Cheap flights from Santiago to London from $436

The cheapest month to fly to London from Santiago is in February. Flight prices, which tend to average around $975, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Santiago averaging around $1,005.

The cheapest day to depart from Santiago to London is on a Tuesday. Travelers who choose to depart for London on a Tuesday will often find tickets for as low as $1,279. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $1,960. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from Santiago in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,368 when looking at flights departing in the afternoon. Flights to London are more costly at noon, with an average ticket price of $1,406. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,272 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Santiago for as low as $1,075 on momondo.

There are 4 cabin classes available to choose from on Santiago 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 61% on your flight if you consider stops on a Santiago to London flight.

As of November 2026, prices for Santiago to London flights are approximately 3% more expensive when compared to flights at the same time last year.

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 202 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 8% of their flights experiencing any sort of delay.

Madrid (MAD) was the most common stop: 67% 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 Paris (CDG) have the shortest average one-way travel time: 16h 45m.

Paris (CDG) has the shortest average layover time for this route: 1h 23m.