The airport saw its 30th consecutive month of passenger growth in September with a 15.6% increase compared with the same period last year.
In total, a record 1.4 million passengers chose to fly from the UK gateway last month.
To meet this continued demand LLA is currently undertaking a £110 million redevelopment project which will increase annual capacity by 50% to 18 million passengers by 2020.
Construction is well underway with the airport having already opened a new security search area and executive lounge.
According to the gateway, LLA’s transport links are also being upgraded with a new dual carriageway to the terminal, due to open this winter, and confirmation from Luton Borough Council that a new light rail link between Luton Airport Parkway station and the terminal will be in operation in 2020.
Nick Barton, CEO of LLA, said: “Reaching this huge milestone is a fantastic endorsement from our passengers as they continue to choose to fly with us.
"Demand for air travel at LLA is at an all-time high which is an indicator of the timely nature of our transformation project. We’re working hard to deliver our £110million redevelopment and create an airport that exceeds our passengers’ expectations.”