For London-Montreal flights, you can use City Airport, Gatwick Airport, Heathrow Airport, Luton Airport, Stansted Airport, Windsor and Eton Central Railway Railway Station, Euston Railway Station, King's Cross Railway Station, Paddington Railway Station, St Pancras Railway Station, Tottenham Hale station Railway Station, Victoria station Railway Station, Waterloo International Railway Station as departure airport, and Montreal Mirabel Intl. - Montreal Intl. Airport, Montreal Trudeau Intl. Airport, Montreal Saint Hubert Longueuil Airport, Dorval Airport for arrival.