You probably won't need to visit an Ikea while vacationing in Rome. However if you are traveling with children and having an extensive stay, you can find affordable items at IKEA to meet your needs. It is basically the same product assortment so you know you can get almost anything like toys or furniture etc. personally I recommend it if you need a potty, high chair, some toys, for your kids while staying in Rome. You take the A subway line to the end station Anagnina. There you will exit and go across the parking lot and then across the street to the bus stop. I took 047, and the first stop was where I had to get off. Torre di Mezzavia was the name of the bus stop. From there you just walk around the complex to get to the Ikea. When you leave IKEA, just follow the sign to the Bus stop (not very detailed signage) but go in the direction the sign points you and then follow the exit to the street and you will run right into the bus stop. Various bus lines stop there and I believe they all go to Anagnina and it is the next stop. I took 505.