Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Houston → Seattle via Denver: arrives on time 77%
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06:30 IAH → 08:06 DENF9 3229 · Frontier · 2h 36m · 88% on time, 0.6% cancelled
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3h 54m layover in Denver (DEN) · 45 min minimum on one ticket
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12:00 DEN → 14:01 SEAF9 1175 · Frontier · 3h 04m · 81% on time, 2.2% cancelled
Total trip 9h 34m, scheduled departure to arrival (Seattle is 2 h behind Houston). Times are local. Both flew on 55 of the last 56 days.
Makes the connection98%The first flight arrived more than 189 minutes late on 2% of the days it flew: too late for the 45-minute minimum connection on a 3h 54m layover.
Arrives on time77%First flight not cancelled (0.6% are) × connection made (98%) × second flight not cancelled (2.2% are) and within 15 minutes (81%).
Total trip9h 34mIAH 06:30 to SEA 14:01, 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.