Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Sacramento via Denver: arrives on time 39%
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17:41 IAD → 19:45 DENUA 599 · United · 4h 04m · 74% on time, 1.2% cancelled
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55m layover in Denver (DEN) · 45 min minimum on one ticket
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20:40 DEN → 22:15 SMFUA 1268 · United · 2h 35m · 58% on time, 0.0% cancelled
Total trip 7h 34m, scheduled departure to arrival (Sacramento is 3 h behind Dulles). Times are local. Both flew on 39 of the last 56 days.
Makes the connection69%The first flight arrived more than 10 minutes late on 31% of the days it flew: too late for the 45-minute minimum connection on a 55m layover.
Arrives on time39%First flight not cancelled (1.2% are) × connection made (69%) × second flight not cancelled (0.0% are) and within 15 minutes (58%).
Total trip7h 34mIAD 17:41 to SMF 22:15, 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.