The men, who were arrested in their homes in Gothenburg on Tuesday morning, are aged 21, 32, 33 and 36. They all come from the Gothenburg area.
Some of them are, according to police, linked to a criminal motorcycle gang called the Bandidos.
On Friday a 20 year old man was also remanded in custody on suspicion of receiving stolen goods.
After the men were seized on Tuesday, police searched their homes as well as a property used by the Bandidos in the Gamlestaden part of Gothenburg.
The Landvetter robbers made off with millions of kronor. On March 7th, at least four armed men raided the plane’s hold while passengers were disembarking.
On the evening of the robbery a 37 year old man was arrested in Bohus, north of the city. He is also in custody.
Another man is suspected of involvement in the crime and he has been charged in his absence.