Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Denver via Chicago: arrives on time 43%
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17:42 IAD → 18:50 ORDUA 2497 · United · 2h 08m · 48% on time, 1.1% cancelled
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1h 10m layover in Chicago (ORD) · 45 min minimum on one ticket
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20:00 ORD → 22:01 DENUA 767 · United · 3h 01m · 71% on time, 2.2% cancelled
Total trip 6h 19m, scheduled departure to arrival (Denver is 2 h behind Dulles). Times are local. Both flew on 56 of the last 56 days.
Makes the connection62%The first flight arrived more than 25 minutes late on 38% of the days it flew: too late for the 45-minute minimum connection on a 1h 10m layover.
Arrives on time43%First flight not cancelled (1.1% are) × connection made (62%) × second flight not cancelled (2.2% are) and within 15 minutes (71%).
Total trip6h 19mIAD 17:42 to DEN 22:01, 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.