Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Tucson → Houston via San Francisco: arrives on time 38%
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09:04 TUS → 11:25 SFOUA 4683 · United, flown by SkyWest · 2h 21m · 65% on time, 0.0% cancelled
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50m layover in San Francisco (SFO) · 45 min minimum on one ticket
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12:15 SFO → 18:27 IAHUA 1387 · United · 4h 12m · 78% on time, 0.4% cancelled
Total trip 7h 23m, scheduled departure to arrival (Houston is 2 h ahead of Tucson). Times are local. Both flew on 56 of the last 56 days.
Makes the connection50%The first flight arrived more than 5 minutes late on 50% of the days it flew: too late for the 45-minute minimum connection on a 50m layover.
Arrives on time38%First flight not cancelled (0.0% are) × connection made (50%) × second flight not cancelled (0.4% are) and within 15 minutes (78%).
Total trip7h 23mTUS 09:04 to IAH 18:27, 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.