Nonstop route
Ontario to Chicago nonstop
Yes — Southwest flies ONT to MDW nonstop year-round — about daily.
ONTOntario
✈
MDWChicago
daily7 flights a week
Year-round7/wk Jun vs 6.1/wk Jan
$200–$300typical one-way · median $225
1,706miles nonstop
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Fares are what people actually paid: half of the 418 tickets in the US DOT fare survey for this route sold between $200 and $300 one way, median $225. 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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