Deutsche Lufthansa AG and United Continental Holdings Inc. may cede airport slots in Frankfurt and New York in a bid to end a European Union antitrust probe of their A++ trans-Atlantic venture also involving Air Canada. EU regulators said they are seeking views from competitors and customers on the offer that would enable rivals to start as many as seven weekly flights between Frankfurt and New York's John F. Kennedy or Newark Liberty airports, according to a statement on the European Commission's website today. A settlement would permit the venture to go ahead without the risk of EU fines.