An Open Jaw flight ticket is one where you fly into one city, travel overland and fly out from another city.
Are Open Jaw flights more expensive than normal return flights?
No, as long as the same airline flies that route then it's normally a similar price.
Where can I book an Open Jaw flight?
British Airways have lots of open jaw tickets in America, Africa, Europe, Asia and Australia
Expedia offers cheap open jaw tickets online. Go to the 'Multiple destinations' option.
Lastminute.com offers great open jaw options as well as multiple destination tickets
What is an example of an Open Jaw flight?
Typcial open jaw flights are:
London, fly to Los Angeles, drive to San Francisco, fly to London
Or,
London, fly to Cape Town, drive to Durban, fly to London
Open jaw and multi stop flights in Asia
It is quite common to book multistop or open jaw tickets in South East Asia. Cathay Pacific and Singapore Airlines are good options and you can check prices and book online.