Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Miami → Ontario via Seattle: arrives on time 83%
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06:30 MIA → 10:00 SEADL 2355 · Delta · 6h 30m · 93% on time, 0.0% cancelled
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1h 53m layover in Seattle (SEA) · 90 min minimum on separate tickets
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11:53 SEA → 14:39 ONTF9 2276 · Frontier · 2h 46m · 88% on time, 4.0% cancelled
Total trip 11h 09m, scheduled departure to arrival (Ontario is 3 h behind Miami). Times are local. Both flew on 30 of the last 56 days.
Makes the connection99%The first flight arrived more than 23 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 1h 53m layover.
Arrives on time83%First flight not cancelled (0.0% are) × connection made (99%) × second flight not cancelled (4.0% are) and within 15 minutes (88%).
Total trip11h 09mMIA 06:30 to ONT 14:39, 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.