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

Dulles → St Louis via Atlanta: arrives on time 73%

  1. 10:21 IAD → 12:05 ATL
    DL 1324 · Delta · 1h 48m · 85% on time, 4.3% cancelled
  2. 4h 00m layover in Atlanta (ATL) · 45 min minimum on one ticket
  3. 16:05 ATL → 16:48 STL
    DL 543 · Delta · 1h 43m · 81% on time, 2.7% cancelled

Total trip 7h 27m, scheduled departure to arrival (St Louis is 1 h behind Dulles). Times are local. Both flew on 1 of the last 56 days, too few to list among the best connections.

Makes the connection98%The first flight arrived more than 195 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 4h 00m layover.
Arrives on time73%First flight not cancelled (4.3% are) × connection made (98%) × second flight not cancelled (2.7% are) and within 15 minutes (81%).
Total trip7h 27mIAD 10:21 to STL 16:48, 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.