Strike action by 4,000 Heathrow staff that was scheduled for today has been called off.
Union Unite said it would be suspended while the workforce votes on an improved pay offer.
Unite has agreed a new pay package with the airport, however says it will not release details until the deal has been voted on by members.
Numerous flights had been preemptively moved, and passengers are being advised to check with their airlines.
Yesterday 16 flights were cancelled, according to the BBC.
Unite said yesterday that strikes planned for August 23 and 24 are still on the table until the member vote is complete.
Last month Heathrow workers voted in favour of industrial action by 97.6 per cent on a turnout of 90.2 per cent.
The first planned strike, on July 26 and 27, was also suspended.
Passengers also face possible disruption due to a British Airways pilot strike, which may take place towards the end of August.
On July 31, British Airways parent company IAG was denied an injunction aimed at preventing the walkout.
The airline is currently in talks with the British Airline Pilots’ Association, who say they will give 14 days’ notice before any strike action.