Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Washington via Houston: arrives on time 64%
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12:15 SFO → 18:27 IAHUA 1387 · United · 4h 12m · 78% on time, 0.4% cancelled
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1h 23m layover in Houston (IAH) · 45 min minimum on one ticket
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19:50 IAH → 23:59 DCAUA 2224 · United · 3h 09m · 70% on time, 0.7% cancelled
Total trip 8h 44m, scheduled departure to arrival (Washington is 3 h ahead of San Francisco). Times are local. Both flew on 48 of the last 56 days.
Makes the connection92%The first flight arrived more than 38 minutes late on 8% of the days it flew: too late for the 45-minute minimum connection on a 1h 23m layover.
Arrives on time64%First flight not cancelled (0.4% are) × connection made (92%) × second flight not cancelled (0.7% are) and within 15 minutes (70%).
Total trip8h 44mSFO 12:15 to DCA 23:59, 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.