Major Airports can be found in London (Heathrow, Gatwick and Stansted), also most major cities have international flight connections (Birmingham, Manchester, Newcastle etc...)

Heathrow Airport
234 Bath Road, Hayes
Middlesex UB3 5AP
Tel: +44 0870 0000 123 (UK)

Gatwick Airport
West Sussex RH6 ONP
United Kingdom
Tel: +44 (0)870 000 2468 (UK)

Stansted Airport
Enterprise House
Bassingbourne Road
Essex CM24 1QW
Tel: +44 (0)870 0000 303 (UK)

Glasgow Airport
Paisley, Renfrewshire
Scotland PA3 2SW
Tel: +44 (0)141 887 1111

Edinburgh Airport
Scotland EH12 9DN
Tel: +44 (0)131 333 1000

Aberdeen Airport
Dyce, Aberdeen
Scotland AB21 7DU
Tel: +44 (0)1224 722331

Southampton Airport
Hampshire SO18 2NL
Tel: +44 (0)23 8062 0021