Cheap flights from London Heathrow to San Juan

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Looking for the price of a flight from London Heathrow to San Juan?

There’s no fixed price — fares between London and San Juan can vary a lot by day or time.

Select your dates to check current offers.

It’s often useful to check whether nearby airports offer better fares. Flying during less crowded periods also increases your chances of finding good deals.

Flying from or to London and San Juan? Here are your airport options

Knowing your full list of nearby airports can make flight planning easier, especially when routes vary.

  • Airports in London: You have 6 departure options - City Airport, Gatwick, Heathrow, Luton, Southend, Stansted.
  • Airports in San Juan: Isla Grande is a secondary arrival airport.

For families or those traveling with assistance, smaller airports can be easier to navigate. Cities served by multiple airports often allow for more flexible travel planning.

Flights from London - Heathrow to San Juan - Luis Muñoz Marín

Explore flights from London Heathrow to San Juan your way

On Jetcost, you can filter by round-trip or one-way, time of day, airline, number of stops, and even by specific travel agency.

Other popular destinations

Also interested in Puerto Rico? Check out: Aguadilla, Culebra Airport, Ponce, San Juan, Vieques Airport.

If you’re flexible with dates, try checking the days before and after to see if prices vary. Some routes are offered by multiple agencies — comparing fares can really pay off.
Frequently Asked Questions

Frequently asked questions about flights from London Heathrow to San Juan.

How much does an airline ticket from London Heathrow to San Juan cost?

Flight prices can vary a lot depending on the period and destination. At the moment, this information is not available for flights from London Heathrow to San Juan.

How far is London from San Juan?

London is about 6730 km from San Juan.

What are the airports in San Juan?

San Juan has another airport: Isla Grande.

What are the airports in London?

London has 6 airports: City Airport, Gatwick, Heathrow, Luton, Southend, Stansted.

What are the most popular cities in Puerto Rico?

The most popular cities in Puerto Rico according to our users' searches are: Aguadilla, Culebra Airport, Ponce, San Juan, Vieques Airport.

When should I book a flight from London to San Juan?

The best time to book a flight from London to San Juan is 10 months in advance, while the worst time is 10 weeks in advance.

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

This information is not available at the moment.

What is the most expensive month to fly from London to San Juan?

This information is not available at the moment.

What is the best day of the week to fly from London to San Juan?

This information is not available at the moment.