Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Chicago → Los Angeles via Boston: arrives on time 17%
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15:08 ORD → 18:47 BOSAA 2303 · American · 2h 39m · 49% on time, 4.2% cancelled
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48m layover in Boston (BOS) · 45 min minimum on one ticket
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19:35 BOS → 22:58 LAXAA 1691 · American · 6h 23m · 46% on time, 6.7% cancelled
Total trip 9h 50m, scheduled departure to arrival (Los Angeles is 2 h behind Chicago). Times are local. Both flew on 30 of the last 56 days.
Makes the connection42%The first flight arrived more than 3 minutes late on 58% of the days it flew: too late for the 45-minute minimum connection on a 48m layover.
Arrives on time17%First flight not cancelled (4.2% are) × connection made (42%) × second flight not cancelled (6.7% are) and within 15 minutes (46%).
Total trip9h 50mORD 15:08 to LAX 22:58, 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.