Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → San Francisco via Atlanta: arrives on time 70%
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08:15 IAD → 10:14 ATLUA 2739 · United · 1h 59m · 89% on time, 0.4% cancelled
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2h 42m layover in Atlanta (ATL) · 90 min minimum on separate tickets
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12:56 ATL → 14:50 SFODL 750 · Delta · 4h 58m · 73% on time, 0.5% cancelled
Total trip 9h 39m, scheduled departure to arrival (San Francisco is 3 h behind Dulles). Times are local. Both flew on 31 of the last 56 days.
Makes the connection97%The first flight arrived more than 72 minutes late on 3% of the days it flew: too late for the 90-minute minimum connection on a 2h 42m layover.
Arrives on time70%First flight not cancelled (0.4% are) × connection made (97%) × second flight not cancelled (0.5% are) and within 15 minutes (73%).
Total trip9h 39mIAD 08:15 to SFO 14:50, 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.