Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Washington → St Louis via Houston: arrives on time 52%
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16:59 DCA → 19:27 IAHUA 1785 · United · 3h 28m · 66% on time, 0.7% cancelled
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1h 03m layover in Houston (IAH) · 45 min minimum on one ticket
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20:30 IAH → 22:45 STLUA 6187 · United, flown by Mesa · 2h 15m · 77% on time, 1.4% cancelled
Total trip 6h 46m, scheduled departure to arrival (St Louis is 1 h behind Washington). Times are local. Both flew on 47 of the last 56 days.
Makes the connection69%The first flight arrived more than 18 minutes late on 31% of the days it flew: too late for the 45-minute minimum connection on a 1h 03m layover.
Arrives on time52%First flight not cancelled (0.7% are) × connection made (69%) × second flight not cancelled (1.4% are) and within 15 minutes (77%).
Total trip6h 46mDCA 16:59 to STL 22:45, 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.