Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → Houston via Dallas: arrives on time 21%
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17:50 DEN → 21:00 DALWN 1521 · Southwest · 2h 10m · 39% on time, 0.0% cancelled
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1h 00m layover in Dallas (DAL) · 45 min minimum on one ticket
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22:00 DAL → 23:12 HOUWN 63 · Southwest · 1h 12m · 55% on time, 2.0% cancelled
Total trip 4h 22m, scheduled departure to arrival (Houston is 1 h ahead of Denver). Times are local. Both flew on 24 of the last 56 days.
Makes the connection39%The first flight arrived more than 15 minutes late on 61% of the days it flew: too late for the 45-minute minimum connection on a 1h 00m layover.
Arrives on time21%First flight not cancelled (0.0% are) × connection made (39%) × second flight not cancelled (2.0% are) and within 15 minutes (55%).
Total trip4h 22mDEN 17:50 to HOU 23:12, 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.