Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
New York → Ontario via Denver: arrives on time 23%
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16:50 LGA → 19:30 DENWN 2456 · Southwest · 4h 40m · 41% on time, 8.6% cancelled
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1h 45m layover in Denver (DEN) · 45 min minimum on one ticket
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21:15 DEN → 22:35 ONTWN 1663 · Southwest · 2h 20m · 35% on time, 0.0% cancelled
Total trip 8h 45m, scheduled departure to arrival (Ontario is 3 h behind New York). Times are local. Both flew on 55 of the last 56 days.
Makes the connection71%The first flight arrived more than 60 minutes late on 29% of the days it flew: too late for the 45-minute minimum connection on a 1h 45m layover.
Arrives on time23%First flight not cancelled (8.6% are) × connection made (71%) × second flight not cancelled (0.0% are) and within 15 minutes (35%).
Total trip8h 45mLGA 16:50 to ONT 22:35, 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.