Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → Portland via Chicago: arrives on time 34%
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18:31 BOS → 21:00 ORDAA 1554 · American · 3h 29m · 61% on time, 6.9% cancelled
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1h 15m layover in Chicago (ORD) · 45 min minimum on one ticket
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22:15 ORD → 00:50 PDX +1 dayAA 1317 · American · 4h 35m · 54% on time, 1.4% cancelled
Total trip 9h 19m, scheduled departure to arrival (Portland is 3 h behind Boston). Times are local. Both flew on 56 of the last 56 days.
Makes the connection69%The first flight arrived more than 30 minutes late on 31% of the days it flew: too late for the 45-minute minimum connection on a 1h 15m layover.
Arrives on time34%First flight not cancelled (6.9% are) × connection made (69%) × second flight not cancelled (1.4% are) and within 15 minutes (54%).
Total trip9h 19mBOS 18:31 to PDX 00:50, 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.