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Flight records through . Security counts through .

Which SDF to IAD flight is punctual? United 3438, 6 am.

93% on time across 86 flights in the last 3 months, 1.2% cancelled.

Find your flightSDF security
DepartsFlightOn time
6:00 amUA 343893%
10:00 amUA 350891%
1:48 pmUA 406789%
10:05 amUA 371787%
4 of 4 regular flights, ranked by arrivals on time, June to August 2026.

When do the flights leave? 4 regular flights, 6 am to 1:48 pm.

UA 4067 was cancelled most often, 2% of the time.

Flight records,

  1. UA 3438 6:00 am, 1% cancelled 93%
  2. UA 3508 10:00 am, 0% cancelled 91%
  3. UA 3717 10:05 am, 0% cancelled 87%
  4. UA 4067 1:48 pm, 2% cancelled 89%

What time should I fly? The 6 am departures.

94% landed on time; at 2 pm, 83%. Thursday was the best day, Sunday the worst.

Flight records,

DepartsLanded on time
6 am94%
9 am87%
10 am90%
1 pm90%
2 pm83%

When is SDF security busiest? 5 to 6 every morning.

Calmest around 5 pm. Louisville 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

Monday, 6 am

870

people screened, all terminals.