[KingHual]

Code:

public OnPlayerCommandText(playerid, cmdtext[])
{
	if (strcmp("/islandairport", cmdtext, true, 14) == 0)
	{
 		SetPlayerPos(playerid, 3484.4885,-751.6512,4.4455);// @ teleport islandairport
   		SendClientMessage(playerid, COLOR_RED,"You have been teleported to islandairport");
   		return 1;
	}
	return 1;
}

If that doesn't work, make sure you're typing the command correctly in SA:MP.