American Airlines plans a gradual resumption of transatlantic services despite slumping to a $2.2 billion first quarter loss.
The carrier has applied for more than $10 billion in state aid, including $5.8 billion to pay salaries while more flights remain grounded and a $4.8 billion loan.
Capacity has been slashed by 80% in both April and May, and 70% in June.
However, a number of London services are to return in the summer.
The airline is to resume service from Chicago to Heathrow on June 4 with five flights a week, followed by New York JFK-Heathrow on June 7 with two flights a week.
Los Angeles, Philadelphia and Raleigh-Durham services to Heathrow are due to return on July 7.
Cabin crew will be required to wear face masks from today (Friday) while masks will be distributed to passengers “as supplies and operational conditions allow”.
The airline will temporarily relax its seating policies and adjust airport procedures to encourage social distancing.
Reduced in-flight food and drinks service will operate to limit contact.
The carrier, which made a profit of $185 million in the same period last year, is reportedly expected to burn through $70 million a day in the second quarter.
Chairman and chief executive Doug Parker said: “Never before has our airline, or our industry, faced such a significant challenge.”
“We have moved quickly and aggressively to reduce our costs and bolster our liquidity.
“We have a lot of difficult work ahead of us. And while there is still uncertainty in what’s to come, we are confident that through the dedication of the American Airlines team and our swift actions, we will get through this for our team, our customers and our shareholders.”
The airline has accelerated the retirement of four aircraft types, including 20 Embraer 190s, 34 Boeing 757s, 17 Boeing 767s and nine Airbus A330-300s, along with a number of older regional aircraft.
“These changes remove operating complexity and bring forward cost savings and efficiencies associated with operating fewer aircraft types,” American said.
Almost 39,000 staff have opted for an early retirement, a reduced work schedule or partially paid leave.