Praise be to Allaah.
If your friend is going to
obtain this ticket in a permissible manner, such as if it is given to him by
the airline company without him telling lies, offering a bribe or playing
any tricks, then there is nothing wrong with your accepting it from him.
But if he is going to
obtain it by some haraam means, then you should not accept it; do not help
him in doing something haraam.
And Allaah knows best.