Free domestic flights for children under 12 travelling with a full paying adult are being offered by British Airways.
The deal covers journeys between Heathrow and Edinburgh, Aberdeen, Glasgow, Leeds-Bradford, Newcastle and Belfast.
Two children can fly for free when travelling with an adult even during the school holidays.
The offer covers Euro Traveller tickets booked until May 13 for travel between June 1 and November 5.
The airline has also opened a permanent family check in area at Terminal 5 in Zone A with a dedicated security lane for parents and children.
BA chief commercial officer Adam Daniels said: “We know it can be a struggle to keep the kids entertained over the summer holidays and once one break from school finishes parents have to start turning their attention to the next one.
“With so many fantastic tourist attractions and activities for kids across Britain, the offer also looks set to give UK tourism a boost by encouraging families to visit London, the North, Scotland and Northern Ireland for their holidays.”
Simon Eastburn, Heathrow airline business development director, added: “Summer brings with it more opportunity for families to explore and this partnership with British Airways means children can discover and learn more about the UK, complementing our free travel on the Heathrow Express and Kids eat Free in Heathrow restaurants.”