£478 Find Cheap Flights from Puerto Rico to London

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight to London departing on 6/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Puerto Rico to London

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Puerto Rico to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Puerto Rico to London

Wed, 6 Aug - Tue, 27 Jan
JetBlue Logo
06:05 - 06:30SJU-LHR
19h 25m1 stop
JetBlue Logo
07:25 - 00:37LHR-SJU
21h 12m1 stop
£478JetBlue
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Wed, 20 Aug - Sun, 24 Aug
JetBlue Logo
08:50 - 09:35SJU-LGW
19h 45m1 stop
JetBlue Logo
12:10 - 01:31LGW-SJU
18h 21m1 stop
£479JetBlue
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Mon, 4 Aug - Wed, 28 Jan
JetBlue Logo
06:00 - 06:30SJU-LHR
19h 30m1 stop
JetBlue Logo
12:20 - 00:37LHR-SJU
16h 17m1 stop
£489JetBlue
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Wed, 10 Sep - Thu, 18 Sep
American Airlines Logo
16:42 - 12:45SJU-LHR
15h 03m1 stop
American Airlines Logo
06:15 - 18:35LHR-SJU
17h 20m1 stop
£490American Airlines
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Tue, 5 Aug - Tue, 27 Jan
Iberia Logo
06:04 - 09:25SJU-LHR
22h 21m1 stop
Iberia Logo
07:00 - 16:30LHR-SJU
13h 30m1 stop
£491Iberia
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Sun, 9 Nov - Thu, 20 Nov
American Airlines Logo
07:25 - 09:00SJU-LGW
21h 35m2 stops
American Airlines Logo
11:20 - 02:10LGW-SJU
18h 50m2 stops
£495American Airlines
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Mon, 25 Aug - Mon, 8 Sep
Iberia Logo
13:36 - 09:25SJU-LHR
14h 49m1 stop
Iberia Logo
18:45 - 15:05LHR-SJU
25h 20m1 stop
£495Iberia
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Tue, 18 Nov - Wed, 26 Nov
United Airlines Logo
08:30 - 07:10SJU-LHR
18h 40m2 stops
United Airlines Logo
08:30 - 00:36LHR-SJU
20h 06m2 stops
£504United Airlines
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Tue, 18 Nov - Wed, 26 Nov
United Airlines Logo
08:30 - 07:10SJU-LHR
18h 40m2 stops
United Airlines Logo
06:50 - 21:00LHR-SJU
18h 10m2 stops
£506United Airlines
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Thu, 6 Nov - Wed, 19 Nov
Icelandair Logo
06:15 - 10:55SJU-LGW
24h 40m2 stops
Icelandair Logo
11:55 - 01:43LGW-SJU
17h 48m2 stops
£772Icelandair
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KAYAK's insights & trends for flights to London

Get data-powered insights and trends into flights to London to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to London, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights to London is September, where tickets cost £478 on average for return flights. On the other hand, the most expensive months are June and July, where the average cost of tickets from Puerto Rico is £798 and £734 respectively. For one-way flights, the best month to travel is September with an average price of £478.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to London, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Which is the cheapest airport to fly into in London?

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in London is London Stansted Airport (STN), with an average flight price of £75.

Good to know - Cheap tickets from Puerto Rico to London

Low seasonFebruary
High seasonMay
Cheapest flight£175
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly and prices are also 0% lower on average.
Flight from San Juan to London Gatwick Airport

FAQs - booking London flights

  • Which London airport is closest to central London?

    There are 6 major airports in London. The nearest airport from London city centre is London City (8 miles), followed by London Heathrow Airport (14 miles), London Gatwick Airport (24 miles), and London Luton Airport (28 miles).

  • What is the cheapest day to fly to London?

    Based on KAYAK data, the cheapest day to fly to London is Tuesday where round-trip tickets can be as cheap as £464. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are £1,045 on average.

  • How does KAYAK find such low prices on flights to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to London?

    The cheapest time of day to fly to London is generally in the evening, when round-trip flights cost £661 on average. The most expensive time of day to fly to London is generally in the morning, which is peak travel time and where the average cost of a ticket is £1,144.

  • How many direct flights to London are there each week?

    Each week there are around 767 direct flights from within Puerto Rico to London. The most common day for departures is Friday, with 17% of flights taking off on this day.

Top tips for finding cheap flights to London

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest London flight deals.

Top airline flying from Puerto Rico to London

 
See real verified KAYAK customer reviews for airlines flying to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Puerto Rico to London. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.0
IcelandairOverall score based on 499 reviews
8.0Crew
7.1Boarding
7.0Comfort
6.2Food
7.0Entertainment
Airline reviews

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

4.0 OkaySamuel, Jun 2025BWI - KEF
Read more Icelandair reviews

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset. If there is option to use another company, I suggest to other people use them.

I had an exit row and so was Comfortable on the long flight.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

Only serving 2 small coffee in 7.5 hrs flight with very limited choice to order food.

Overall good. I was surprised how easy it was to get from plain to plain in such a short time. Food choices were not so great and quite expensive. Entertainment was ok. Flights were smooth.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Milton Keynes
Eastbourne
Luton
Southend-on-Sea
Winchester
Slough
Croydon
Stansted
Chichester
Folkestone
Maidstone
Colchester
Crawley
Chelmsford
Bedford
Hastings
Watford
Basingstoke
Royal Tunbridge Wells

Everything you need to know for your flight to London

Cabin class types available on flights to London

Cabin classes available on flights to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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