City of Derry Airport may be forced to close on 16 and 17 July if workers walk out in a dispute over pay.
Unions representing firefighters, baggage handlers and cleaners were urged by Derry City Council to exempt their members from the UK-wide strike.
Joe Miller, chairman of the Airport Committee said talks are continuing to try to reach a resolution.
"If there's no firefighters, a plane would simply not be allowed to land or take off," he said.
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