I have not travelled while having chemo but sounds like something you need to discuss with your oncologist as you would need their support. Where are you having your treatment? If it is through somewhere like icon they have centres around Australia so it may be possible.
The only issue for you is how you respond to chemo. Some people are ok. I was mostly ok but a few rounds were very hard and my side effects required my oncologist help to manage them. Hence talk to your oncologist about this. Best wishes for your treatment.