The port said 72,000 passengers, which it estimated to equal more than 200 miles worth of traffic, was cleared on Sunday (24 July).
Queues were also said to have built up at the Eurotunnel terminal at Folkestone with reports of travellers being held for up to 21 hours.
In a statement, chief executive Doug Bannister said: "The backlog of tourist passengers that was generated on Friday has also now been cleared along with successfully getting Saturday’s holidaymakers off on their way.
