Upvote:3
Kiwi.com's "Nomad" tool is useful if you're flexible on the order you visit your destinations. It will find the cheapest oder to visit the cities in.
Upvote:6
You can do that through Google Flights in the following way:
Then choose Multi-City
Then add your desired flight segments. You can add more segments by clicking the "Add Flight" Button
Pressing search will guide you through the booking process. If possible, google will try to make everything in one booking. If not, it splits up the tickets and provides you the links for booking.