Tube, train and DLR commuters using stations in Stratford are to get a fares cut in a bid to boost the Olympic Park.
Mayor Boris Johnson has agreed to move Stratford from Zone 3 to Zone 2, making travel to central London cheaper.
The move will also place Stratford in the same travelcard zone as Canary Wharf.
But confusingly, two intermediate stations on the Jubilee Line, West Ham and Canning Town, look set to remain in Zone 3.
The change will see Stratford, Stratford International and Stratford High Street officially designated as Zone 2/3 stations.
The cut in income from commuters and tourists is expected to leave Transport for London £7m-a-year worse off.
Boris Johnson said it would accelerate the economic, social and cultural potential of the Queen Elizabeth Olympic Park.
"I am determined to use all the levers at my disposal to exploit the unique and exceptional opportunities at this site and recognise the shifting economic map of London.
"We will be moving Stratford's stations - and one of the largest and most connected transport hubs in the country - into a new zone."This is an additional measure to support the ambitious regeneration plans we have in place."