The airline said 420 of its 500 scheduled flights were taking off from London's Heathrow Airport -- 85 percent of its short-haul flights and 80 percent of its long-hauls.
But with tens of thousands of passengers still backed up by a daylong strike that ended Friday, the airline said service would not reach normal levels for several more days.
The strike was triggered by a dispute between catering staff and the US-owned firm Gate Gourmet, which provides onboard meals for British Airways.
''Like all the people here, I am not pleased, but I am accepting the situation," said Latific Vanja, a Norwegian who was stranded in London with his wife and two young children after flying in Friday from Los Angeles. ''There's been a lot of confusion, but I am happier now that I know I will be going home tomorrow," said Vanja, who was told his flight home to Oslo would leave today.
In huge tents put up outside terminals, passengers were given free coffee and tea as well as newspapers to read.
''Our priority is still to get passengers as quickly as possible to their destination," British Airways spokeswoman Pam Simpson said.
Talks continued on resolving the catering dispute.
Though all of the 1,000 striking workers returned to their jobs Friday afternoon, the airline had to get 100 aircraft and 1,000 flight crew members back to where they belonged, spokeswoman Becky Thornton said. ''It will take several days to get some stability to our schedule," she said.