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

St Louis → Seattle via Atlanta: arrives on time 66%

  1. 17:36 STL → 20:23 ATL
    DL 543 · Delta · 1h 47m · 81% on time, 3.6% cancelled
  2. 1h 12m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 21:35 ATL → 23:59 SEA
    DL 903 · Delta · 5h 24m · 79% on time, 0.7% cancelled

Total trip 8h 23m, scheduled departure to arrival (Seattle is 2 h behind St Louis). Times are local. Both flew on 1 of the last 56 days, too few to list among the best connections.

Makes the connection87%The first flight arrived more than 27 minutes late on 13% of the days it flew: too late for the 45-minute minimum connection on a 1h 12m layover.
Arrives on time66%First flight not cancelled (3.6% are) × connection made (87%) × second flight not cancelled (0.7% are) and within 15 minutes (79%).
Total trip8h 23mSTL 17:36 to SEA 23:59, 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.