Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Denver → Ontario via Salt Lake City: arrives on time 89%
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06:00 DEN → 07:31 SLCF9 3219 · Frontier · 1h 31m · 83% on time, 1.0% cancelled
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3h 48m layover in Salt Lake City (SLC) · 90 min minimum on separate tickets
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11:19 SLC → 12:10 ONTDL 3172 · Delta · 1h 51m · 91% on time, 0.0% cancelled
Total trip 7h 10m, scheduled departure to arrival (Ontario is 1 h behind Denver). Times are local. Both flew on 55 of the last 56 days.
Makes the connection99%The first flight arrived more than 138 minutes late on 1% of the days it flew: too late for the 90-minute minimum connection on a 3h 48m layover.
Arrives on time89%First flight not cancelled (1.0% are) × connection made (99%) × second flight not cancelled (0.0% are) and within 15 minutes (91%).
Total trip7h 10mDEN 06:00 to ONT 12:10, 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.