Reeves confirmed the government is backing plans to build a third runway at Heathrow Airport, arguing it could create 100,000 jobs.
The plans received parliamentary approval in June 2018, but have been stuck in limbo after legal challenges ever since.
She invited Heathrow to submit plans to expand the airport by the end of the summer, but promised the government would only sign them off if they were “in line with legal environmental and climate objectives”.
The government has already backed the expansion of City Airport and Stansted Airport around London.
A decision to expand Luton Airport and build an emergency runway at Gatwick Airport will be delivered soon, she promised.
The government will work with local authorities to reopen the Doncaster Sheffield Airport, aiming to turn it into a thriving regional hub.
There will also be a new partnership between Prologis and Manchester Airport Group will build a new advanced manufacturing and logistics park, resulting in £1bn of investment and 2,000 jobs, Reeves said.
Reeves later said a third runway could be built by 2035, however others believe it will be closer to 2050.