Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Dulles → San Francisco via Boston: arrives on time 69%
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10:00 IAD → 11:52 BOSUA 3552 · United, flown by Republic · 1h 52m · 85% on time, 3.7% cancelled
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3h 58m layover in Boston (BOS) · 90 min minimum on separate tickets
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15:50 BOS → 19:22 SFOB6 233 · JetBlue · 6h 34m · 74% on time, 2.3% cancelled
Total trip 12h 24m, scheduled departure to arrival (San Francisco is 3 h behind Dulles). Times are local. Both flew on 27 of the last 56 days.
Makes the connection100%The first flight arrived more than 148 minutes late on 0% of the days it flew: too late for the 90-minute minimum connection on a 3h 58m layover.
Arrives on time69%First flight not cancelled (3.7% are) × connection made (100%) × second flight not cancelled (2.3% are) and within 15 minutes (74%).
Total trip12h 24mIAD 10:00 to SFO 19:22, 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.