Southwest Airlines plans to appeal a judge's order that lets Delta Air Lines continue operating at Dallas Love Field during a dispute over gates.
Dallas-based Southwest Airlines Co. on Tuesday filed notice that it will appeal to the 5th U.S. Circuit Court of Appeals.
A federal judge in Dallas on Jan. 8 blocked efforts by Southwest to evict Delta from city-owned Love Field, saying Delta passengers could be inconvenienced by any move.
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Delta also serves Dallas-Fort Worth International Airport.
Delta had used Love Field gates leased by United Airlines, but Southwest paid United $120 million to sublease those gates and wants the space.
Love Field rules allow new competitors to use gates if they are idle long enough for more flights.
Southwest controls 18 of Love Field's 20 gates.