Cheap flights from Buenos Aires to London from $590

The cheapest month to fly to London from Buenos Aires is in February. Flight prices, which tend to average around $1,331, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Buenos Aires averaging around $1,363.

You are more likely to see cheaper flights to London from Buenos Aires when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $1,678 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Buenos Aires for as low as $1,332 on momondo.

You could potentially save up to 17% on your flight if you consider stops on a Buenos Aires to London flight.

As of March 2026, prices for Buenos Aires to London flights are approximately 19% cheaper when compared to flights at the same time last year.

United Airlines, Turkish Airlines, and ITA Airways are the most popular carriers operating from Buenos Aires to London

British Airways, Iberia and Lufthansa are the top three most popular airlines that fly to London from Buenos Aires according to our data. British Airways is the first choice among our users, with 44% of people opting to fly with this airline when traveling to London. Keep in mind that there are 3 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

Historically, on average around 40% of flights between Buenos Aires and London have experienced a delay on any given week. The average delay length over the past 12 months has been 139 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Sao Paulo (GRU) was the most common stop: 37% of momondo users choosing 1-stop flights on this route connected there.

Flights via Mexico City (MEX) offer the lowest average round-trip price of $1,190.

Flights connecting via Rio de Janeiro (GIG) have the shortest average one-way travel time: 15h 48m.

Frankfurt am Main (FRA) has the shortest average layover time for this route: 1h 05m.

2 flights are operational daily from Buenos Aires to London as of March 2026. The most popular departure time for this route is 1:00PM, with 100% of flights per day taking off in the afternoon.

14 flights are operational weekly from Buenos Aires to London as of March 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.