Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Sacramento → Ontario via San Francisco: arrives on time 25%
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19:03 SMF → 20:10 SFOUA 5961 · United, flown by SkyWest · 1h 07m · 43% on time, 3.0% cancelled
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50m layover in San Francisco (SFO) · 45 min minimum on one ticket
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21:00 SFO → 22:37 ONTUA 552 · United · 1h 37m · 83% on time, 0.5% cancelled
Total trip 3h 34m, scheduled departure to arrival. Times are local. Both flew on 55 of the last 56 days.
Makes the connection31%The first flight arrived more than 5 minutes late on 69% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time25%First flight not cancelled (3.0% are) × connection made (31%) × second flight not cancelled (0.5% are) and within 15 minutes (83%).
Total trip3h 34mSMF 19:03 to ONT 22:37, 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.