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Flight records through . Security counts through .

Which IAD to SEA flight is punctual? United 2101, 9 am.

92% on time across 63 flights in the last 3 months, never cancelled.

Find your flightIAD security
DepartsFlightOn time
9:00 amUA 210192%
1:20 pmUA 279990%
9:30 amAS 36190%
6:03 amAS 40989%
9:03 amAS 37586%
1:10 pmUA 224184%
7:00 amDL 101583%
6:14 pmAS 73760%
8 of 9 regular flights, ranked by arrivals on time, June to August 2026.

Which airline is most reliable? United, ahead of Delta.

United landed on time 81% of the time, Delta 75%.

Flight records,

  • United

    81%

    on time

    0.5% cancelled

  • Delta

    75%

    on time

    1.4% cancelled

  • Alaska

    74%

    on time

    1.2% cancelled

When do the flights leave? 9 regular flights, 6:03 am to 6:14 pm.

UA 326 was cancelled most often, 3% of the time.

Flight records,

  1. UA 2101 9:00 am, 0% cancelled 92%
  2. UA 2241 1:10 pm, 0% cancelled 84%
  3. UA 2799 1:20 pm, 0% cancelled 90%
  4. UA 326 5:55 pm, 3% cancelled 59%
  1. DL 1015 7:00 am, 0% cancelled 83%
  1. AS 409 6:03 am, 0% cancelled 89%
  2. AS 375 9:03 am, 0% cancelled 86%
  3. AS 361 9:30 am, 1% cancelled 90%
  4. AS 737 6:14 pm, 2% cancelled 60%

What time should I fly? The 9 am departures.

91% landed on time; at 7 pm, 53%. Saturday was the best day, Tuesday the worst.

Flight records,

DepartsLanded on time
6 am90%
7 am74%
8 am85%
9 am91%
1 pm89%
5 pm73%
6 pm62%
7 pm53%

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.