Cheap flights from Santiago to London from £321

The cheapest month to fly to London from Santiago is in November. Flight prices, which tend to average around £680, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Santiago averaging around £687.

Our data shows that Sunday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £852. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Santiago to London for around £1,111.

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £889. Flights in the morning are often more expensive, with an average ticket price of £1,078.

Fly from Santiago Arturo Merino Benitez to London Heathrow for the best Santiago Arturo Merino Benitez - London flight prices

You are more likely to see cheaper flights to London from Santiago when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £875 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 Santiago for as low as £751 on momondo.

There are 3 cabin classes available to choose from on Santiago Arturo Merino Benitez 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 37% on your flight if you consider stops on a Santiago to London flight.

As of March 2026, prices for Santiago to London flights are approximately 18% more expensive when compared to flights at the same time last year.

British Airways and KLM are the most popular carriers operating from Santiago Arturo Merino Benitez to London

Iberia, LATAM Airlines and British Airways are the top three most popular airlines that fly to London from Santiago according to our data. Iberia is the first choice among our users, with 37% of people opting to fly with this airline when travelling 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 9% of flights between Santiago and London have experienced a delay on any given week. The average delay length over the past 12 months has been 68 minutes.

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

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

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

Madrid (MAD) was the most common stop: 56% of momondo users choosing one-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average return price of £612.

Flights connecting via Madrid (MAD) have the shortest average one-way travel time: 17h 08m.

Madrid (MAD) has the shortest average stopover time for this route: 1h 53m.

1 flights are operational daily from Santiago 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.

9 flights are operational weekly from Santiago to London as of March 2026. The most popular departure day for this route is Tue, with 33% of flights per week taking off on this day.