Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

St Louis → San Diego via Atlanta: arrives on time 83%

  1. 06:00 STL → 08:38 ATL
    DL 1524 · Delta · 1h 38m · 96% on time, 1.6% cancelled
  2. 3h 15m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 11:53 ATL → 13:21 SAN
    DL 540 · Delta · 4h 28m · 85% on time, 0.0% cancelled

Total trip 9h 21m, scheduled departure to arrival (San Diego is 2 h behind St Louis). Times are local. Both flew on 55 of the last 56 days.

Makes the connection99%The first flight arrived more than 150 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 3h 15m layover.
Arrives on time83%First flight not cancelled (1.6% are) × connection made (99%) × second flight not cancelled (0.0% are) and within 15 minutes (85%).
Total trip9h 21mSTL 06:00 to SAN 13:21, 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.