Nonstop route
St Louis to Baltimore nonstop
Yes — Southwest flies STL to BWI nonstop year-round — about 4× daily.
STLSt Louis
✈
BWIBaltimore
4× daily27.1 flights a week
Year-round27.1/wk Jun vs 15.8/wk Jan
$150–$300typical one-way · median $200
738miles nonstop
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Fares are what people actually paid: half of the 1,702 tickets in the US DOT fare survey for this route sold between $150 and $300 one way, median $200. 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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