The airline says all flights to and from London Gatwick and London City airports will operate normally.
The majority of flights to and from London Heathrow will operate as normal.
But BA said it would be merging a "very small number" of flights to and from Heathrow.
That means some customers will travel slightly earlier or later.
The airline said in a statement that customers affected were being contacted with the options available for them.
The dispute concerns about 4,000 staff - some 15% of BA`s cabin crew - who have joined the airline since 2010 on "mixed fleet" contracts and who do not feel they are paid enough. About 2,500 of them are Unite members.
Earnings were advertised between £21,000 and £25,000, but the Unite union says that in reality, they start at just over £12,000 - plus £3 an hour flying pay.
The strike reflects cabin crew`s rejection of a new pay offer.
An earlier strike, planned for Christmas, was suspended after that offer was made, but members rejected it by 7-1.
Strike will not stop BA passenger trips
06 January 2017
Read: 1406
British Airways says all customers will be able to fly to their destinations on Tuesday 10 January and Wednesday 11 January, despite proposed industrial action by Unite union cabin crew.
