The Easter getaway sent Heathrow passenger numbers soaring in April, giving the airport its 30th month of consecutive growth
The London hub handled 6.79 million passengers last month, a rise of 3.3% on last April.
This averaged 226,600 daily passengers or the equivalent of the population of Aberdeen, according to Heathrow.
North America was the top market with new flights to Nashville, Pittsburgh and Charleston helping to push up passenger numbers by 7.5% month-on-month.
New routes to Durban, Marrakesh and the Seychelles led to a 12% increase in passengers travelling to Africa.
Three new flights a week were announced by Air China to Chengdu with an annual capacity of 80,000.
Heathrow chief executive John Holland-Kaye said: “Increasing passenger demand and new long-haul and domestic routes are a reminder of the critical role aviation plays in our economy, connecting all of Britain to global growth.
“However, to maintain the economic benefits of flying for future generations, aviation must play its part in keeping global warming within 1.5 degrees.
“Carbon is the problem, not flying, and Heathrow is taking a lead in moving the global aviation sector to net zero carbon emissions by 2050.”
