Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Santa Ana → Chicago via San Francisco: arrives on time 56%
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19:27 SNA → 21:05 SFOUA 5339 · United, flown by SkyWest · 1h 38m · 50% on time, 2.9% cancelled
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1h 33m layover in San Francisco (SFO) · 45 min minimum on one ticket
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22:38 SFO → 05:01 ORD +1 dayUA 2278 · United · 4h 23m · 81% on time, 2.4% cancelled
Total trip 7h 34m, scheduled departure to arrival (Chicago is 2 h ahead of Santa Ana). Times are local. Both flew on 56 of the last 56 days.
Makes the connection73%The first flight arrived more than 48 minutes late on 27% of the days it flew: too late for the 45-minute minimum connection on a 1h 33m layover.
Arrives on time56%First flight not cancelled (2.9% are) × connection made (73%) × second flight not cancelled (2.4% are) and within 15 minutes (81%).
Total trip7h 34mSNA 19:27 to ORD 05:01, 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.