Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Diego → Boston via Chicago: arrives on time 36%
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06:40 SAN → 13:09 ORDUA 1069 · United · 4h 29m · 88% on time, 1.4% cancelled
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46m layover in Chicago (ORD) · 45 min minimum on one ticket
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13:55 ORD → 17:31 BOSUA 1693 · United · 2h 36m · 64% on time, 2.6% cancelled
Total trip 7h 51m, scheduled departure to arrival (Boston is 3 h ahead of San Diego). Times are local. Both flew on 56 of the last 56 days.
Makes the connection59%The first flight arrived more than 1 minutes late on 41% of the days it flew: too late for the 45-minute minimum connection on a 46m layover.
Arrives on time36%First flight not cancelled (1.4% are) × connection made (59%) × second flight not cancelled (2.6% are) and within 15 minutes (64%).
Total trip7h 51mSAN 06:40 to BOS 17:31, 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.