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Flight records through . Security counts through .

Which IAD to SJU flight is punctual? United 2021, 8:34 am.

75% on time across 92 flights in the last 3 months, never cancelled.

Find your flightIAD security

  • UA 2021

    75%

    on time

    8:34 am

    0% cancelled

  • UA 2025

    65%

    on time

    5:24 pm

    0% cancelled

2 regular flights, June to August 2026.

When do the flights leave? 2 regular flights, 8:34 am to 5:24 pm.

None was cancelled in the last 3 months.

Flight records,

  1. UA 2021 8:34 am, 0% cancelled 75%
  2. UA 2025 5:24 pm, 0% cancelled 65%

What time should I fly? The 8 am departures.

85% landed on time; at 8 pm, 42%. Wednesday was the best day, Sunday the worst.

Flight records,

DepartsLanded on time
8 am85%
5 pm70%
8 pm42%

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.