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Flight records through . Security counts through .

Which IAH to ATL flight is punctual? Delta 1069, 5:40 am.

96% on time across 92 flights in the last 3 months, 2.2% cancelled.

Find your flightIAH security
DepartsFlightOn time
5:40 amDL 106996%
7:00 amDL 131589%
7:20 amUA 103086%
8:05 amDL 64485%
11:55 amUA 407977%
12:07 pmUA 403276%
12:12 pmDL 168274%
9:42 amDL 158574%
8 of 19 regular flights, ranked by arrivals on time, June to August 2026.

Which airline is most reliable? United and Delta, neck and neck.

United landed on time 80% of the time, Delta 79%.

Flight records,

  • United

    80%

    on time

    0.5% cancelled

  • Delta

    79%

    on time

    2.0% cancelled

  • Frontier

    60%

    on time

    2.5% cancelled

When do the flights leave? 19 regular flights, 5:40 am to 8:02 pm.

F9 4106 was cancelled most often, 7% of the time.

Flight records,

  1. UA 1030 7:20 am, 0% cancelled 86%
  2. UA 4079 11:55 am, 0% cancelled 77%
  3. UA 4032 12:07 pm, 0% cancelled 76%
  4. UA 1211 2:40 pm, 0% cancelled 56%
  5. UA 2050 6:05 pm, 0% cancelled 45%
  6. UA 2110 6:05 pm, 0% cancelled 50%
  7. UA 1260 6:08 pm, 0% cancelled 67%
  1. DL 1069 5:40 am, 2% cancelled 96%
  2. DL 1315 7:00 am, 0% cancelled 89%
  3. DL 644 8:05 am, 1% cancelled 85%
  4. DL 1585 9:42 am, 6% cancelled 74%
  5. DL 1682 12:12 pm, 0% cancelled 74%
  6. DL 1572 2:37 pm, 1% cancelled 65%
  7. DL 2890 4:37 pm, 0% cancelled 68%
  8. DL 1223 6:36 pm, 0% cancelled 56%
  1. F9 1404 6:00 am, 4% cancelled 68%
  2. F9 4076 11:12 am, 1% cancelled 61%
  3. F9 2400 8:02 pm, 3% cancelled 32%
  4. F9 4106 8:02 pm, 7% cancelled 41%

What time should I fly? The 7 am departures.

89% landed on time; at 5 pm, 65%. Wednesday was the best day, Sunday the worst.

Flight records,

DepartsLanded on time
5 am83%
6 am65%
7 am89%
8 am87%
9 am72%
10 am76%
11 am82%
12 pm74%
1 pm80%
2 pm74%
3 pm86%
4 pm70%
5 pm65%
6 pm66%
7 pm67%
8 pm70%

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.