Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
St Louis → Boston via Houston: arrives on time 43%
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14:57 STL → 17:16 IAHUA 5580 · United, flown by SkyWest · 2h 19m · 64% on time, 0.0% cancelled
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59m layover in Houston (IAH) · 45 min minimum on one ticket
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18:15 IAH → 23:19 BOSUA 521 · United · 4h 04m · 68% on time, 0.0% cancelled
Total trip 7h 22m, scheduled departure to arrival (Boston is 1 h ahead of St Louis). Times are local. Both flew on 36 of the last 56 days.
Makes the connection63%The first flight arrived more than 14 minutes late on 37% of the days it flew: too late for the 45-minute minimum connection on a 59m layover.
Arrives on time43%First flight not cancelled (0.0% are) × connection made (63%) × second flight not cancelled (0.0% are) and within 15 minutes (68%).
Total trip7h 22mSTL 14:57 to BOS 23:19, 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.