Many times I read this question
@Colin *****
. A return ticket is not much more expensive than a one way. Many times you can ask a refund on the return part if you not use it. Had a return ticket with EVA Air which was about 50⏠more expensive than a one way. I was almost sure I did not use the return trip because I wanted to stay in Thailand permanent. Asked the refund, and they gave me 150⏠back. So at the end, the total was 100⏠cheaper than I had bought a one way ticket in the first place. Ask the refund policy of your flight company !