Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → Reno via San Francisco: arrives on time 46%
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18:20 ORD → 21:18 SFOUA 2179 · United · 4h 58m · 48% on time, 1.2% cancelled
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1h 27m layover in San Francisco (SFO) · 45 min minimum on one ticket
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22:45 SFO → 23:58 RNOUA 1757 · United · 1h 13m · 64% on time, 0.4% cancelled
Total trip 7h 38m, scheduled departure to arrival (Reno is 2 h behind Chicago). Times are local. Both flew on 45 of the last 56 days.
Makes the connection73%The first flight arrived more than 42 minutes late on 27% of the days it flew: too late for the 45-minute minimum connection on a 1h 27m layover.
Arrives on time46%First flight not cancelled (1.2% are) × connection made (73%) × second flight not cancelled (0.4% are) and within 15 minutes (64%).
Total trip7h 38mORD 18:20 to RNO 23:58, 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.