Please uncheck any airports you do not want in your selection, and then press the 'Show me how to get from Lhr to Psy' button at the bottom of the screen.

Matches for LHR as three letter airport code or city name

Include	Airport name	Airport code	City	Country
	Heathrow	LHR	London	United Kingdom

Matches for PSY as three letter airport code or city name

Include	Airport name	Airport code	City	Country
	Port Stanley Airport	PSY	Port Stanley	Falkland Islands (Islas Malvinas)