Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → Dallas via Atlanta: arrives on time 83%
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08:15 IAD → 10:14 ATLUA 2739 · United · 1h 59m · 89% on time, 0.4% cancelled
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3h 45m layover in Atlanta (ATL) · 90 min minimum on separate tickets
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13:59 ATL → 15:03 DALDL 512 · Delta · 2h 13m · 86% on time, 1.4% cancelled
Total trip 7h 57m, scheduled departure to arrival (Dallas is 1 h behind Dulles). Times are local. Both flew on 31 of the last 56 days.
Makes the connection98%The first flight arrived more than 135 minutes late on 2% of the days it flew: too late for the 90-minute minimum connection on a 3h 45m layover.
Arrives on time83%First flight not cancelled (0.4% are) × connection made (98%) × second flight not cancelled (1.4% are) and within 15 minutes (86%).
Total trip7h 57mIAD 08:15 to DAL 15:03, 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.