Connection · two tickets · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Houston → Seattle via Ontario: arrives on time 88%
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07:45 HOU → 08:55 ONTWN 4391 · Southwest · 3h 10m · 77% on time, 0.0% cancelled
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3h 04m layover in Ontario (ONT) · 90 min minimum on separate tickets
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11:59 ONT → 14:53 SEADL 4070 · Delta, flown by SkyWest · 3h 01m · 91% on time, 0.0% cancelled
Total trip 9h 15m, scheduled departure to arrival (Seattle is 2 h behind Houston). Times are local. Both flew on 22 of the last 56 days.
Makes the connection96%The first flight arrived more than 94 minutes late on 4% of the days it flew: too late for the 90-minute minimum connection on a 3h 04m layover.
Arrives on time88%First flight not cancelled (0.0% are) × connection made (96%) × second flight not cancelled (0.0% are) and within 15 minutes (91%).
Total trip9h 15mHOU 07:45 to SEA 14:53, 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.