OTTAWA—A group of air travellers has lost a Federal Court bid for an interim injunction to prohibit hotel quarantines for returning passengers. Justice William Pentney says in a written ruling that the three-day stay in federally designated facilities does not put Canadians’ security at significant risk. The mandatory quarantine—part of a two-week self-isolation regime for travellers flying back from abroad—came into effect on Feb. 22 following federal measures announced the previous month. It has faced some backlash from opposition MPs, civil liberties groups and health experts for either coming too late, encroaching on individual freedoms or not going far enough. The judge says travellers “may be vexed and inconvenienced” by the quarantine and the attendant $2,000 bill, but that the risk they will unwittingly carry COVID-19 variants over the border even after testing negative before flight departure means the measures should stand until a final ruling comes down. The broader …