Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Diego → Chicago via San Francisco: arrives on time 33%
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19:41 SAN → 21:28 SFOUA 2278 · United · 1h 47m · 37% on time, 0.8% cancelled
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1h 10m layover in San Francisco (SFO) · 45 min minimum on one ticket
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22:38 SFO → 05:01 ORD +1 dayUA 2278 · United · 4h 23m · 81% on time, 2.4% cancelled
Total trip 7h 20m, scheduled departure to arrival (Chicago is 2 h ahead of San Diego). Times are local. Both flew on 39 of the last 56 days.
Makes the connection42%The first flight arrived more than 25 minutes late on 58% of the days it flew: too late for the 45-minute minimum connection on a 1h 10m layover.
Arrives on time33%First flight not cancelled (0.8% are) × connection made (42%) × second flight not cancelled (2.4% are) and within 15 minutes (81%).
Total trip7h 20mSAN 19:41 to ORD 05:01, 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.