Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Detroit → St Louis via Atlanta: arrives on time 78%
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06:10 DTW → 08:31 ATLF9 1263 · Frontier · 2h 21m · 78% on time, 1.1% cancelled
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3h 21m layover in Atlanta (ATL) · 90 min minimum on separate tickets
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11:52 ATL → 12:34 STLDL 566 · Delta · 1h 38m · 83% on time, 1.4% cancelled
Total trip 7h 20m, scheduled departure to arrival (St Louis is 1 h behind Detroit). Times are local. Both flew on 55 of the last 56 days.
Makes the connection97%The first flight arrived more than 111 minutes late on 3% of the days it flew: too late for the 90-minute minimum connection on a 3h 21m layover.
Arrives on time78%First flight not cancelled (1.1% are) × connection made (97%) × second flight not cancelled (1.4% are) and within 15 minutes (83%).
Total trip7h 20mDTW 06:10 to STL 12:34, 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.