Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Boston → Portland via San Francisco: arrives on time 88%
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07:28 BOS → 10:55 SFOUA 323 · United · 6h 27m · 86% on time, 0.0% cancelled
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4h 00m layover in San Francisco (SFO) · 45 min minimum on one ticket
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14:55 SFO → 16:47 PDXUA 2851 · United · 1h 52m · 88% on time, 0.0% cancelled
Total trip 12h 19m, scheduled departure to arrival (Portland is 3 h behind Boston). Times are local. Both flew on 24 of the last 56 days.
Makes the connection100%The first flight arrived more than 195 minutes late on 0% of the days it flew: too late for the 45-minute minimum connection on a 4h 00m layover.
Arrives on time88%First flight not cancelled (0.0% are) × connection made (100%) × second flight not cancelled (0.0% are) and within 15 minutes (88%).
Total trip12h 19mBOS 07:28 to PDX 16:47, 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.