Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → St Louis via San Francisco: arrives on time 24%
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09:43 DEN → 11:25 SFOUA 1506 · United · 2h 42m · 48% on time, 0.6% cancelled
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47m layover in San Francisco (SFO) · 45 min minimum on one ticket
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12:12 SFO → 18:17 STLUA 2090 · United · 4h 05m · 75% on time, 0.0% cancelled
Total trip 7h 34m, scheduled departure to arrival (St Louis is 1 h ahead of Denver). Times are local. Both flew on 56 of the last 56 days.
Makes the connection32%The first flight arrived more than 2 minutes late on 68% of the days it flew: too late for the 45-minute minimum connection on a 47m layover.
Arrives on time24%First flight not cancelled (0.6% are) × connection made (32%) × second flight not cancelled (0.0% are) and within 15 minutes (75%).
Total trip7h 34mDEN 09:43 to STL 18:17, 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.