Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Tucson → Chicago via San Francisco: arrives on time 68%
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15:28 TUS → 17:50 SFOUA 5583 · United, flown by SkyWest · 2h 22m · 76% on time, 0.3% cancelled
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1h 10m layover in San Francisco (SFO) · 45 min minimum on one ticket
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19:00 SFO → 01:28 ORD +1 dayUA 1958 · United · 4h 28m · 92% on time, 7.7% cancelled
Total trip 8h 00m, scheduled departure to arrival (Chicago is 2 h ahead of Tucson). Times are local. Both flew on 0 of the last 56 days, too few to list among the best connections.
Makes the connection81%The first flight arrived more than 25 minutes late on 19% of the days it flew: too late for the 45-minute minimum connection on a 1h 10m layover.
Arrives on time68%First flight not cancelled (0.3% are) × connection made (81%) × second flight not cancelled (7.7% are) and within 15 minutes (92%).
Total trip8h 00mTUS 15:28 to ORD 01:28, 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.