Airports AirportPace Search

Flight records through . Security counts through .

Which IAD to MDT flight is punctual? United 4986, 8:35 am.

90% on time across 57 flights in the last 3 months, 1.8% cancelled.

Find your flightIAD security
DepartsFlightOn time
8:35 amUA 498690%
12:45 pmUA 437287%
5:35 pmUA 425067%
10:30 pmUA 452667%
10:26 pmUA 496464%
5 of 5 regular flights, ranked by arrivals on time, June to August 2026.

When do the flights leave? 5 regular flights, 8:35 am to 10:30 pm.

UA 4250 was cancelled most often, 7% of the time.

Flight records,

  1. UA 4986 8:35 am, 2% cancelled 90%
  2. UA 4372 12:45 pm, 0% cancelled 87%
  3. UA 4250 5:35 pm, 7% cancelled 67%
  4. UA 4964 10:26 pm, 6% cancelled 64%
  5. UA 4526 10:30 pm, 0% cancelled 67%

What time should I fly? The 8 am departures.

86% landed on time; at 5 pm, 73%. Tuesday was the best day, Monday the worst.

Flight records,

DepartsLanded on time
8 am86%
12 pm82%
5 pm73%
10 pm74%

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.