If going to HND, it's not a "return" ticket since your destination is not the same as your starting point (NRT). For HND access using trains, you can either just buy single tickets or swipe your IC card to pay. From several locations around the city, you might find it more convenient to take the limobus.
SammyF1oyd, you are right I should have said a one way to Haneda. I have decided to get the three day subway way pass and just purchase a ticket to go to the airport. Thanks for your input.