After wiring the money the victim waits at the airport patiently with a bunch of flowers for his/her love of their life to arrive.
In order to avoid these scams never send money for any travel related expense, instead make it clear that you will travel to meet them AFTER you have spent considerable time chatting to them for many months.
Also, make it clear that you will never send any money to anyone you meet online.
They will then suggest that you send them the money so they can purchase a plane ticket.
Shortly later they will tell you they need additional money for a passport, visa fees, transportation to the airport and miscellaneous expenses.
Typically this will be followed by a request for another small amount of money shortly after the victim sends their initial amount.