Nonstop route
Oklahoma City to Houston nonstop
Yes — United flies OKC to IAH nonstop year-round — about 3× daily.
OKCOklahoma City
✈
IAHHouston
3× daily21 flights a week
Year-round21/wk Jun vs 23.5/wk Jan
$175–$325typical one-way · median $225
395miles nonstop
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Fares are what people actually paid: half of the 1,391 tickets in the US DOT fare survey for this route sold between $175 and $325 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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