The various types of flight tickets are:
One-way ticket: This allows you to travel from one country to another without returning.(For example, you board your flight from Australia to Singapore without returning to Australia).
Return ticket/Round trip ticket: It enables you to travel to another destination and return to your original starting point. (For example, you can travel from India to Paris and back to India).
Onward ticket: With this ticket, you can travel further from your present destination to another one and not back to the place you originally started from. (For example, you can travel from Dubai to Germany and then to France).