Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → Tucson via San Francisco: arrives on time 33%
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09:43 DEN → 11:25 SFOUA 1506 · United · 2h 42m · 48% on time, 0.6% cancelled
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58m layover in San Francisco (SFO) · 45 min minimum on one ticket
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12:23 SFO → 14:47 TUSUA 6023 · United, flown by SkyWest · 2h 24m · 74% on time, 0.0% cancelled
Total trip 6h 04m, scheduled departure to arrival (Tucson is 1 h behind Denver). Times are local. Both flew on 56 of the last 56 days.
Makes the connection46%The first flight arrived more than 13 minutes late on 54% of the days it flew: too late for the 45-minute minimum connection on a 58m layover.
Arrives on time33%First flight not cancelled (0.6% are) × connection made (46%) × second flight not cancelled (0.0% are) and within 15 minutes (74%).
Total trip6h 04mDEN 09:43 to TUS 14:47, 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.