Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Ontario via Salt Lake City: arrives on time 83%
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07:15 IAD → 09:52 SLCDL 432 · Delta · 4h 37m · 85% on time, 1.6% cancelled
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1h 27m layover in Salt Lake City (SLC) · 45 min minimum on one ticket
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11:19 SLC → 12:10 ONTDL 3172 · Delta · 1h 51m · 91% on time, 0.0% cancelled
Total trip 7h 55m, scheduled departure to arrival (Ontario is 3 h behind Dulles). Times are local. Both flew on 55 of the last 56 days.
Makes the connection93%The first flight arrived more than 42 minutes late on 7% of the days it flew: too late for the 45-minute minimum connection on a 1h 27m layover.
Arrives on time83%First flight not cancelled (1.6% are) × connection made (93%) × second flight not cancelled (0.0% are) and within 15 minutes (91%).
Total trip7h 55mIAD 07:15 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.