Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Ontario → Chicago via San Francisco: arrives on time 69%
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06:00 ONT → 07:25 SFOUA 2363 · United · 1h 25m · 91% on time, 1.0% cancelled
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50m layover in San Francisco (SFO) · 45 min minimum on one ticket
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08:15 SFO → 14:50 ORDUA 1568 · United · 4h 35m · 85% on time, 0.5% cancelled
Total trip 6h 50m, scheduled departure to arrival (Chicago is 2 h ahead of Ontario). Times are local. Both flew on 56 of the last 56 days.
Makes the connection82%The first flight arrived more than 5 minutes late on 18% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time69%First flight not cancelled (1.0% are) × connection made (82%) × second flight not cancelled (0.5% are) and within 15 minutes (85%).
Total trip6h 50mONT 06:00 to ORD 14:50, 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.