The problem left an unknown number of passengers stranded or delayed while waiting for international flights.
The carrier said that he re-booked alternative flights for some customers and offered the hotel "to those who could not continue their travels".
The airline has hit a number of technical traps in recent years. British Airways was forced to cancel more than 100 flights in August when computer systems dropped.
In 2017, after a BT major IT system failure iptal, it canceled flights from London's Heathrow and Gatwick airports, causing a serious disruption to its global operations and accommodating 75,000 customers.
-— Jaide Garcia contributed to the reporting.