That was 2 weeks ago when I posted it I had checked the prices that evening but it might have changed by now (I booked my return flight date 6-12 months later so that might result in cheaper flights as well)
compared to a one way ticket, a return ticket only costs a little more and might be worth it if it saves you problems at the airport or you need to return early for whatever reason. The airlines are pretty large when it comes to changing flights at the moment