Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Jacksonville → Chicago via Atlanta: arrives on time 41%
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18:36 JAX → 20:00 ATLF9 1549 · Frontier · 1h 23m · 64% on time, 4.0% cancelled
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1h 00m layover in Atlanta (ATL) · 45 min minimum on one ticket
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21:00 ATL → 22:03 MDWF9 2291 · Frontier · 2h 04m · 68% on time, 2.4% cancelled
Total trip 4h 28m, scheduled departure to arrival (Chicago is 1 h behind Jacksonville). Times are local. Both flew on 0 of the last 56 days, too few to list among the best connections.
Makes the connection64%The first flight arrived more than 15 minutes late on 36% of the days it flew: too late for the 45-minute minimum connection on a 1h 00m layover.
Arrives on time41%First flight not cancelled (4.0% are) × connection made (64%) × second flight not cancelled (2.4% are) and within 15 minutes (68%).
Total trip4h 28mJAX 18:36 to MDW 22:03, 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.