Cheap flights from South America to London from £242

In general, November 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 £755. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from South America averaging around £759.

On average, the least expensive day to fly to London Heathrow Airport from South America is on a Saturday. momondo users have found tickets for Saturday departures for as low as £812. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £865.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from South America to London Heathrow Airport in the evening for as low as £825. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £850 on average. Flights to London Heathrow Airport from South America in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 £814 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 £769 on momondo.

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

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

British Airways, LATAM Airlines and Avianca are the top three most popular airlines that fly to London Heathrow Airport from South America according to our data. British Airways is the first choice among our users, with 40% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 8 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

As of September 2026, 23 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 65% of daily flights taking off in the evening.

As of September 2026, 165 flights take off from South America and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.