Cheap flights from Buenos Aires to London from £423

The cheapest month to fly to London from Buenos Aires is in February. Flight prices, which tend to average around £996, 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 £1,005.

Fly from Buenos Aires Ministro Pistarini to London Heathrow for the best Buenos Aires - London flight prices

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 £1,237 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 Buenos Aires for as low as £996 on momondo.

There are 2 cabin classes available to choose from on Buenos Aires 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 30% 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.

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 departing at night have, in the past, seen delays more frequently in comparison.

Sao Paulo (GRU) was the most common stop: 33% of momondo users choosing one-stop flights on this route connected there.

Flights via Sao Paulo (GRU) offer the lowest average return price of £734.

Flights connecting via Madrid (MAD) have the shortest average one-way travel time: 15h 05m.

Madrid (MAD) has the shortest average stopover time for this route: 0h 52m.

2 flights are operational daily from Buenos Aires to London as of March 2026. The most popular departure time for this route is 13:00, with 100% of flights per day taking off in the afternoon.

The number of flights available between Buenos Aires and London is 14 per week as of March 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.