Cancellations are expected at London City Airport on Monday after an unexploded Second World War bomb was uncovered nearby.
The device was found at George V Dock during work at London City Airport on Sunday morning.
Police set up a 214-metre (700ft) exclusion zone at 10pm on Sunday night to decrease risks to the public while the device was dealt with.
The airport – which sits inside the exclusion zone – was closed, and the Metropolitan Police said properties nearby were evacuated.
Road cordons have also been put in place with drivers warned about disruption to their journeys if travelling through Newham.
A tweet from the airport said: “All passengers due to travel from London City on Monday are advised to contact their airline for further information. Passengers are advised not to travel to the airport until further notice.”
Specialist officers are working with the Royal Navy to remove the ordnance, the Metropolitan Police said.
A spokesman said on Sunday night: “At 10pm an operational decision was made with the Royal Navy to implement a 214-metre exclusion zone to ensure that the ordnance can be safely dealt with whilst limiting any risk to the public.
“There will also be disruption to inbound and outbound flights during the operation.
“London City Airport are urging passengers to contact their airline before travelling.”