After landing shortly after 9pm in the Turkish resort town of Antalaya on Wednesday night, the group, which included residents from Luleå and Sundsvall, didn't even make it to their hotel before several starting feeling ill on the bus from the airport, the local Sundvalls Tidning reported.
According to relatives, panic and chaos erupted on the bus, forcing the driver to pull over and call an ambulance.
Speaking with the Aftonbladet newspaper, Isabell Lindholm told of how her boyfriend Alexander Nyström began throwing up as soon as the bus started moving.
"I had to run around the bus collecting barf bags," she told the newspaper.
"There were a lot of people vomiting on the bus. But Alexander vomited the most. He had a bag full of puke."
Seventeen people from the group of 188 travelers were taken to hospital, while two others were also ill but didn't need require hospitalisation.
The food served on the chartered plane, which was operated by Sun Express on behalf of Swedish tour operator Ving, is thought to be the likely cause of the outbreak.
"We think that the airplane food caused this. We've already taken the chicken off the menu and Sun Express has started lab tests," Ving spokesperson Magdalena Öhrn told Sundsvalls Tidning.