Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Ontario via Dallas-Fort Worth: arrives on time 20%
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19:31 IAD → 21:50 DFWAA 1904 · American · 3h 19m · 51% on time, 2.9% cancelled
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1h 05m layover in Dallas-Fort Worth (DFW) · 45 min minimum on one ticket
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22:55 DFW → 23:59 ONT +1 dayAA 1534 · American · 3h 07m · 39% on time, 2.7% cancelled
Total trip 7h 31m, scheduled departure to arrival (Ontario is 3 h behind Dulles). Times are local. Both flew on 53 of the last 56 days.
Makes the connection54%The first flight arrived more than 20 minutes late on 46% of the days it flew: too late for the 45-minute minimum connection on a 1h 05m layover.
Arrives on time20%First flight not cancelled (2.9% are) × connection made (54%) × second flight not cancelled (2.7% are) and within 15 minutes (39%).
Total trip7h 31mIAD 19:31 to ONT 23:59, 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.