Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026
Seattle → Ontario via Salt Lake City: arrives on time 85%
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07:15 SEA → 10:23 SLCDL 2858 · Delta · 2h 08m · 96% on time, 1.2% cancelled
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56m layover in Salt Lake City (SLC) · 45 min minimum on one ticket
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11:19 SLC → 12:10 ONTDL 3172 · Delta · 1h 51m · 91% on time, 0.0% cancelled
Total trip 4h 55m, scheduled departure to arrival. Times are local. Both flew on 55 of the last 56 days.
Makes the connection95%The first flight arrived more than 11 minutes late on 5% of the days it flew: too late for the 45-minute minimum connection on a 56m layover.
Arrives on time85%First flight not cancelled (1.2% are) × connection made (95%) × second flight not cancelled (0.0% are) and within 15 minutes (91%).
Total trip4h 55mSEA 07:15 to ONT 12:10, layover included
Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.