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Flight records through . Security counts through .

Which STL to SAT flight is punctual? Southwest 4166, 8:45 pm.

82% on time across 22 flights in the last 3 months, never cancelled.

Find your flightSTL security

  • WN 4166

    82%

    on time

    8:45 pm

    0% cancelled

  • WN 3978

    74%

    on time

    8:10 am

    0% cancelled

  • WN 3979

    61%

    on time

    10:15 pm

    0% cancelled

3 regular flights, June to August 2026.

When do the flights leave? 3 regular flights, 8:10 am to 10:15 pm.

None was cancelled in the last 3 months.

Flight records,

  1. WN 3978 8:10 am, 0% cancelled 74%
  2. WN 4166 8:45 pm, 0% cancelled 82%
  3. WN 3979 10:15 pm, 0% cancelled 61%

What time should I fly? The 9 am departures.

92% landed on time; at 10 pm, 62%. Tuesday was the best day, Sunday the worst.

Flight records,

DepartsLanded on time
8 am90%
9 am92%
10 am89%
8 pm76%
9 pm64%
10 pm62%

When is STL security busiest? 5 am, then 7 am.

Calmest around 5 pm. St. Louis 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

1,760

people screened, all terminals.