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Flight records through . Security counts through .

Which IAD to ATL flight is punctual? United 2739, 8:15 am.

88% on time across 61 flights in the last 3 months, never cancelled.

Find your flightIAD security
DepartsFlightOn time
8:15 amUA 273988%
6:00 amDL 212785%
8:28 amDL 308080%
10:16 amDL 132479%
11:17 amF9 108179%
12:35 pmUA 47177%
10:28 pmUA 163571%
12:37 pmDL 144468%
8 of 15 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 77%.

Flight records,

  • United

    80%

    on time

    0.8% cancelled

  • Delta

    77%

    on time

    2.8% cancelled

  • Frontier

    66%

    on time

    3.2% cancelled

When do the flights leave? 15 regular flights, 6 am to 10:28 pm.

F9 4409 was cancelled most often, 18% of the time.

Flight records,

  1. UA 2739 8:15 am, 0% cancelled 88%
  2. UA 471 12:35 pm, 1% cancelled 77%
  3. UA 2081 5:17 pm, 1% cancelled 51%
  4. UA 1635 10:28 pm, 4% cancelled 71%
  1. DL 2127 6:00 am, 2% cancelled 85%
  2. DL 3080 8:28 am, 3% cancelled 80%
  3. DL 1324 10:16 am, 1% cancelled 79%
  4. DL 1444 12:37 pm, 1% cancelled 68%
  5. DL 2135 3:02 pm, 1% cancelled 63%
  6. DL 1695 5:47 pm, 1% cancelled 54%
  7. DL 2902 7:26 pm, 6% cancelled 46%
  1. F9 4707 7:49 am, 6% cancelled 59%
  2. F9 1081 11:17 am, 4% cancelled 79%
  3. F9 3691 8:33 pm, 9% cancelled 48%
  4. F9 4409 8:33 pm, 18% cancelled 33%

What time should I fly? The 8 am departures.

88% landed on time; at 8 pm, 46%. Thursday was the best day, Sunday the worst.

Flight records,

DepartsLanded on time
5 am60%
6 am81%
7 am72%
8 am88%
9 am84%
10 am81%
11 am87%
12 pm80%
1 pm69%
3 pm75%
4 pm86%
5 pm67%
6 pm65%
7 pm68%
8 pm46%
10 pm79%

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.