Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
San Francisco → Ontario via Las Vegas: arrives on time 49%
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11:20 SFO → 13:10 LASF9 4158 · Frontier · 1h 50m · 67% on time, 1.1% cancelled
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49m layover in Las Vegas (LAS) · 45 min minimum on one ticket
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13:59 LAS → 15:09 ONTF9 1357 · Frontier · 1h 10m · 82% on time, 0.4% cancelled
Total trip 3h 49m, scheduled departure to arrival. Times are local. Both flew on 44 of the last 56 days.
Makes the connection60%The first flight arrived more than 4 minutes late on 40% of the days it flew: too late for the 45-minute minimum connection on a 49m layover.
Arrives on time49%First flight not cancelled (1.1% are) × connection made (60%) × second flight not cancelled (0.4% are) and within 15 minutes (82%).
Total trip3h 49mSFO 11:20 to ONT 15:09, 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.