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Flight records through . Security counts through .

Which SJU to STL flight is punctual? Southwest 3931, 3:35 pm.

75% on time across 8 flights in the last 3 months, never cancelled.

Find your flightSJU security

  • WN 3931

    75%

    on time

    3:35 pm

    0% cancelled

1 regular flight, June to August 2026. Few flights on this route, so these shares move a lot from month to month.

When do the flights leave? One regular flight, at 3:35 pm.

None was cancelled in the last 3 months.

Flight records,

  1. WN 3931 3:35 pm, 0% cancelled 75%

When is SJU security busiest? 11 am to 2 pm daily.

Calmest around 5 pm. San Juan 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

Monday, 1 pm

1,700

people screened, all terminals.