Alex Cruz told staff in an internal memo that the outbreak will lead to job cuts, "perhaps for a short period, perhaps longer term."
American Airlines and British Airways have suspended certain international flights.
Lucy Darwin took to Twitter to complain after she said she turned up on her flight to New York to find her seat was covered in crumbs.
Airline British Airways has said it has "no option but to cancel nearly 100% of flights" due to the 48 hour strike action by pilots.
Passengers aboard the BA flight to Los Angeles had to be removed while sniffer dogs inspected the plane.
Multiple pilots reported fast-moving bright lights flying alongside their aircraft.
Passengers shared images of children sleeping on the floor at New York's JFK Airport.
The claim comes from a senior Indian bureaucrat
Patricia Casey was going through a "messy divorce" and "self-medicating" with alcohol.
The video shows a woman dressed in BA uniform mocking Nigerian passengers for their perceived belligerence and the purported size of their genitals.
An IT system failure left 75,000 passengers stranded. The airline needs more than yoga mats to fix the issue.
U.S. bound travellers took to Twitter to complain of cancellations and long delays.
British Airways denies that any changes have been made to its in-flight catering.
The flight left London at 11:34 a.m. and arrived in Boston at 1:28 p.m.
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