IAG is to launch low-cost transatlantic flights in a bid to grab a slice of the nascent market for no-frills long-haul air travel. The group said it would start flying from Barcelona’s El Prat airport to the US in June, either under the banner of a new airline, as part of “legacy” carriers BA and Iberia, or via its lowest-cost long-haul airline Aer Lingus. As well as US destinations such as Los Angeles and San Francisco, it is considering cheaper routes to Buenos Aires, Santiago, Havana and Tokyo. “This new operation will add another dimension to IAG and complement the other airlines in the group,” the company said. Using Barcelona’s El Prat airport will allow IAG to feed passengers from Vueling into the new routes, which will be flown by a pair of 300-seat Airbus A330 planes at first. <br/>