Cheap flights from South America to London from £301

The cheapest month to fly to London from South America is in February. Flight prices, which tend to average around £732, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from South America averaging around £741.

Our data shows that Thursday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £842. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from South America to London for around £1,014.

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

You are more likely to see cheaper flights to London from South America when booking weeks ahead of your departure date. In general, you can expect to find flights to London 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 from South America for as low as £744 on momondo.

There are 3 cabin classes available to choose from on South America to London 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 flight.

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

Avianca, LATAM Airlines and British Airways are the top three most popular airlines that fly to London 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. Keep in mind that there are 11 different airlines that fly to London 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 each day. The most common flight departure time for this route is 23:00, with 78% of daily flights taking off in the evening.

As of March 2026, 120 flights take off from South America and land in London each week. The most common flight departure day for this route is Tue, with 16% of weekly flights taking off on this day.