It will be interesting to see if this suspension of flights had anything to do with North Korea:
South Korea’s transport ministry said Monday it temporarily suspended flights at the Gimpo and Incheon international airports, but it didn’t specify the reason.
At the request of the Joint Chiefs of Staff, the Ministry of Land, Infrastructure and Transport said it had banned flights at the country’s two major airports for about an hour Monday afternoon.
Flights at the Gimpo and Incheon airports resumed at 2:10 p.m. after the flights were halted at 1:08 p.m. and 1:22 p.m., respectively, the ministry said.
Twenty flights at Gimpo and 10 flights at Incheon were delayed due to the suspension order, according to the airports’ operators.
Yonhap
You can read more at the link, but Incheon International Airport I have always felt is a very easy provocation target for North Korea that would have immense impact on South Korea.
