Cheap flights from London Heathrow Airport to San José from £312

The cheapest month to fly to San José from London Heathrow Airport is in September. Flight prices, which tend to average around £623, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to San José from London Heathrow Airport during May instead. Flights to San José in May, while not as cheap as those in September, still average around £644.

The cheapest day to depart from London Heathrow Airport to San José is on a Monday when prices can be found for as low as £766. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £1,059. These prices are subject to change though, so be sure to set up a Price Alert for flights to San José.

Our data shows that the cheapest London Heathrow Airport to San José flights are usually those with departure times in the morning. Our users have found flights to San José in the morning for as low as £875. At midday is when there is more demand to fly to San José, so prices are often more expensive at around £890 per ticket.

Fly from London Heathrow to San José Juan Santamaria Intl for the best London Heathrow - San José Juan Santamaria Intl flight prices

You are more likely to see cheaper flights to San José from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San José for around £725 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San José from London Heathrow Airport for as low as £632 on momondo.

There are 3 cabin classes available to choose from on London Heathrow Airport to San José 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 10% on your flight if you consider stops on a London Heathrow Airport to San José flight.

As of November 2026, prices for London Heathrow Airport to San José flights are approximately 10% cheaper when compared to flights at the same time last year.

Avianca and KLM are the most popular carriers operating from London Heathrow to San José Juan Santamaria Intl

United Airlines, Air Canada and Avianca are the top three most popular airlines that fly to San José from London Heathrow Airport according to our data. United Airlines is the first choice among our users, with 34% of people opting to fly with this airline when travelling to San José. Keep in mind that there are 11 different airlines that fly to San José on a routine basis, so you have a few additional options to choose from.

Houston (IAH) was the most common stop: 22% of momondo users choosing one-stop flights on this route connected there.

Flights via Montreal (YUL) offer the lowest average return price of £585.

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 14h 25m.

Amsterdam (AMS) has the shortest average stopover time for this route: 1h 35m.