals on time, June to August 2026.

Which airline is most reliable? Alaska, by a distance.

Alaska landed on time 85% of the time, Southwest 73%.

Flight records,

  • Alaska

    85%

    on time

    0.3% cancelled

  • Southwest

    73%

    on time

    1.0% cancelled

When do the flights leave? 4 regular flights, 7:55 am to 6:04 pm.

WN 3632 was cancelled most often, 2% of the time.

Flight records,

  1. AS 618 7:55 am, 0% cancelled 92%
  2. AS 647 1:06 pm, 0% cancelled 84%
  3. AS 615 6:04 pm, 0% cancelled 77%
  1. WN 3632 9:00 am, 2% cancelled 88%

What time should I fly? The 7 am departures.

95% landed on time; at 11 am, 63%. Tuesday was the best day, Thursday the worst.

Flight records,

DepartsLanded on time
7 am95%
8 am91%
9 am88%
11 am63%
12 pm72%
1 pm83%
5 pm91%
6 pm81%

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

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

Security counts,

4a8a12p4p8p
Mon
Tue
Wed
Thu
Fri
Sat
Sun
MonTueWedThuFriSatSun
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.