Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Chicago via Atlanta: arrives on time 28%
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08:40 SEA → 16:33 ATLDL 797 · Delta · 4h 53m · 69% on time, 1.6% cancelled
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48m layover in Atlanta (ATL) · 45 min minimum on one ticket
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17:21 ATL → 18:42 ORDDL 2879 · Delta · 2h 21m · 49% on time, 2.3% cancelled
Total trip 8h 02m, scheduled departure to arrival (Chicago is 2 h ahead of Seattle). Times are local. Both flew on 55 of the last 56 days.
Makes the connection59%The first flight arrived more than 3 minutes late on 41% of the days it flew: too late for the 45-minute minimum connection on a 48m layover.
Arrives on time28%First flight not cancelled (1.6% are) × connection made (59%) × second flight not cancelled (2.3% are) and within 15 minutes (49%).
Total trip8h 02mSEA 08:40 to ORD 18:42, 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.