Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → Tucson via Houston: arrives on time 54%
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15:35 DEN → 19:10 IAHUA 489 · United · 2h 35m · 78% on time, 0.0% cancelled
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50m layover in Houston (IAH) · 45 min minimum on one ticket
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20:00 IAH → 20:42 TUSUA 4040 · United, flown by Mesa · 2h 42m · 83% on time, 0.0% cancelled
Total trip 6h 07m, scheduled departure to arrival (Tucson is 1 h behind Denver). Times are local. Both flew on 36 of the last 56 days.
Makes the connection65%The first flight arrived more than 5 minutes late on 35% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time54%First flight not cancelled (0.0% are) × connection made (65%) × second flight not cancelled (0.0% are) and within 15 minutes (83%).
Total trip6h 07mDEN 15:35 to TUS 20:42, 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.