Heathrow Airport has 4 Major Terminals the airlines that fly from each one are as follows.

Terminal 1
Aer Lingus - (0645) 737 747
Alliance - (0845) 307 7777
British Airways - (0345) 222 111
British Midland - (0345) 554 554
Cyprus Airways - (020) 8745 7321
El Al Israel - (020) 7957 4100
Finnair - (020) 7408 1222
GB Airways - (0990) 444 000
Icelandair - (020) 8745 4860
LOT Polish Airlines - (020) 8750 4096
Manx Airlines - (020) 8745 7321
Sabena - (0345) 581 291
South African Airways - (020) 7745 7321
Virgin Express - (0800) 891 199

 

Terminal 2

Terminal 3