Cyber-Attackers Hit Sunwing Airlines. Thousands of passengers of Canadian low-cost airline face delays after third-party system was hacked. Thousands of passengers of Canadian low-cost airline, Sunwing Airlines Inc, face a fourth day of flight delays after a third-party system the airline uses was hacked, according to the CEO. It has been widely reported this week that passengers remain stranded abroad and vacations have been delayed for others because of the technical issues that began on Sunday afternoon. Third-party company: Airline Choice.