Seoul’s main airport, Incheon, was the worst affected, with passengers facing delays of about two hours on average, while 31 per cent of flights were delayed and 16 pe cent cancelled on Thursday, plane tracking website Flightradar24 showed.

South Korea's capital was blanketed on Wednesday by the heaviest snowfall in Seoul during November on record, with bad weather snarling traffic, knocking out power and grounding hundreds of flights as authorities braced for more snow in coming days.