獨自旅行 的英文怎麼說?

[1] travel alone[2] travel solo[3] travel by ourselves[4] travel independently[5] travel without a tour group[6] take/make/go on/do a trip without a tour group

自由行 = travel alone = travel independently = travel by ourselves
套裝行程 = a package tour = a package deal
旅行團 = a tour group
去旅遊 = take a trip = make a trip = go on a trip = do trip

例如: Let's take a trip to Niagara.