Airport capacity at some south-east England airports, including Luton and Stansted, is underused, according to a London Assembly report.
Stansted Airport expects over 220,000 passengers to pass through the terminal across the Easter bank holiday weekend.
The company formerly known as BAA is to sell Stansted airport to the Manchester Airports group for £1.5 billion.
A120 partially blocked due to an accident, two vehicles involved at M11 J8a / Round Coppice Road (Stansted Airport).
Air passengers will today be given the first indication of how fares will change over the next five years at the capital's three main airports.
The Civil Aviation Authority will outline its initial proposals for how much airlines will be charged over the period 2014-19.
The plans will have an impact on fares at Heathrow, Gatwick and Stansted airports.
The three airports are the only ones regulated by the CAA, which can cap the amount the airports can impose on airlines in take-off and landing fees.
Today's announcement from the CAA will represent the authority's initial proposals with a final decision due in January next year.
The mayor of London Boris Johnson has said it would be 'nuts' to build a third runway at Heathrow. He has previously said expanding Stansted is a better option.
Mr Johnson was speaking at a cross-party rally held in Barnes against Heathrow's third runway.
The mayor has said he favours a new "Boris island" airport in the Thames Estuary or possible expansion at Stansted.
Campaigners are calling for night flights to and from Stansted Airport to be phased out. The Stop Stansted Expansion group has presented a 10,000 word submission to a government consultation on night flying at Heathrow, Gatwick and Stansted Airports.
Airlines, freight carriers and the Royal Mail are also expected to make submissions during the consultation process.
Passenger numbers at Stansted Airport were up by almost 4% last month compared to the same period last year. The Essex airport, which is now owned by Manchester Airports Group, was used by more than 1.34 million passengers in March 2013.
New figures from the Civil Aviation Authority show that passenger numbers at Luton and Southend airports rose last year.
At Luton passenger numbers rose by 1.1% to 9.6 million and at Southend, where there has been major expansion, the number of passengers rose from 42,000 to 617,000.
Stansted saw numbers drop from just over 18 million to 17.4 million passengers - a fall of 3.2%.
Essex MPs have called for improved rail links to Stansted in a bid to give the region an economic boost.
Sir Alan Haselhurst is one of the MP's calling for the developments and has been talking to ITV News Anglia.
Millions of pounds in investment and more choice for passengers were two of the promises made today by the new owners of Stansted airport.
M.A.G, which is owned by local councils in the North West, has spent £1.5 billion to acquire Stansted from the owners of Heathrow.
MAG already run three other airports including Manchester making them the country's biggest UK-owned operator. Some have welcomed the change of ownership but others aren't so happy.
Click below to watch a report by ITV News Anglia's Business Correspondent Matthew Hudson:
Click here to see what travel journalist Simon Calder had to say about the new owners of Stansted airport