Passengers booked with Delta Air Lines faced a second day of severe disruption on Tuesday with 775 flights cancelled in the wake of a system-wide computer failure.
A further 90 flights are expected to be grounded today “leading to normal operations later” following around 1,000 cancellations on Monday.
The US carrier extended an offer of compensation to passengers “significantly affected” by delays or cancellations to cover Tuesday.
The airline also provided hotel vouchers to several thousand travellers, including more than 2,000 on Monday night at its hub in Atlanta, described as the world’s busiest.
The latest update came as the airline worked to establish normal operations after Monday morning’s outage that disrupted the flight schedule worldwide.
The outlook for Wednesday’s operation is positive, Delta officials said.
Operations and customer centre senior vice president, Dave Holtz, said: “We continued today [Tuesday] to steadily recover from the events of earlier this week that grounded our system, and are working hard to achieve a normal operation by midday tomorrow.
“We will have a small number of cancellations in the morning as our operation restarts, so we continue to ask our customers to check their travel plans and flight status.
“We apologise to everyone who has been affected by these events, and we thank them for their patience.”