Planned strikes at Heathrow on Tuesday have been called off as workers vote on a new pay offer.
A strike by more than 4,000 workers at the airport was due to start at 00.01 and finish at 23.59pm.
Unite said it would not be revealing the details of the improved pay offer until its members in the ongoing dispute have had an opportunity to consider and vote on the new package.
The union said strike action planned for August 23 and 24 remained on the table until the result of the ballot was known.
A planned strike due to take place on Monday was also suspended at the eleventh hour, but passengers due to fly were urged to contact their airline after 177 flights were rescheduled.
A spokesman for Heathrow said: “Unite will now take an improved offer to its members and we remain hopeful that we can find a resolution and stop this disruptive and unnecessary threat of strike action.”
Meanwhile, British Airways and pilots’ union Balpa have agreed to resume talks to avoid strikes on unspecified dates this summer.
The sides have been in talks at Acas (The Advisory, Conciliation and Arbitration Service) since Wednesday afternoon in order to try and resolve the dispute.