£201 Find Cheap Flights from Puerto Rico to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Heathrow departing on 5/10. 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, 0 bags

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

 
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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Flight Deals

Cheap Flights from Puerto Rico to Heathrow

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Puerto Rico to Heathrow 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 Heathrow

Fri, 16 Oct - Sat, 31 Oct
Virgin Atlantic Logo
13:06 - 10:20
SJU
-
LHR
16h 14m
1 stop
Virgin Atlantic Logo
08:55 - 21:59
LHR
-
SJU
17h 04m
1 stop
£492Virgin Atlantic
Sun, 20 Sep - Tue, 22 Sep
United Airlines Logo
13:25 - 07:15
SJU
-
LHR
12h 50m
1 stop
United Airlines Logo
06:50 - 23:50
LHR
-
SJU
22h 00m
2 stops
£513United Airlines
Mon, 21 Sep - Wed, 23 Sep
United Airlines Logo
13:25 - 07:15
SJU
-
LHR
12h 50m
1 stop
United Airlines Logo
06:50 - 23:50
LHR
-
SJU
22h 00m
2 stops
£514United Airlines
Sun, 20 Sep - Wed, 23 Sep
United Airlines Logo
01:00 - 10:00
SJU
-
LHR
28h 00m
2 stops
United Airlines Logo
06:50 - 23:50
LHR
-
SJU
22h 00m
2 stops
£516United Airlines
Sat, 19 Sep - Tue, 22 Sep
United Airlines Logo
01:00 - 06:55
SJU
-
LHR
24h 55m
2 stops
United Airlines Logo
06:50 - 23:50
LHR
-
SJU
22h 00m
2 stops
£517United Airlines
Tue, 22 Sep - Thu, 24 Sep
United Airlines Logo
07:00 - 07:55
SJU
-
LHR
19h 55m
1 stop
United Airlines Logo
07:30 - 23:50
LHR
-
SJU
21h 20m
2 stops
£523United Airlines
Sat, 23 May - Fri, 21 Aug
Virgin Atlantic Logo
18:00 - 12:05
SJU
-
LHR
13h 05m
1 stop
Virgin Atlantic Logo
11:45 - 23:59
LHR
-
SJU
17h 14m
1 stop
£527Virgin Atlantic
Wed, 9 Sep - Wed, 23 Sep
Delta Logo
13:26 - 06:45
SJU
-
LHR
12h 19m
1 stop
Delta Logo
06:30 - 23:44
LHR
-
SJU
22h 14m
2 stops
£530Delta
Tue, 22 Sep - Fri, 25 Sep
United Airlines Logo
01:00 - 10:15
SJU
-
LHR
28h 15m
2 stops
United Airlines Logo
10:00 - 15:42
LHR
-
SJU
34h 42m
1 stop
£530United Airlines
Fri, 12 Jun - Fri, 19 Jun
Multiple Airlines Logo
08:46 - 13:30
PSE
-
LHR
23h 44m
2 stops
Multiple Airlines Logo
06:20 - 16:56
LHR
-
PSE
39h 36m
2 stops
£781Multiple Airlines
Booking Insights

KAYAK's insights & trends for flights to Heathrow

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

What is the cheapest flight to London Heathrow Airport?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to London Heathrow Airport was found on the route from San Juan, at £492 return. The most popular connection is from Manchester to London Heathrow Airport and KAYAK users have found return deals for as low as £110 in the last 3 days.

What is the cheapest month to fly to London Heathrow Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to London Heathrow Airport, 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 Heathrow Airport is September, where tickets cost £458 on average for return flights. On the other hand, the most expensive months are July and December, where the average cost of tickets from Puerto Rico is £816 and £783 respectively. For one-way flights, the best month to travel is September with an average price of £458.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to London Heathrow Airport, 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 2 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know - Cheap tickets from Puerto Rico to London Heathrow Airport

Low seasonJanuary
Cheapest flight£201
Best time to beat the crowds (7% less expensive on average)
Most popular time to fly and prices are also 7% lower on average.
Flight from San Juan to London Heathrow Airport

FAQs - booking London Heathrow Airport flights

  • What is the cheapest flight to London Heathrow Airport?

    In the last 3 days, the cheapest flight deal to London Heathrow Airport was found on the route from San Juan, at £492 return. The most popular connection is from Manchester to London Heathrow Airport and KAYAK users have found return deals for as low as £110 in the last 3 days.

  • How far is London Heathrow Airport from central London?

    You’ll need to travel 14 miles to reach the London city centre from London Heathrow Airport.

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

    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 Heathrow Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport 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 Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport 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 Heathrow Airport?

    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 Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

    Each week there are around 1,609 direct flights from within Puerto Rico to London Heathrow Airport. The most common day for departures is Sunday, with 18% of flights taking off on this day.

Top tips for finding cheap flights to London Heathrow Airport

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

Reviews of the top airline flying from Puerto Rico to Heathrow

 
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 Heathrow? 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.
7.1
JetBlueOverall score based on 2968 reviews
6.6Food
7.9Crew
7.5Comfort
7.2Entertainment
7.3Boarding
Airline reviews

Boarding was fast, easy, and we landed early. The entertainment system was very buggy and kept resetting throughout the flight.

8.0 ExcellentChristopher, Apr 2026
LAS - BOS
Read more JetBlue reviews

Boarding was fast, easy, and we landed early. The entertainment system was very buggy and kept resetting throughout the flight.

Boarding was done extremely poorly, with huge crowds gate loiterers blocking people from boarding, multiple lines of people trying to merge into one line. One of the male flight attendants who was doing drink service was not happy about having to let a passenger back to their seat and was unnecessarily sassy about it. I thought he was pretty entitled and not a great ambassador for JetBlue

Flight was smooth, amenities (entertainment options and power outlets) were good, sears decent)

Flight team was very courteous only complaint wS the boarding process and mandatory bag check

My experience with Jet Blue was wonderful. My experience with Kayak sucked and will never use again.

Disaster This is why I stick to delta You get what you pay for

I was especially impressed without efficiently the crew got passengers on and off. One of the stewards was slightly gruff, I thought. No big deal but that's what I noticed.

Worst customer service ever experienced on the planet, dirty plane, no communication, and severe delays

Well, its a hit or miss when boarding most of the time your employees just let everyone enter immediately In one bum rush. Then out of know where tell the passengers only let A can enter then b then c etc. So make a decision and stick to it. Do it by alphabet and have famn strick compliance. Let the public know. That makes easier on passengers.

Qatar does not answer phone calls and communicate with travelers about trip cancellations

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Everything you need to know for your flight to Heathrow

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