Eurotunnel has said a greater police presence and new security fencing has seen the number of migrants trying to gain access to its terminal in France fall dramatically in recent weeks.
The company said the number of attempts to access the terminal has fallen to 150 a night, down from 2,000 last month.
John Keefe, from Eurotunnel, said the company was back to running a full quality passenger service and four freight services an hour at night.
The Government promised to invest £7m to boost security in Calais by sending additional security guards, sniffer dogs and more surveillance equipment to tackle the crisis.
But tighter security controls have also prompted criminal gangs to charge even more to take migrants through to the UK.
Aid volunteer Maya Konforti told Sky News: "People don’t realise that the harder the border is to cross, the more smuggling rings develop, find ways to cross, and they increase their prices."
Whilst many migrants are still attempting to gain access to the Eurotunnel terminal, the majority are now focusing on the port and trying to smuggle themselves into lorries heading for Dover.
Earlier this week, footage emerged of suspected migrants climbing out of vehicles on a car transporter near the M2 in Rochester.
Eurotunnel also believes some are now using the Port of Dunkirk, although sailings are less frequent than those from Calais.
Earlier this month a suspected illegal immigrant was arrested after allegedly walking almost the entire 31-mile length of the Channel Tunnel.
Abdul Rahman Haroun, 40, who is understood to be Sudanese, was arrested at the scene by Kent Police.
At least nine people have died trying to reach Britain from Calais this year alone.
