Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Kansas City → Seattle via San Francisco: arrives on time 22%
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19:59 MCI → 21:50 SFOUA 1429 · United · 3h 51m · 24% on time, 1.4% cancelled
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1h 09m layover in San Francisco (SFO) · 45 min minimum on one ticket
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22:59 SFO → 01:29 SEA +1 dayUA 5579 · United, flown by SkyWest · 2h 30m · 72% on time, 0.7% cancelled
Total trip 7h 30m, scheduled departure to arrival (Seattle is 2 h behind Kansas City). Times are local. Both flew on 36 of the last 56 days.
Makes the connection31%The first flight arrived more than 24 minutes late on 69% of the days it flew: too late for the 45-minute minimum connection on a 1h 09m layover.
Arrives on time22%First flight not cancelled (1.4% are) × connection made (31%) × second flight not cancelled (0.7% are) and within 15 minutes (72%).
Total trip7h 30mMCI 19:59 to SEA 01:29, 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.