The news comes as the North Korean army on Friday vowed a "merciless" response to any US provocation, according to the country's official news agency KCNA.
Reports of activity at a nuclear test site in North Korea ahead of Saturday's 105th anniversary of the birth of the country's founder Kim Il-Sung have fuelled speculation it could imminently carry out a sixth test.
The last Air China flight between the two capitals arrived in Beijing at 6 pm Friday, CCTV said, without elaborating on the suspension.
North Korea's flag-carrier Air Koryo remains the only company that continues to operate flights into the country.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
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