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Flight records through . Security counts through .

Which SEA to ONT flight is punctual? Delta 4070, 8:25 am.

90% on time across 76 flights in the last 3 months, never cancelled.

Find your flightSEA security
DepartsFlightOn time
8:25 amDL 407090%
8:33 amAS 136489%
7:50 pmDL 388488%
11:54 amF9 227683%
2:30 pmDL 403175%
10:25 amAS 56572%
8:33 pmAS 48964%
5:51 pmAS 59258%
8 of 9 regular flights, ranked by arrivals on time, June to August 2026.

Which airline is most reliable? Delta, by a distance.

Delta landed on time 88% of the time, Alaska 76%.

Flight records,

  • Delta

    88%

    on time

    0.4% cancelled

  • Alaska

    76%

    on time

    1.5% cancelled

When do the flights leave? 9 regular flights, 8:25 am to 8:33 pm.

AS 1364 was cancelled most often, 3% of the time.

Flight records,

  1. DL 4070 8:25 am, 0% cancelled 90%
  2. DL 4031 2:30 pm, 0% cancelled 75%
  3. DL 3884 7:50 pm, 0% cancelled 88%
  1. AS 1364 8:33 am, 3% cancelled 89%
  2. AS 565 10:25 am, 3% cancelled 72%
  3. AS 571 1:50 pm, 1% cancelled 49%
  4. AS 592 5:51 pm, 0% cancelled 58%
  5. AS 489 8:33 pm, 0% cancelled 64%

What time should I fly? The 6 pm departures.

93% landed on time; at 5 pm, 48%. Saturday was the best day, Friday the worst.

Flight records,

DepartsLanded on time
7 am90%
8 am89%
9 am86%
10 am79%
11 am82%
12 pm84%
1 pm52%
2 pm85%
3 pm78%
4 pm77%
5 pm48%
6 pm93%
7 pm85%
8 pm79%
9 pm70%

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.