New services by Monarch and Wizz Air helped passenger numbers at Luton airport climb by 9% to more than one million last month.
The airport handled 948,300 scheduled and 72,200 charter passengers in July.
Palma was the most popular destination, followed by Budapest and Malaga.
Official figures last month showed that Luton was the fastest-growing major airport in the London area, increasing passenger numbers by 11.3% in the first half of the year over the same period in 2010.
Managing director Glyn Jones said: “More business and holiday travellers have come through London’s fastest-growing major airport due to the competitive airline partnerships we have attracted.
“We are now focused on further improving our infrastructure to ensure higher quality of service for our higher volumes of passengers.”