The investment will deliver wide-ranging benefits to passengers and help secure air links to even more global destinations, it says.
The centrepiece is a £600m extension to the airport’s existing terminal, which will create a more spacious environment, with more seating areas plus new shops, bars.
The plans were announced at the government’s International Investment Summit.
Planning permission for the extension was secured last October.
The terminal development will help enable the airport serve up to 43 million passengers a year, which in turn will create up to 5,000 new on-site jobs.
This could double the airport’s economic contribution to £2 billion annually.
Also included in the airport’s £1.1bn investment programme are a number of projects to enhance the passenger journey such as:
Enlarged security hall and installation of next gen security equipment
14.3MW on-site solar farm to supply current and future energy needs
New and additional terminal and gate area seating
New wayfinding kiosks across the terminal
Gate room reconfiguration to create more space for passengers pre-boarding their aircraft
Flooring and seating upgrades across satellite two plus new bar area
Refurbishment of terminal toilet facilities
Airfield taxiway upgrade
In addition, a number of other projects have already been completed or underway with airport partners, including a new EV charging forecourt and drive-thru restaurants.