An American Airlines passenger plane approaches landing at LAX during the coronavirus disease (COVID-19) outbreak in Los Angeles, California on April 7, 2021.

Mike Blake | Reuters

American Airlines said Wednesday that August revenue is lower than expected as a surge in Covid cases lowers bookings, the newest airline warning of the impact of infection on sales.

“It has been and we expect it will continue to be a very troubled recovery,” said Vasu Raja, American chief revenue officer, during an investor conference.

Raja said July revenue rose above the airline’s expectations, but the surge in Covid cases resulted in weaker short-term bookings and higher cancellations.

“Given the fluidity of the current demand environment, we are not ready at this point to make any final adjustments to our capacity plans or guidelines,” said Raja.