Cheap flights from London Heathrow Airport to South America from £371

In general, September is the cheapest month to fly from London Heathrow Airport to South America. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £795. If you are unable to visit South America during the month of September, then departing from London Heathrow Airport during the month March is also very affordable. Most momondo users find prices during this month for around £808.

Our data shows that Monday is the least expensive day to fly to South America. Tickets to fly out on this day can be as low as £761. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to South America for around £874.

Fly from London Heathrow to Bogotá El Dorado for the best London Heathrow - South America flight prices

You are more likely to see cheaper flights to South America from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to South America for around £774 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South America from London Heathrow Airport for as low as £680 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to South America flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 21% on your flight if you consider stops on a London Heathrow Airport to South America flight.

Avianca, KLM, and Lufthansa are the most popular carriers operating from London Heathrow to South America

Avianca, British Airways and LATAM Airlines are the top three most popular airlines that fly to South America from London Heathrow Airport according to our data. Avianca is the first choice among our users, with 40% of people opting to fly with this airline when travelling to South America. Keep in mind that there are 17 different airlines that fly to South America on a routine basis, so you have a few additional options to choose from.

As of June 2026, 25 flights take off from London Heathrow Airport and land in South America each day. The most common flight departure time for this route is 21:00, with 100% of daily flights taking off in the evening.

As of June 2026, 178 flights take off from London Heathrow Airport and land in South America each week. The most common flight departure day for this route is Sat, with 16% of weekly flights taking off on this day.