Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Detroit → San Francisco via Houston: arrives on time 77%

  1. 16:15 DTW → 18:20 IAH
    DL 1529 · Delta · 3h 01m · 70% on time, 0.5% cancelled
  2. 3h 39m layover in Houston (IAH) · 90 min minimum on separate tickets
  3. 21:59 IAH → 00:05 SFO +1 day
    UA 1609 · United · 4h 06m · 80% on time, 1.2% cancelled

Total trip 10h 50m, scheduled departure to arrival (San Francisco is 3 h behind Detroit). Times are local. Both flew on 55 of the last 56 days.

Makes the connection97%The first flight arrived more than 129 minutes late on 3% of the days it flew: too late for the 90-minute minimum connection on a 3h 39m layover.
Arrives on time77%First flight not cancelled (0.5% are) × connection made (97%) × second flight not cancelled (1.2% are) and within 15 minutes (80%).
Total trip10h 50mDTW 16:15 to SFO 00:05, layover included

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.