When traveling from London to Rio de Janeiro, there are typically alternate options for departure airport, arrival airport, or both. The most popular airport is Rio de Janeiro–Galeão Intl, but for some, Rio de Janeiro Santos Dumont is the better option as it is closer to the end destination or even cheaper to fly into on Lufthansa. If you are looking for alternative departure airport to London Heathrow, consider flying out of London Gatwick which also offers Lufthansa flights.