Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Ontario → Chicago via Dallas-Fort Worth: arrives on time 47%
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08:17 ONT → 13:31 DFWF9 4690 · Frontier · 3h 14m · 76% on time, 0.6% cancelled
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59m layover in Dallas-Fort Worth (DFW) · 45 min minimum on one ticket
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14:30 DFW → 16:51 MDWF9 2882 · Frontier · 2h 24m · 65% on time, 1.6% cancelled
Total trip 6h 37m, scheduled departure to arrival (Chicago is 2 h ahead of Ontario). Times are local. Both flew on 27 of the last 56 days.
Makes the connection75%The first flight arrived more than 14 minutes late on 25% of the days it flew: too late for the 45-minute minimum connection on a 59m layover.
Arrives on time47%First flight not cancelled (0.6% are) × connection made (75%) × second flight not cancelled (1.6% are) and within 15 minutes (65%).
Total trip6h 37mONT 08:17 to MDW 16:51, 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.