Select "Foreign Trade" from the left-hand menu under the heading "Search Countries & Consumers."
Select a variable (e.g. "export by destination," "export by commodity," "import by origination," "import by commodity")
Select two countries and run the report to see your data displayed in a table.
World Development Indicators from the World Bank also provides import/export statistics. Use the "Find an Indicator" search box to find your data series.