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Flight records through . Security counts through .

Which IAD to CMH flight is punctual? United 204, 12:55 pm.

100% on time across 21 flights in the last 3 months, never cancelled.

Find your flightIAD security
DepartsFlightOn time
12:55 pmUA 204100%
8:21 amUA 398690%
12:45 pmUA 357186%
8:25 amUA 407682%
12:45 pmUA 442074%
5:25 pmUA 458874%
5:25 pmUA 451471%
10:15 pmUA 364671%
8 of 11 regular flights, ranked by arrivals on time, June to August 2026.

When do the flights leave? 11 regular flights, 8:21 am to 10:15 pm.

UA 4588 was cancelled most often, 5% of the time.

Flight records,

  1. UA 3986 8:21 am, 0% cancelled 90%
  2. UA 4076 8:25 am, 0% cancelled 82%
  3. UA 3571 12:45 pm, 0% cancelled 86%
  4. UA 4420 12:45 pm, 2% cancelled 74%
  5. UA 204 12:55 pm, 0% cancelled 100%
  6. UA 4514 5:25 pm, 0% cancelled 71%
  7. UA 4588 5:25 pm, 5% cancelled 74%
  8. UA 1159 5:31 pm, 0% cancelled 38%
  9. UA 3507 10:15 pm, 0% cancelled 71%
  10. UA 3646 10:15 pm, 0% cancelled 71%
  11. UA 4414 10:15 pm, 5% cancelled 64%

What time should I fly? The 8 am departures.

86% landed on time; at 5 pm, 76%. Tuesday was the best day, Sunday the worst.

Flight records,

DepartsLanded on time
8 am86%
12 pm84%
5 pm76%
10 pm77%

When is IAD security busiest? 3 to 4 pm daily.

Calmest around 9 am. Washington IAD 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

Thursday, 4 pm

4,000

people screened, all terminals.