Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Miami → Dulles via Atlanta: arrives on time 37%
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17:28 MIA → 20:00 ATLF9 4405 · Frontier · 2h 30m · 57% on time, 1.8% cancelled
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1h 16m layover in Atlanta (ATL) · 45 min minimum on one ticket
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21:16 ATL → 23:09 IADF9 3692 · Frontier · 1h 53m · 56% on time, 1.7% cancelled
Total trip 5h 41m, scheduled departure to arrival. Times are local. Both flew on 56 of the last 56 days.
Makes the connection69%The first flight arrived more than 31 minutes late on 31% of the days it flew: too late for the 45-minute minimum connection on a 1h 16m layover.
Arrives on time37%First flight not cancelled (1.8% are) × connection made (69%) × second flight not cancelled (1.7% are) and within 15 minutes (56%).
Total trip5h 41mMIA 17:28 to IAD 23:09, 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.