Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → Las Vegas via San Francisco: arrives on time 42%
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15:57 ORD → 18:49 SFOUA 2251 · United · 4h 52m · 69% on time, 0.0% cancelled
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48m layover in San Francisco (SFO) · 45 min minimum on one ticket
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19:37 SFO → 21:27 LASUA 1995 · United · 1h 50m · 81% on time, 0.0% cancelled
Total trip 7h 30m, scheduled departure to arrival (Las Vegas is 2 h behind Chicago). Times are local. Both flew on 55 of the last 56 days.
Makes the connection52%The first flight arrived more than 3 minutes late on 48% of the days it flew: too late for the 45-minute minimum connection on a 48m layover.
Arrives on time42%First flight not cancelled (0.0% are) × connection made (52%) × second flight not cancelled (0.0% are) and within 15 minutes (81%).
Total trip7h 30mORD 15:57 to LAS 21:27, 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.