Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → Tucson via San Diego: arrives on time 39%
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16:55 DEN → 18:20 SANWN 4160 · Southwest · 2h 25m · 41% on time, 0.0% cancelled
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1h 20m layover in San Diego (SAN) · 45 min minimum on one ticket
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19:40 SAN → 21:05 TUSWN 4876 · Southwest · 1h 30m · 61% on time, 0.0% cancelled
Total trip 5h 15m, scheduled departure to arrival (Tucson is 1 h behind Denver). Times are local. Both flew on 39 of the last 56 days.
Makes the connection63%The first flight arrived more than 35 minutes late on 37% of the days it flew: too late for the 45-minute minimum connection on a 1h 20m layover.
Arrives on time39%First flight not cancelled (0.0% are) × connection made (63%) × second flight not cancelled (0.0% are) and within 15 minutes (61%).
Total trip5h 15mDEN 16:55 to TUS 21:05, 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.