Cheap flights from Santiago to London from £377

In general, March is the cheapest month to fly from Santiago to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £687. The month of November is another great option to travel to London Heathrow Airport, with average flight prices from Santiago averaging around £750.

On average, the least expensive day to fly to London Heathrow Airport from Santiago is on a Sunday. momondo users have found tickets for Sunday departures for as low as £859. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £1,121.

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from Santiago to London Heathrow Airport at midday for as low as £897. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £1,121 on average. Flights to London Heathrow Airport from Santiago in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport from Santiago when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £883 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Santiago for as low as £758 on momondo.

There are 3 cabin classes available to choose from on Santiago Arturo Merino Benitez to London Heathrow 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 Heathrow Airport flight.

As of March 2026, prices for Santiago to London Heathrow Airport flights are approximately 1% cheaper when compared to flights at the same time last year.

British Airways, Avianca, and LEVEL are the most popular carriers operating from Santiago Arturo Merino Benitez to London Heathrow

Iberia, LATAM Airlines and British Airways are the top three most popular airlines that fly to London Heathrow Airport 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 Heathrow Airport. Keep in mind that there are 3 different airlines that fly to London Heathrow Airport 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: 40% of momondo users choosing one-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average return price of £618.

Flights connecting via Paris (CDG) have the shortest average one-way travel time: 16h 45m.

Paris (CDG) has the shortest average stopover time for this route: 1h 25m.