The Mayor is also due to claim in his speech later, that the proposal to add a second runway at Gatwick offers absolutely no kind of solution to the problem.
Gatwick already has the capacity to provide more flights but Mr Johnson says that airlines frustrated by congestion at Heathrow are well aware that the greater number of transfer passengers found at mega hub airports will offer them larger profits.
Airlines are therefore choosing to move to Schipol or other hub airports - instead of Gatwick, he says.
Tom Denton, Head of Corporate Responsibility at Gatwick, said: "This project gives us an opportunity to further reduce the number of people affected by noise, as well as focus on further reducing CO2 emissions and air-quality impacts.
"Therefore this is an important time for local people and those who live within our flight paths, who now have a once-in-a-lifetime opportunity to give their feedback and influence the future of our airspace."
An inquiry is under way into reports that a Sri Lankan cricketer tried to open the door of a London-bound flight while the plane was at 35,000ft.
It is believed that the unnamed player tugged at the door for two minutes mistaking it for the toilet, with the Daily Mail reporting that one of the 229 passengers aboard the British Airways airliner described the incident as "pretty frightening".
The alleged incident happened as the Sri Lanka A team flew to Gatwick from St Lucia yesterday after playing the West Indies.
The player's board, Sri Lanka Cricket, said:
"Further to the media reports relating to an incident that took place today involving a Sri Lankan player, Sri Lanka Cricket (SLC) wishes to announce that it is disappointed to hear of such an incident and SLC will discuss with the manager of Sri Lanka A team.
"An inquiry will be conducted based on the manager's report and disciplinary action will be taken on the player concerned if found guilty."
BA said today: "There was a minor incident on board the BA2158 service from St Lucia to Gatwick involving a customer who we believe had been drinking.
"It is impossible to open an aircraft door when it is at high altitude and at no point was the aircraft in any danger. Our cabin crew are highly trained to deal with such incidents and offered reassurance to customers who were sitting near to the door."
The pair were detained after arriving back at the West Sussex airport on an easyJet flight from Palma, Majorca, at around 2pm yesterday, Sussex Police said.
The suspects, both aged 33, were held on suspicion of theft, fraud by false representation, handling stolen goods, causing a public nuisance and money laundering.
Police said the men - one from Enfield, north London, and the other who gave no address - were questioned and then freed on police bail until August 28.
The arrests came days after an alert at the airport's North Terminal short-stay car park was caused by a suspicious van which was apparently dumped there last Wednesday.
Bomb disposal experts who carried out a number of small, controlled explosions to gain access to the van found it posed no terrorist threat and contained old car parts and scrap metal.
Suspicions were first raised about the seemingly well-loaded vehicle as it was higher than the permitted height for the car park. Police said it would have required someone to lift the maximum headroom barrier that guards the entrance.
Alarm bells were further raised when routine checks found the van to be unregistered, untaxed and uninsured. And then a check with the firm whose name was on the van showed it had disposed of it six months ago.
Police called an explosive ordnance disposal unit to make a closer inspection and a pre-planned response swung into action involving airport operators, ambulance and fire services.
But when the small blasts allowed investigators to take a look inside the van, nothing sinister was discovered and resources and restrictions were stood down.