I am looking at planning a trip next year to visit friends in Sarajevo and on to Dublin on my own. I have a couple of options on how to get there. Option 1 30,00 United miles in the back of the plane from IAD to SJJ. I would then either pay for a flight to Dublin or pay for a flight SJJ to Zagreb then use AA miles from Zagreb to DUB (with fuel surcharges of approx $134). Then 25,000 Avios (plus fuel surcharge) for Aer Lingus business class from DUB to BOS and SW points home. Is Aer Lingus business worth 25,000 Avios for a just over 6 hour flight ? I could also reverse this trip but would have to do an overnight in London. I do not want to do a 60,000 United round trip as I need United miles for another trip. Option 2 24,000 Avios BOS to DUB and pay for a round trip between DUB and SJJ. This would probably involve an overnight in Germany or Istanbul. I would pay cash or use SW points to get to BOS and back home. I will have limited Avios and AA miles. I am not a manufactured spend person also so earning a ton of new miles is really an option.