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Flight records through . Security counts through .

Which IAH to SDF flight is punctual? United 3990, 8:30 am.

90% on time across 92 flights in the last 3 months, never cancelled.

Find your flightIAH security

  • UA 3990

    90%

    on time

    8:30 am

    0% cancelled

  • UA 4052

    82%

    on time

    6:49 pm

    0% cancelled

  • UA 4050

    80%

    on time

    4:35 pm

    1% cancelled

3 regular flights, June to August 2026.

When do the flights leave? 3 regular flights, 8:30 am to 6:49 pm.

UA 4050 was cancelled most often, 1% of the time.

Flight records,

  1. UA 3990 8:30 am, 0% cancelled 90%
  2. UA 4050 4:35 pm, 1% cancelled 80%
  3. UA 4052 6:49 pm, 0% cancelled 82%

What time should I fly? The 8 am departures.

87% landed on time; at 6 pm, 82%. Thursday was the best day, Monday the worst.

Flight records,

DepartsLanded on time
8 am87%
9 am84%
10 am85%
4 pm84%
6 pm82%

When is IAH security busiest? 6 am, then 8 am.

Calmest around 9 am. Houston IAH 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, 6 am

4,540

people screened, all terminals.