Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Columbus → Denver via Atlanta: arrives on time 37%
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17:52 CMH → 19:35 ATLF9 2539 · Frontier · 1h 43m · 54% on time, 2.9% cancelled
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1h 05m layover in Atlanta (ATL) · 45 min minimum on one ticket
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20:40 ATL → 22:16 DENF9 3599 · Frontier · 3h 36m · 64% on time, 2.2% cancelled
Total trip 6h 24m, scheduled departure to arrival (Denver is 2 h behind Columbus). Times are local. Both flew on 24 of the last 56 days.
Makes the connection60%The first flight arrived more than 20 minutes late on 40% of the days it flew: too late for the 45-minute minimum connection on a 1h 05m layover.
Arrives on time37%First flight not cancelled (2.9% are) × connection made (60%) × second flight not cancelled (2.2% are) and within 15 minutes (64%).
Total trip6h 24mCMH 17:52 to DEN 22:16, 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.