British Airways reportedly offloaded a couple from a London to Jamaica flight at an island air force base in the Azores after a row broke out over their demands for an upgrade to business class.
The Boeing 777 had left Gatwick for the Jamaican capital Kingston late on Wednesday.
“The pilot decided to land in Lajes in the island of Terceira because of a dispute between cabin crew and a couple who wanted to be transferred from economy class to first class,” a Portuguese air force spokesman told the AFP news agency.
He said the couple, from Britain, had filmed the dispute on a mobile phone, according to The Daily Telegraph.
“The British couple will remain in Terceira and will be questioned by police,” the military spokesman said.