Cheap flights from Santiago to Buenos Aires from £43

In general, May is the cheapest month to fly from Santiago to Buenos Aires. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £126. If you don’t want to visit Buenos Aires in May, then you should wait until March to fly from Santiago, when ticket prices are also cheap, with an average price of £127.

The cheapest day to depart on your flight to Buenos Aires is on a Friday when prices can be found for as low as £152. This is often the case because there is less demand to fly during this day of the week. On the other hand, Tuesday is the most expensive day to depart from Santiago because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £304.

Our most recent data shows that the best time of day to fly to Buenos Aires is in the afternoon. Flights from Santiago to Buenos Aires during this time can be as low as £117. Flights to Buenos Aires are more costly in the morning, with an average ticket price of £220. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Santiago Arturo Merino Benitez to Buenos Aires Jorge Newbery for the best Santiago Arturo Merino Benitez - Buenos Aires flight prices

You are more likely to see cheaper flights to Buenos Aires from Santiago when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around £175 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from Santiago for as low as £152 on momondo.

There are 3 cabin classes available to choose from on Santiago to Buenos Aires flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 10% of flights between Santiago and Buenos Aires have experienced a delay on any given week. The average delay length over the past 12 months has been 111 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, Sky Airline have had the fewest delays on this route over the last 12 months, with about 6% of their flights experiencing any sort of delay.

As of October 2026, there are 9 flights per day flying from Santiago to Buenos Aires. The most common time of day flights depart is 10:00, with 45% of flights taking off at midday.

As of October 2026, there are 66 flights per week flying from Santiago to Buenos Aires. The most common day of the week flights depart is Fri, with 35% of flights taking off on this day.