Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → Denver via San Diego: arrives on time 16%
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10:08 MDW → 12:15 SANWN 4648 · Southwest · 4h 08m · 58% on time, 0.0% cancelled
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1h 05m layover in San Diego (SAN) · 45 min minimum on one ticket
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13:20 SAN → 16:55 DENWN 3496 · Southwest · 2h 30m · 25% on time, 0.0% cancelled
Total trip 7h 42m, scheduled departure to arrival (Denver is 1 h behind Chicago). Times are local. Both flew on 48 of the last 56 days.
Makes the connection66%The first flight arrived more than 20 minutes late on 34% of the days it flew: too late for the 45-minute minimum connection on a 1h 05m layover.
Arrives on time16%First flight not cancelled (0.0% are) × connection made (66%) × second flight not cancelled (0.0% are) and within 15 minutes (25%).
Total trip7h 42mMDW 10:08 to DEN 16:55, 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.