Can-i-take-microwave-oven-in-flight, why certain items are not allowed as passenger baggage or cargo is because that item can be a harmful thing or in airline parlance dg (dangerous goods). dangerous goods are things that can be dangerous by itself or become dangerous when in contact.... Checked bags: yes microwave is allowed through the checkpoint. please check with your airline for their policy. for more prohibited items, please go to the 'what can i bring?' page.