British Airways says it is aiming to run a "near normal schedule" at Gatwick and the "majority of services" from Heathrow on Sunday after a "major" IT failure saw all flights cancelled, APA reports quoting BBC.
Serious problems with BA's systems led to thousands of passengers having their plans disrupted on Saturday.
Passengers described "chaotic" scenes at the airports, with some criticising BA for a lack of information.
The airline apologised and said it was refunding and rebooking customers.
BA advised customers to continue checking the status of their flight on its website www.ba.com before travelling to the airport.
The airline said there was no evidence the computer problems were the result of a cyber attack.
The company's chief executive Alex Cruz had said it was believed "the root cause was a power supply issue".
Other airlines flying in and out of the two airports were unaffected.
The IT failure had affected check-in and operational systems, including customer service phone lines.
BA said although some of its IT systems have returned, "there will be some knock-on disruption to our schedules as aircraft and crews are out of position around the world.
"We are repositioning some aircraft during the night to enable us to operate as much of our schedule as possible throughout Sunday."
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