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

Chicago → Boston via St Louis: arrives on time 84%

  1. 07:05 ORD → 08:31 STL
    AA 4104 · American, flown by Envoy · 1h 27m · 96% on time, 0.0% cancelled
  2. 1h 08m layover in St Louis (STL) · 45 min minimum on one ticket
  3. 09:39 STL → 13:24 BOS
    AA 3814 · American, flown by Envoy · 2h 45m · 90% on time, 3.8% cancelled

Total trip 5h 19m, scheduled departure to arrival (Boston is 1 h ahead of Chicago). Times are local. Both flew on 40 of the last 56 days.

Makes the connection97%The first flight arrived more than 23 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 1h 08m layover.
Arrives on time84%First flight not cancelled (0.0% are) × connection made (97%) × second flight not cancelled (3.8% are) and within 15 minutes (90%).
Total trip5h 19mORD 07:05 to BOS 13:24, 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.