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Flight records through . Security counts through .

Which STL to IAD flight is punctual? United 4506, 8:43 am.

87% on time across 91 flights in the last 3 months, never cancelled.

Find your flightSTL security

  • UA 4506

    87%

    on time

    8:43 am

    0% cancelled

  • UA 4454

    80%

    on time

    12:55 pm

    2% cancelled

2 regular flights, June to August 2026.

When do the flights leave? 2 regular flights, 8:43 am to 12:55 pm.

UA 4454 was cancelled most often, 2% of the time.

Flight records,

  1. UA 4506 8:43 am, 0% cancelled 87%
  2. UA 4454 12:55 pm, 2% cancelled 80%

What time should I fly? The 8 am departures.

81% landed on time; at 1 pm, 65%. Wednesday was the best day, Saturday the worst.

Flight records,

DepartsLanded on time
8 am81%
12 pm74%
1 pm65%

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.