Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → San Francisco via Denver: arrives on time 68%
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05:00 ORD → 06:42 DENUA 2666 · United · 2h 42m · 98% on time, 0.6% cancelled
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58m layover in Denver (DEN) · 45 min minimum on one ticket
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07:40 DEN → 09:18 SFOUA 2391 · United · 2h 38m · 71% on time, 0.6% cancelled
Total trip 6h 18m, scheduled departure to arrival (San Francisco is 2 h behind Chicago). Times are local. Both flew on 56 of the last 56 days.
Makes the connection97%The first flight arrived more than 13 minutes late on 3% of the days it flew: too late for the 45-minute minimum connection on a 58m layover.
Arrives on time68%First flight not cancelled (0.6% are) × connection made (97%) × second flight not cancelled (0.6% are) and within 15 minutes (71%).
Total trip6h 18mORD 05:00 to SFO 09:18, 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.