Delta executives see a strong upswing in corporate travel later this year as vaccinations become more widespread and offices continue to open. Glen Hauenstein, the company president, said on an earnings call that Delta anticipates significant increases in corporate travel after Labor Day as the more traditional business travel season begins. He said the carrier’s most recent quarterly corporate survey showed that one-third of accounts expect to increase travel volume in the June quarter and a majority of customers expect to return to the office in the second half of the year. Once the corporate recovery begins, said Hauenstein, the airline expects that will also prove to be “a powerful cash and profitability lever for our business.” He said international travel remains “muted,” with long-haul international booking volumes at only 15% to 25% recovered. Hauenstein said Delta will reduce pre-tax losses by more than half in the second quarter and could return to profitability as soon as the third quarter.