Italy Travel Map Can You Help Me Map Out My Travel Plan?

Can you help me map out my travel plan? - italy travel map

I am planning a trip around the world, but I make sure I'm going in a direction to reduce costs. I have to find out problems that should go in what order I

These are the places to visit:

SF to ...
London
Ireland
Koh Tao
Bangkok
Laos
New Zealand
Nepal
Italy
Sweden
France
Germany
Netherlands
Norway
NY

Do you know where the cheapest places to buy a ticket for them?