Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → Denver via Seattle: arrives on time 43%
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16:20 ORD → 19:06 SEAUA 1801 · United · 4h 46m · 73% on time, 0.6% cancelled
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48m layover in Seattle (SEA) · 45 min minimum on one ticket
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19:54 SEA → 23:38 DENUA 1218 · United · 2h 44m · 84% on time, 0.5% cancelled
Total trip 8h 18m, scheduled departure to arrival (Denver is 1 h behind Chicago). Times are local. Both flew on 40 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 time43%First flight not cancelled (0.6% are) × connection made (52%) × second flight not cancelled (0.5% are) and within 15 minutes (84%).
Total trip8h 18mORD 16:20 to DEN 23:38, 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.