Amid rising numbers of novel coronavirus (Covid-19) cases in the country, the property is now scheduled to reopen on 5 October.
While it was originally set to be a two-day closure, to 23 August, this was pushed back to 29 August. Reopening was then delayed until 7 September, and then 21 September.
This, the operator said, is likely to mean it loses out on KRW53.9bn (£36.1m/€39.3m/$46.3m) in revenue during the closure.
Kangwon Land has already been badly affected by Covid-19, with revenue falling 63.5% to KRW270.6bn in the first six months of 2020, after it was closed from 23 February due to the pandemic.