British Airways, Iberia and Vueling all post improved first-quarter result, but Irish carrier’s losses almost double. IAG airline profitability was led by British Airways and Iberia during the first quarter, but Aer Lingus is evaluating its network plans for next year amid higher fuel costs and on the back of widened seasonal losses. In fact,… The post Aer Lingus lags IAG sister carriers in first quarter first appeared on FlightGlobal.