Follow the steps 1-3 above to receive quotes for the destinations required from every site e.g. Sydney to Seattle
Then repeat the steps 1-3 again, with the following changes:move
Create a first quote to travel from Sydney to Honolulu (return)
Create a second quote to travel from Honolulu to any US domestic destination required
e.g. Honolulu to Seattle
Add the two quotes together to receive a final quote
Compare the quotes generated from points A and B and select the cheapest one.