Spirit Airlines (NK, Fort Lauderdale International) and Frontier Airlines (F9, Denver International) are objecting to the US Department of Transportation (DOT) tentatively having refused their application for slot pairs at Washington National and for having provisionally approved Alaska Airlines‘ application instead.

In June, the DOT issued a slot exemption proceeding notice for Washington National (DCA), calling for applications for ten slots (five slot pairs) for daily flights. Four slot pairs are designated for…

Source: ch aviation
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