United Airlines sees weak demand until coronavirus vaccine found

United Airlines Holdings Inc has warned that travel demand will remain suppressed until there is a widely accepted treatment or vaccine against the coronavirus, which plunged the carrier into a deep quarterly loss. Coronavirus infections are surging in the United States, causing some regions to scale back reopening plans and reinstate quarantines in a fresh blow to airlines. United, which is not blocking middle seats, plans to fly about 35 percent of its 2019 summer schedule in the third quarter and is expecting its planes to be about 45 percent full in July. They were about one-third full in the second quarter.