Nonstop route
San Diego to Detroit nonstop
Yes — Delta flies SAN to DTW nonstop year-round — about 4× daily.
SANSan Diego
✈
DTWDetroit
4× daily24.5 flights a week
Year-round24.5/wk Jun vs 20.8/wk Jan
$225–$425typical one-way · median $300
1,956miles nonstop
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Fares are what people actually paid: half of the 2,370 tickets in the US DOT fare survey for this route sold between $225 and $425 one way, median $300. That survey runs a couple of quarters behind, so treat it as the shape of the route's pricing rather than today's quote.
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