Cheap flights from Santiago to London from $322

The month of March is, on average, the cheapest month to fly to London Heathrow Airport from Santiago, with most prices found around $951. If you’re not able to fly to London Heathrow Airport in March, then February is your next best option. Flight prices from Santiago to London Heathrow Airport during February average around $1,071.

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 Thursday, with ticket prices averaging around $1,469.

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 $1,284. 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 afternoon are often more expensive with an average ticket price of $1,328.

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 $1,240 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 $1,044 on momondo.

There are 4 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 61% on your flight if you consider stops on a Santiago to London Heathrow Airport flight.

As of September 2026, prices for Santiago to London Heathrow Airport flights are approximately 19% more expensive when compared to flights at the same time last year.

LEVEL and Avianca 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 43% 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 7% 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 209 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.

Tuesday 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 7% of their flights experiencing any sort of delay.

1 flights are operational daily from Santiago to London Heathrow Airport as of September 2026. The most popular departure time for this route is 4:00PM, with 100% of flights per day taking off in the afternoon.

As of September 2026, there are 9 flights per week flying from Santiago to London Heathrow Airport. The most common day of the week flights depart is Tue, with 33% of flights taking off on this day.