Southwest Airlines announced service increases from Denver and St. Louis. From DEN it will launch daily flights to Hartford, Boise, Ontario, Detroit and Washington Dulles on March 14, as well as a third daily frequency to Oklahoma City. In May it will start Saturday flights to New York LaGuardia along with additional frequencies to seven US cities. SWA said it has acquired two additional gates on Concourse C, giving it 12 at the airport. In May it will add new flights from STL to Nashville, ...

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