A Korean Air Boeing 787-9 passenger jet [YONHAP]

Korea and China have agreed to expand weekly flight rights between the countries for the first time in seven years, Seoul's Ministry of Land, Infrastructure and Transport said on Thursday, in another sign of warming ties between the Asian neighbors.

The agreement, reached at bilateral aviation talks held in Seoul on May 27 to 28, will increase passenger flight rights by 56 weekly flights to 664 from 608, and cargo rights by 14 weekly flights to 68 from 54, the ministry said.

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The ministry said the deal would make it easier to add flights on high-demand routes such as Incheon-Shanghai and Incheon-Guangzhou, where existing rights had been fully used by both sides.