Cheap flights from Santiago to London from $324

The month of March is, on average, the cheapest month to fly to London Heathrow Airport from Santiago, with most prices found around $944. If you’re not able to fly to London Heathrow Airport in March, then November is your next best option. Flight prices from Santiago to London Heathrow Airport during November average around $1,057.

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $1,183. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,439.

According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from Santiago to London Heathrow Airport at noon for as low as $1,299. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $1,960.

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 $1,226 when searching weeks out. 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 $1,031 on momondo.

There are 3 cabin classes available to choose from on Santiago to London Heathrow Airport 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 66% on your flight if you consider stops on a Santiago to London Heathrow Airport flight.

As of August 2026, prices for Santiago to London Heathrow Airport flights are approximately 30% more expensive when compared to flights at the same time last year.

KLM is the most popular carrier operating from Santiago Arturo Merino Benitez to London Heathrow

Iberia, British Airways and LATAM Airlines 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 38% of people opting to fly with this airline when traveling 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 8% 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 204 minutes.

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

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

According to our data, British Airways have had the least number of delays on this route over the last 12 months; with about 8% of their flights experiencing any sort of delay.

Sao Paulo (GRU) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Bogotá (BOG) offer the lowest average round-trip price of $949.

Flights connecting via Sao Paulo (GRU) have the shortest average one-way travel time: 17h 25m.

Sao Paulo (GRU) has the shortest average layover time for this route: 2h 23m.