Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Diego → Chicago via Atlanta: arrives on time 74%
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06:15 SAN → 13:43 ATLDL 729 · Delta · 4h 28m · 92% on time, 1.1% cancelled
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1h 32m layover in Atlanta (ATL) · 45 min minimum on one ticket
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15:15 ATL → 16:15 MDWDL 1728 · Delta · 2h 00m · 77% on time, 2.1% cancelled
Total trip 8h 00m, scheduled departure to arrival (Chicago is 2 h ahead of San Diego). Times are local. Both flew on 43 of the last 56 days.
Makes the connection99%The first flight arrived more than 47 minutes late on 1% of the days it flew: too late for the 45-minute minimum connection on a 1h 32m layover.
Arrives on time74%First flight not cancelled (1.1% are) × connection made (99%) × second flight not cancelled (2.1% are) and within 15 minutes (77%).
Total trip8h 00mSAN 06:15 to MDW 16:15, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.