Air travellers will face delays again with Australian border force and immigration officials resuming their airport strikes on Wednesday.

The Community and Public Sector Union cancelled its strikes over Easter in response to an appeal from the prime minister after the deadly Brussels attacks.

The industrial action is the latest step in the union's two-year battle with the federal government over pay and work conditions for public sector workers.

Affected airports

* Sydney International Airport


* Perth Airport

* Adelaide Airport

* Brisbane International Airport

* Cairns International Airport

* Townsville Airport

* Darwin Airport