Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Washington → Ontario via Denver: arrives on time 84%
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07:00 DCA → 09:07 DENF9 685 · Frontier · 4h 07m · 86% on time, 0.8% cancelled
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2h 18m layover in Denver (DEN) · 90 min minimum on separate tickets
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11:25 DEN → 12:47 ONTUA 430 · United · 2h 22m · 88% on time, 0.0% cancelled
Total trip 8h 47m, scheduled departure to arrival (Ontario is 3 h behind Washington). Times are local. Both flew on 55 of the last 56 days.
Makes the connection96%The first flight arrived more than 48 minutes late on 4% of the days it flew: too late for the 90-minute minimum connection on a 2h 18m layover.
Arrives on time84%First flight not cancelled (0.8% are) × connection made (96%) × second flight not cancelled (0.0% are) and within 15 minutes (88%).
Total trip8h 47mDCA 07:00 to ONT 12:47, 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.