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

St Louis → Boston via Chicago: arrives on time 40%

  1. 13:27 STL → 14:59 ORD
    AA 6352 · American, flown by SkyWest · 1h 34m · 65% on time, 5.6% cancelled
  2. 1h 14m layover in Chicago (ORD) · 45 min minimum on one ticket
  3. 16:13 ORD → 19:57 BOS
    AA 4384 · American, flown by Republic · 2h 51m · 62% on time, 6.8% cancelled

Total trip 5h 37m, scheduled departure to arrival (Boston is 1 h ahead of St Louis). Times are local. Both flew on 56 of the last 56 days.

Makes the connection73%The first flight arrived more than 29 minutes late on 27% of the days it flew: too late for the 45-minute minimum connection on a 1h 14m layover.
Arrives on time40%First flight not cancelled (5.6% are) × connection made (73%) × second flight not cancelled (6.8% are) and within 15 minutes (62%).
Total trip5h 37mSTL 13:27 to BOS 19:57, layover included

Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.