Grounded: Many flights have been cancelled.
Many flights from Scotland have been cancelled as British Airways staff walked out on strike.
The three-day strike action, which began on Saturday morning, comes after last-ditch talks between BA and the Unite union broke down.
Four flights from Glasgow and five from Edinburgh to Heathrow have been cancelled on Saturday as a result of the action, by cabin crew in the Unite union.
Five flights from Heathrow and one from Gatwick to Glasgow; six from Heathrow and one from Gatwick to Edinburgh; and one from Heathrow to Aberdeen were also axed.
And with many more flights from London to other destinations affected, BA recommended passengers check its website before travelling to ensure they would be able to complete their journey.
The airline has claimed that 65% of its passengers will still be able to reach their destination during the strike. Some 1,100 flights out of its normal 1,950 scheduled have been axed, with cover also being provided by other airlines and charter operators.
A second strike is due to run for four days from March 27.
Talks were taking place between Willie Walsh, BA chief executive, and Unite joint general secretary Tony Woodley on Friday to try to resolve the increasingly bitter dispute, but they broken down.
Mr Woodley claimed BA had only put forward an offer that was worse than one offered, but withdrawn, the previous week. He added: "I am extremely disappointed for the travelling public and our members, but this union will now support our members, while remaining open for talks with the company.
"It is with great disappointment that I have to say the strike will go ahead. It is an absolute disgrace and an insult to our people that Mr Walsh tabled a deal that reduced the amount of pay on offer. It is mission impossible and quite frankly ridiculous to expect anyone to go to their membership with a worse offer."
In a video message posted on YouTube, Mr Walsh said he was "deeply sorry" that the strike was going to go ahead.
"I'm really disappointed we haven't been able to reach agreement," he said. "There are tens of thousands of good people in British Airways who stand ready to serve you and we're going to do our best.
"We've developed contingency plans and we're going to fly as many of our customers as possible, safely, in secure conditions and in comfort. I would prefer that we didn't have to use these plans, but we've prepared well."
The strike centres on moves by BA to reduce the number of cabin crew on long-haul flights from 15 to 14. The airline has also frozen pay and wants new members of staff to work on what Unite says are worse conditions.
The walk-out was initially due to take place over Christmas, but a legal challenge by BA meant it was postponed until a new strike ballot took place.
A BA spokesman said: "Since Monday, the number of cabin crew offering to work as normal has increased significantly. British Airways is also pleased that the number of other airlines offering their help for the strike period through charters or provision of spare seats has increased from 50 on Monday to more than 60.
"These developments have enabled the airline to reinstate some previously cancelled flights and provide extra capacity for both long-haul and short-haul destinations."
