Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

Denver → Houston via Chicago: arrives on time 25%

  1. 15:00 DEN → 18:20 MDW
    WN 1603 · Southwest · 2h 20m · 61% on time, 3.4% cancelled
  2. 55m layover in Chicago (MDW) · 45 min minimum on one ticket
  3. 19:15 MDW → 21:50 HOU
    WN 1431 · Southwest · 2h 35m · 51% on time, 2.4% cancelled

Total trip 5h 50m, scheduled departure to arrival (Houston is 1 h ahead of Denver). Times are local. Both flew on 40 of the last 56 days.

Makes the connection52%The first flight arrived more than 10 minutes late on 48% of the days it flew: too late for the 45-minute minimum connection on a 55m layover.
Arrives on time25%First flight not cancelled (3.4% are) × connection made (52%) × second flight not cancelled (2.4% are) and within 15 minutes (51%).
Total trip5h 50mDEN 15:00 to HOU 21:50, 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.