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Flight records through . Security counts through .

Which SEA to IAD flight is punctual? United 688, 8 am.

92% on time across 24 flights in the last 3 months, never cancelled.

Find your flightSEA security
DepartsFlightOn time
8:00 amUA 68892%
8:10 amUA 152390%
8:15 amUA 246389%
1:00 pmUA 213189%
11:20 pmUA 26485%
9:13 amAS 73780%
4:01 pmAS 40677%
10:43 pmAS 36775%
8 of 9 regular flights, ranked by arrivals on time, June to August 2026.

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

United landed on time 90% of the time, Alaska 83%.

Flight records,

  • United

    90%

    on time

    0.6% cancelled

  • Alaska

    83%

    on time

    0.4% cancelled

  • Delta

    76%

    on time

    1.1% cancelled

When do the flights leave? 9 regular flights, 8 am to 11:20 pm.

UA 264 was cancelled most often, 6% of the time.

Flight records,

  1. UA 688 8:00 am, 0% cancelled 92%
  2. UA 1523 8:10 am, 0% cancelled 90%
  3. UA 2463 8:15 am, 0% cancelled 89%
  4. UA 2131 1:00 pm, 0% cancelled 89%
  5. UA 264 11:20 pm, 6% cancelled 85%
  1. AS 737 9:13 am, 0% cancelled 80%
  2. AS 406 4:01 pm, 0% cancelled 77%
  3. AS 367 10:43 pm, 0% cancelled 75%
  1. DL 541 4:05 pm, 0% cancelled 73%

What time should I fly? The 1 pm departures.

90% landed on time; at 4 pm, 78%. Wednesday was the best day, Friday the worst.

Flight records,

DepartsLanded on time
8 am90%
9 am82%
10 am85%
1 pm90%
3 pm79%
4 pm78%
9 pm82%
10 pm81%
11 pm85%

When is SEA security busiest? 6 to 10 every morning.

Calmest around 5 pm. Seattle 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

Friday, 7 am

4,660

people screened, all terminals.