Obese people have the right to two seats for the price of one on flights within Canada, the Supreme Court of Canada ruled on Thursday.

The high court declined to hear an appeal by Canadian airlines of a decision by the Canadian Transportation Agency that people who are "functionally disabled by obesity" deserve to have two seats for one fare.

The airlines had lost an appeal at the Federal Court of Appeal in May and had sought to launch a fresh appeal at the Supreme Court. The court's decision not to hear a new appeal means the one-person-one-fare policy stands.

The appeal had been launched by Air Canada, Air Canada Jazz and WestJet.