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Cheap flights from Puerto Rico to London Heathrow Airport from £228

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 29/7. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
10 mar. — 17 mar.1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Puerto Rico to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Puerto Rico to Heathrow
Explore the most affordable flight options available from Puerto Rico to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 febrero 2026.

mar. 10/307:05
SJU
-
LHR
1 stop19h 35m
United Airlines
mar. 17/306:50
LHR
-
SJU
2 stops33h 27m
United Airlines
Deal found 8/2£424
lun. 4/507:40
SJU
-
LHR
1 stop18h 05m
United Airlines
mié. 13/506:50
LHR
-
SJU
2 stops19h 34m
United Airlines
Deal found 6/2£437
mié. 22/407:40
SJU
-
LHR
1 stop18h 05m
United Airlines
mié. 29/407:30
LHR
-
SJU
2 stops18h 54m
United Airlines
Deal found 8/2£438
lun. 9/314:44
SJU
-
LHR
1 stop14h 16m
KLM
vie. 20/315:50
LHR
-
SJU
1 stop22h 55m
KLM
Deal found 7/2£438
jue. 26/212:15
SJU
-
LHR
1 stop14h 40m
JetBlue
mié. 11/312:20
LHR
-
SJU
1 stop18h 34m
JetBlue
Deal found 8/2£440
jue. 19/313:14
SJU
-
LHR
1 stop13h 36m
KLM
mar. 24/312:40
LHR
-
SJU
1 stop15h 19m
KLM
Deal found 7/2£445
jue. 5/313:44
SJU
-
LHR
1 stop15h 46m
JetBlue
lun. 9/308:05
LHR
-
SJU
1 stop14h 48m
JetBlue
Deal found 6/2£447
mié. 22/413:25
SJU
-
LHR
1 stop14h 25m
KLM
mié. 29/408:20
LHR
-
SJU
1 stop20h 39m
KLM
Deal found 8/2£451
dom. 29/315:30
SJU
-
LHR
1 stop16h 35m
KLM
mié. 8/412:50
LHR
-
SJU
1 stop16h 09m
KLM
Deal found 6/2£452
jue. 19/313:14
SJU
-
LHR
1 stop13h 36m
Delta
mar. 24/320:00
LHR
-
SJU
2 stops21h 27m
Delta
Deal found 7/2£454

Find flight deals from Puerto Rico to Heathrow

Keep the following information in mind while searching for Puerto Rico to Heathrow flight deals. Data was last updated 8 febrero 2026.

Round-trip from

£424

One-way from

£228

Popular in

June

Cheapest in

February

Average price

£429
United Airlines
  • United Airlines
  • 10/3-17/3
  • 3 total stops
  • 53h 02m total
  • Puerto Rico to London
Search Deals
JetBlue
  • JetBlue
  • 29/7
  • 1 total stop
  • 12h 15m total
  • Puerto Rico to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£102 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Puerto Rico to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 8 febrero 2026.
Use the filters below to find and compare flights from Puerto Rico to London Heathrow Airport that are best for you.

Fly from

Puerto Rico

Fly to

Heathrow

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

lun. 4/5

07:40-06:45

1 stop18h 05m

London Heathrow

mié. 13/5

06:50-21:24

2 stops19h 34m

£437

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

mar. 21/4

01:00-20:40

1 stop14h 40m

London Heathrow

mié. 29/4

07:30-21:24

2 stops18h 54m

£438

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

dom. 8/3

17:10-10:15

1 stop13h 05m

London Heathrow

dom. 15/3

08:55-20:18

1 stop15h 23m

£438

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

lun. 9/3

06:40-10:15

1 stop23h 35m

London Heathrow

vie. 20/3

08:00-21:22

2 stops17h 22m

£438

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

jue. 5/3

12:15-06:55

1 stop14h 40m

London Heathrow

lun. 9/3

09:20-20:56

1 stop15h 36m

£445

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

jue. 19/3

13:14-06:50

1 stop13h 36m

London Heathrow

mié. 25/3

12:30-23:15

1 stop14h 45m

£445

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

mié. 22/4

17:34-13:15

1 stop14h 41m

London Heathrow

mié. 29/4

09:20-23:13

1 stop18h 53m

£451

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

jue. 19/3

13:14-06:50

1 stop13h 36m

London Heathrow

mar. 24/3

20:00-13:27

2 stops21h 27m

£454

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

mié. 29/7

03:30-20:45

1 stop12h 15m

£228

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

dom. 12/4

05:01-06:30

1 stop20h 29m

£236

Flights are sorted by cheapest return flights first.

Deals found on 7/2

Showing 1-10 of 15 results
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Best time to book a flight from Puerto Rico to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Puerto Rico with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Puerto Rico to London Heathrow Airport

What is the cheapest month to book a flight from Puerto Rico to London Heathrow Airport?

Currently, September is the cheapest month in which you can book a flight from Puerto Rico to London Heathrow Airport (average of £74). Flying from Puerto Rico to London Heathrow Airport in June is currently the most expensive (average of £676). 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.

Related info for your journey

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

  • How long is the flight from Puerto Rico to London Heathrow Airport?

    There are many flights that can get you from Puerto Rico to London Heathrow Airport in 18h 05m. Fly via United Airlines to get the fastest option. There are 4179 mi between Puerto Rico and London Heathrow Airport.

  • What are the most popular routes from Puerto Rico to London Heathrow Airport?

    The most popular flight routes from Puerto Rico to London Heathrow Airport are San Juan Luis Munoz Marin Intl - London Heathrow, Culebra - London Heathrow and Ponce Mercedita - London Heathrow.

  • Can I find deals for flights from Puerto Rico to Heathrow that include hotel bookings?

    Yes. In addition to deals on Puerto Rico to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Puerto Rico to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Puerto Rico to Heathrow.

  • Can I find deals for business class flights from Puerto Rico to Heathrow?

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

  • What is the cheapest month to book a flight from Puerto Rico to London Heathrow Airport?

    Currently, September is the cheapest month in which you can book a flight from Puerto Rico to London Heathrow Airport (average of £74). Flying from Puerto Rico to London Heathrow Airport in June is currently the most expensive (average of £676). 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.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Northampton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Swindon
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames

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How does Cheapflights help users find flights from Puerto Rico to Heathrow?

Cheapflights helps you search for flights from Puerto Rico to Heathrow 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.

Why should you use Cheapflights to find cheap flight tickets from Puerto Rico to Heathrow?

Cheapflights simply makes it quick and affordable to book flights from Puerto Rico to Heathrow by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Puerto Rico to Heathrow with no change fees?

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

Can Cheapflights notify me if prices for flights from Puerto Rico to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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