Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → San Juan via Houston: arrives on time 57%
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19:35 DEN → 23:06 IAHUA 475 · United · 2h 31m · 75% on time, 0.0% cancelled
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50m layover in Houston (IAH) · 45 min minimum on one ticket
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23:56 IAH → 05:29 SJU +1 dayUA 1497 · United · 4h 33m · 86% on time, 0.7% cancelled
Total trip 7h 54m, scheduled departure to arrival (San Juan is 2 h ahead of Denver). Times are local. Both flew on 56 of the last 56 days.
Makes the connection67%The first flight arrived more than 5 minutes late on 33% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time57%First flight not cancelled (0.0% are) × connection made (67%) × second flight not cancelled (0.7% are) and within 15 minutes (86%).
Total trip7h 54mDEN 19:35 to SJU 05:29, 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.