Question 1

What are the cheapest airlines flying from London to San Juan round-trip?

Accepted Answer

Cheapflights users have booked flights from London to San Juan round-trip from £481. Other airlines that can offer you cheap pricing are JetBlue, from £495, and TAP AIR PORTUGAL, from £601. Icelandair is priced at 28% lower than the current average price of a flight leaving 3 months from now.

Question 2

What are the cheapest airlines to fly from London to San Juan one-way?

Accepted Answer

The cheapet airlines for a one-way flight from London to San Juan are Icelandair (£358), JetBlue (£514), and Avianca (£536).

Question 3

How far ahead should I book a flight from London to San Juan?

Accepted Answer

Booking 89 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 4

What is the cheapest month to book a flight from London to San Juan?

Accepted Answer

Currently, April is the cheapest month in which you can book a flight from London to San Juan (average of £631). Flying from London to San Juan in July is currently the most expensive (average of £1,027). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 5

What is the cheapest day to fly from London to San Juan?

Accepted Answer

Travellers seeking maximum savings on their London to San Juan flight should consider departing on Monday mornings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

E

Accepted Answer

In terms of precipitation, rainfall in San Juan ranges from 55.0 - 156.0 inches per month. November is typically the wettest month, when rainfall can reach 156.0 mm. March is typically the driest time to visit San Juan when rainfall is around 55.0 mm.

Question 7

E

Accepted Answer

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 25.0 C).

Question 8

What are the most popular routes from London to San Juan?

Accepted Answer

The most popular route from London to San Juan is London Heathrow - San Juan Luis Munoz Marin Intl. You may also consider London Gatwick - San Juan Luis Munoz Marin Intl or London City - San Juan Luis Munoz Marin Intl.

Question 9

What are the most popular airlines that fly from London to San Juan?

Accepted Answer

When booking a flight from London to San Juan, you may want to consider flying on Finnair, JetBlue or British Airways as they are the most popular for this route.

Question 10

Where are the most common stopover locations when flying from London to San Juan?

Accepted Answer

The most popular stopover on flights from London to San Juan is Madrid.

Question 11

Where are the least popular stopover locations for London to San Juan flights?

Accepted Answer

London to San Juan flights that have stopovers will least frequently stop in New York.

Question 12

What are some popular things to do or see while on a stopover in Madrid?

Accepted Answer

Spain Building, Puerta del Sol, and Plaza Mayor are the most popular attractions in Madrid if you're in need of something to do during your stopover. Spain Building, Puerta del Sol and Plaza Mayor are located about 8.5 mi, 8.4 mi, and 8.6 mi, respectively from Madrid Barajas if you are interested in checking them out. Those on a stopover in Madrid in need of a car hire can book one at Madrid Barajas for about £26.

Question 13

What is the cheapest day to fly round-trip from London to San Juan?

Accepted Answer

Flying to your destination on a Friday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to San Juan. Check prices with Cheapflights to find a great deal for your trip.

Question 14

How far in advance should I book a flight from London to San Juan?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 57 days in advance, which can save you up to 59% on flights from London to San Juan compared to booking the week you need them. Waiting 57 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £480. For sooner than that we have options available in the next 3 days from £787.

Question 15

What is the cheapest month to fly from London to San Juan?

Accepted Answer

September is one of the best times of the year to fly to San Juan from London. Prices for September average £671 per person but you can even find prices for as low as £439. The most expensive prices can be found in the month of July. Opting for a September flight can save you 41% on your journey compared to booking in July

Question 16

What is the cheapest time of day to fly from LON to SJU?

Accepted Answer

It’s optimal to fly from London to San Juan in the morning. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight in the afternoon.

Question 17

Can I find deals for flights from London to San Juan that include hotel bookings?

Accepted Answer

Yes. In addition to deals on London to San Juan flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 18

How can I find direct flights from London to San Juan?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to San Juan.

Question 19

Can I find deals for business class flights from London to San Juan?

Accepted Answer

Yes. Cheapflights offers flight deals from London to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 20

How does Cheapflights help users find flights from London to San Juan?

Accepted Answer

Cheapflights helps you search for flights from London to San Juan via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Question 21

Why should you use Cheapflights to find cheap flight tickets from London to San Juan?

Accepted Answer

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from London to San Juan.

Question 22

Can Cheapflights find flights from London to San Juan with no change fees?

Accepted Answer

Yes, we can. To see specific flights from London to San Juan with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Question 23

Can Cheapflights notify me if prices for flights from London to San Juan become cheaper?

Accepted Answer

Not ready to book yet? You can track prices for flights from London to San Juan on Cheapflights with our Price Alert feature and get notified when better prices are available.

Round-trip from	£481
One-way from	£243
Popular in	July
Cheapest in	September
Average price	£949

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£358	Average£1,124	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
JetBlue	Cheapest£417	Average£609	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Icelandair	Cheapest£423	Average£640	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Finnair	Cheapest£429	Average£558	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Iberia	Cheapest£511	Average£804	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£537	Average£693	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

Cheap flights from London to San Juan from £243

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from London to San Juan are usually found in September or November, booked 89 days in advance, depart on a Monday or Tuesday and return on a Wednesday

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Cheapest flights from London to San JuanExplore the most affordable flight options available from London to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.

Explore the most affordable flight options available from London to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.

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Best time to book a flight from London to San Juan

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Cheapflights Insights

Everything you need to know about your flight from London to San Juan

How far ahead should I book a flight from London to San Juan?

Use this chart to determine the optimal time to book a return flight from London to San Juan. Price data was last updated on 11 July 2025.

What is the cheapest month to book a flight from London to San Juan?

What is the cheapest time of day to fly from LON to SJU?

Find hourly flight availability from London to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 July 2025.

How much does it cost for a return flight from London to San Juan?

Reviews of airlines servicing San Juan

Read through reviews of airlines operating flights from London to San Juan, such as Delta, United Airlines, andJetBlue. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from London to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from London to San Juan round-trip?

What are the cheapest airlines to fly from London to San Juan one-way?

What are the most popular routes from London to San Juan?

Where are the most common stopover locations when flying from London to San Juan?

What are some popular things to do or see while on a stopover in Madrid?

Where are the least popular stopover locations for London to San Juan flights?

Can I find deals for flights from London to San Juan that include hotel bookings?

How can I find direct flights from London to San Juan?

Can I find deals for business class flights from London to San Juan?

What is the cheapest month to book a flight from London to San Juan?

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Alternative routes for London to San Juan

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Top 6 airlines flying from London to San Juan

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How does Cheapflights help users find flights from London to San Juan?

Why should you use Cheapflights to find cheap flight tickets from London to San Juan?

Can Cheapflights find flights from London to San Juan with no change fees?

Can Cheapflights notify me if prices for flights from London to San Juan become cheaper?

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Cheapest flights from London to San Juan
Explore the most affordable flight options available from London to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.