Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → Portland via San Francisco: arrives on time 71%
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16:15 BOS → 19:49 SFOUA 512 · United · 6h 34m · 69% on time, 2.7% cancelled
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3h 03m layover in San Francisco (SFO) · 45 min minimum on one ticket
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22:52 SFO → 00:50 PDX +1 dayUA 2384 · United · 1h 58m · 75% on time, 0.0% cancelled
Total trip 11h 35m, scheduled departure to arrival (Portland is 3 h behind Boston). Times are local. Both flew on 37 of the last 56 days.
Makes the connection97%The first flight arrived more than 138 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 3h 03m layover.
Arrives on time71%First flight not cancelled (2.7% are) × connection made (97%) × second flight not cancelled (0.0% are) and within 15 minutes (75%).
Total trip11h 35mBOS 16:15 to PDX 00:50, 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.