Heathrow says third runway cannot open until 2039

Heathrow has told UK ministers it cannot open its third runway by 2035, now expecting 2039. The airport still hopes to secure planning permission by 2029, with opening within a decade after consent. Heathrow, the UK's largest and busiest airport, says its existing runways have been full for over two decades. The 2029 planning decision now determines whether 2039 holds.