Delta says higher airfares expected to last despite drop in oil prices

Company reports $1.4bn profit despite its highest quarterly fuel expense in historyDelta Airlines saidelevated airfares are likely to last despite a recent drop in oil prices, reporting strong appetite for travel and record-high revenue in its quarterly results Friday.Though the company had its highest quarterly fuel expense in its history, demand has been high enough to pass along 60% of its extra fuel costs to con…