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

St Louis → Dulles via Atlanta: arrives on time 72%

  1. 13:22 STL → 16:07 ATL
    DL 566 · Delta · 1h 41m · 86% on time, 2.1% cancelled
  2. 3h 08m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 19:15 ATL → 21:03 IAD
    DL 1309 · Delta · 1h 49m · 76% on time, 2.5% cancelled

Total trip 6h 42m, scheduled departure to arrival (Dulles is 1 h ahead of St Louis). Times are local. Both flew on 45 of the last 56 days.

Makes the connection98%The first flight arrived more than 143 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 3h 08m layover.
Arrives on time72%First flight not cancelled (2.1% are) × connection made (98%) × second flight not cancelled (2.5% are) and within 15 minutes (76%).
Total trip6h 42mSTL 13:22 to IAD 21:03, 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.