Nonstop route
St Louis to Salt Lake City nonstop
Yes — Delta and Southwest fly STL to SLC nonstop year-round — about 3× daily.
STLSt Louis
✈
SLCSalt Lake City
3× daily21 flights a week
Year-round21/wk Jun vs 13.5/wk Jan
$200–$375typical one-way · median $275
1,156miles nonstop
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Fares are what people actually paid: half of the 1,057 tickets in the US DOT fare survey for this route sold between $200 and $375 one way, median $275. 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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