Cheap flights from London to San José from £298

The cheapest month to fly to San José from London is in May. Flight prices, which tend to average around £657, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of May, then book flights to San José from London during September instead. Flights to San José in September, while not as cheap as those in May, still average around £677.

The cheapest day to depart from London to San José is on a Monday when prices can be found for as low as £769. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £1,045. 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 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 £880. At midday is when there is more demand to fly to San José, so prices are often more expensive at around £899 per ticket.

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

You are more likely to see cheaper flights to San José from London when booking weeks ahead of your departure date. In general, you can expect to find flights to San José for around £724 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 for as low as £634 on momondo.

There are 3 cabin classes available to choose from on London to San José flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

No. A direct flight is the cheapest option for a flight between London to San José.

As of October 2026, prices for London to San José flights are approximately 5% cheaper when compared to flights at the same time last year.

Avianca, JetBlue, and Air Transat are the most popular carriers operating from London 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 according to our data. United Airlines is the first choice among our users, with 33% 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.

Historically, on average around 22% of flights between London and San José have experienced a delay on any given week. The average delay length over the past 12 months has been 146 minutes.

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

Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Tuesday 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 22% of their flights experiencing any sort of delay.

Bogotá (BOG) was the most common stop: 17% of momondo users choosing one-stop flights on this route connected there.

Flights via Montreal (YUL) offer the lowest average return price of £587.

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 13h 20m.

Denver (DEN) has the shortest average stopover time for this route: 1h 16m.