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Flight records through . Security counts through .

Which SFO to ONT flight is punctual? United 2478, 6:30 pm.

86% on time across 21 flights in the last 3 months, never cancelled.

Find your flightSFO security
DepartsFlightOn time
6:30 pmUA 247886%
10:40 amUA 266180%
4:17 pmUA 561371%
9:00 pmUA 55270%
9:33 amF9 267863%
5 of 5 regular flights, ranked by arrivals on time, June to August 2026.

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

United landed on time 79% of the time, Frontier 58%.

Flight records,

  • United

    79%

    on time

    0.5% cancelled

  • Frontier

    58%

    on time

    2.4% cancelled

When do the flights leave? 5 regular flights, 9:33 am to 9 pm.

F9 2678 was cancelled most often, 1% of the time.

Flight records,

  1. UA 2661 10:40 am, 0% cancelled 80%
  2. UA 5613 4:17 pm, 0% cancelled 71%
  3. UA 2478 6:30 pm, 0% cancelled 86%
  4. UA 552 9:00 pm, 0% cancelled 70%
  1. F9 2678 9:33 am, 1% cancelled 63%

What time should I fly? The 8 am departures.

86% landed on time; at 10 pm, 40%. Tuesday was the best day, Friday the worst.

Flight records,

DepartsLanded on time
8 am86%
9 am78%
10 am81%
11 am64%
4 pm81%
6 pm83%
9 pm73%
10 pm40%

When is SFO security busiest? 7 am, then 9 am to noon.

Calmest around 4 pm. San Francisco 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, 10 am

5,960

people screened, all terminals.