The Fédération Nationale des Ports et Docks said that the action will be suspended until 26 September.
The strikes, which began last month, involved non-Condor port staff across France and led to cancellations and the rescheduling of several St Malo departures.
A Condor spokesperson said: “We are delighted that the action has been halted as it was causing disruption to cross-Channel sailings for all operators, including Condor.
“Now that we have returned to daily departures from both Islands, we are confident that summer travel will proceed without interruption, allowing islanders and visitors to enjoy their holidays as planned.”