Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Louisville via Denver: arrives on time 61%
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14:35 IAD → 16:29 DENUA 1126 · United · 3h 54m · 82% on time, 0.0% cancelled
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1h 39m layover in Denver (DEN) · 45 min minimum on one ticket
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18:08 DEN → 22:59 SDFUA 514 · United · 2h 51m · 64% on time, 0.0% cancelled
Total trip 8h 24m, scheduled departure to arrival. Times are local. Both flew on 19 of the last 56 days, too few to list among the best connections.
Makes the connection95%The first flight arrived more than 54 minutes late on 5% of the days it flew: too late for the 45-minute minimum connection on a 1h 39m layover.
Arrives on time61%First flight not cancelled (0.0% are) × connection made (95%) × second flight not cancelled (0.0% are) and within 15 minutes (64%).
Total trip8h 24mIAD 14:35 to SDF 22:59, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.