[article] The scramble is on for the two Dallas Love Field gates that American Airlines Inc. must give up as part of a lawsuit settlement. Delta Air Lines Inc., which said Wednesday that it wanted the gates, announced Thursday that it would add 18 flights to five major cities out of Love Field if it is picked to get those gates. Southwest Airlines Co., which already has 16 of 20 gates planned for Love Field’s new terminal, also has said it would like to acquire American’s gates. Virgin America Inc., which flies to Dallas/Fort Worth International Airport from Los Angeles and San Francisco, said Thursday that it’s looking seriously at seeking the gates. And Spirit Airlines, which flies to more than two dozen cities out of D/FW Airport, said it is also considering a possible bid. But Delta was quickest to stake a claim on the Love Field gates, despite discouraging words from a Justice Department official about that prospect.