Cheap flights from South America to London from £301

In general, February is the cheapest month to fly from South America to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £719. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from South America averaging around £746.

On average, the least expensive day to fly to London Heathrow Airport from South America is on a Thursday. momondo users have found tickets for Thursday departures for as low as £842. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £1,014.

Fly from Sao Paulo Guarulhos Intl to London Heathrow for the best South America - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from South America when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £834 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from South America for as low as £744 on momondo.

There are 3 cabin classes available to choose from on South America to London Heathrow 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 14% on your flight if you consider stops on a South America to London Heathrow Airport flight.

British Airways, ITA Airways, and United Airlines are the most popular carriers operating from South America to London Heathrow

Avianca, LATAM Airlines and British Airways are the top three most popular airlines that fly to London Heathrow Airport from South America according to our data. Avianca is the first choice among our users, with 34% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 10 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

As of March 2026, 17 flights take off from South America and land in London Heathrow Airport each day. The most common flight departure time for this route is 23:00, with 74% of daily flights taking off in the evening.

As of March 2026, 124 flights take off from South America and land in London Heathrow Airport each week. The most common flight departure day for this route is Tue, with 22% of weekly flights taking off on this day.