Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → Birmingham via Dallas: arrives on time 28%
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15:55 DEN → 19:00 DALWN 1388 · Southwest · 2h 05m · 38% on time, 0.0% cancelled
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1h 15m layover in Dallas (DAL) · 45 min minimum on one ticket
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20:15 DAL → 21:55 BHMWN 4390 · Southwest · 1h 40m · 49% on time, 0.0% cancelled
Total trip 5h 00m, scheduled departure to arrival (Birmingham is 1 h ahead of Denver). Times are local. Both flew on 31 of the last 56 days.
Makes the connection58%The first flight arrived more than 30 minutes late on 42% of the days it flew: too late for the 45-minute minimum connection on a 1h 15m layover.
Arrives on time28%First flight not cancelled (0.0% are) × connection made (58%) × second flight not cancelled (0.0% are) and within 15 minutes (49%).
Total trip5h 00mDEN 15:55 to BHM 21:55, 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.