Cheap flights from London Heathrow to San Juan Puerto Rico from £494

Q: How much are flights normally?

£ 576. If you see flights from London Heathrow to San Juan Puerto Rico for less than this, you've found a good deal.

Q: When is the best time to book cheap flights?

8 weeks. If you want cheap flights from London Heathrow to San Juan Puerto Rico, this is the best time to book.

Q: What are the cheapest airlines?

JetBlue. These airlines usually offer the cheapest flights from London Heathrow to San Juan Puerto Rico.

Q: What airlines fly indirectly?

British Airways, Virgin Atlantic, JetBlue, Iberia Airlines, Lufthansa. These airlines fly from London Heathrow to San Juan Puerto Rico, but you’ll have at least one layover.

Q: When is high season?

April. This is the most expensive time to fly to San Juan Puerto Rico. If this is when you want to go, book your flight from London Heathrow in advance.

Q: When is the cheapest time to fly?

June. Flights from London Heathrow to San Juan Puerto Rico are usually cheaper at this time of year.

Q: How long is the flight?

11 hrs. This is the shortest flight time from London Heathrow to San Juan Puerto Rico.

Q: How long should I stay in San Juan Puerto Rico?

8 days. Most people spend this amount of time in San Juan Puerto Rico.

from as little as £494

8 nights in San Juan Puerto Rico, departing London Heathrow on 28 / Oct / 2025 with JetBlue (price found 23 hours ago)

Subject to availability, prices correct of the last 24 hours

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Cheap return flights from London Heathrow to San Juan Puerto Rico

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All prices shown are per person based on return flights only. Prices found in the last 48 hours.

The London Heathrow / San Juan Puerto Rico route

All 6735 km of it

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San Juan Puerto Rico flight facts

What you need to know

How much are flights normally?

£ 576

If you see flights from London Heathrow to San Juan Puerto Rico for less than this, you've found a good deal.

When is the best time to book cheap flights?

8 weeks

If you want cheap flights from London Heathrow to San Juan Puerto Rico, this is the best time to book.

What are the cheapest airlines?

JetBlue

These airlines usually offer the cheapest flights from London Heathrow to San Juan Puerto Rico.

What airlines fly indirectly?

British Airways
Virgin Atlantic
JetBlue
Iberia Airlines
Lufthansa

These airlines fly from London Heathrow to San Juan Puerto Rico, but you’ll have at least one layover.

When is high season?

April

This is the most expensive time to fly to San Juan Puerto Rico. If this is when you want to go, book your flight from London Heathrow in advance.

When is the cheapest time to fly?

June

Flights from London Heathrow to San Juan Puerto Rico are usually cheaper at this time of year.

How long is the flight?

11 hrs

This is the shortest flight time from London Heathrow to San Juan Puerto Rico.

How long should I stay in San Juan Puerto Rico?

8 days

Most people spend this amount of time in San Juan Puerto Rico.

Alternative flights from the UK to San Juan Puerto Rico

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London to San Juan Puerto Rico

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London Luton to San Juan Puerto Rico

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Today alone, Netflights has searched over 1,141 flights. 28 / Oct / 2025 is currently the lowest priced day of the year to fly the London Heathrow/San Juan Puerto Rico route. There are around 135 flights on any given week from the UK to San Juan Puerto Rico and the cheapest month to fly right now is October.

Not suitable? Try running another search or viewing all cheap flight deals.

Min / Max Temperature (°C)

LOWEST

21 °C

AVG

26 °C

HIGHEST

30 °C

Rainfall (mm)

LOWEST

69 mm

AVG

125.7 mm

HIGHEST

158 mm

Key facts about San Juan Puerto Rico

Timezone

4 hrs behind GMT

How to get cheap flights from London Heathrow to San Juan Puerto Rico

Tips and advice from our flight experts

If you're looking to fly from London Heathrow to San Juan Puerto Rico, you might like to know that 28 / Oct / 2025 currently has the cheapest flights. At the moment, there are six airlines flying to San Juan Puerto Rico. Go through the results to find the right flights for you – you can adjust the filters to see find even more flights to San Juan Puerto Rico.

The most popular airlines offering flights to San Juan Puerto Rico are British Airways, Virgin Atlantic & JetBlue. British Airways is the most popular one, but that doesn’t mean their flights will be the cheapest. If you can't find a flight time that suits you, why not look at flying out from a different airport?

Generally speaking, the flight from London Heathrow to San Juan Puerto Rico takes around 13 hrs 25 mins. The fastest flight takes 11 hrs to cover the 6735 km distance. You can view all flight times yourself in the results list.

The cheapest month to fly to San Juan Puerto Rico is June, while April is when the prices of flights, hotels and car hire will be at their highest. If you need somewhere to stay for your trip to Puerto Rico, take a look at our accommodation options.