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Cheap flights from Puerto Rico to London from £155

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 23/3. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
27 Feb — 6 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Puerto Rico to London

Enter your travel dates to find the best prices.

Cheapest flights from Puerto Rico to London
Explore the most affordable flight options available from Puerto Rico to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 January 2026.

Tue 24/216:40
SJU
-
LHR
1 stop15h 25m
Iberia
Tue 3/310:45
LHR
-
SJU
1 stop13h 10m
Iberia
Deal found 27/1£414
Tue 24/216:40
SJU
-
LHR
1 stop15h 25m
American Airlines
Tue 3/311:25
LHR
-
SJU
1 stop12h 30m
American Airlines
Deal found 25/1£419
Wed 11/316:50
SJU
-
LHR
1 stop14h 00m
United Airlines
Wed 18/306:50
LHR
-
SJU
2 stops18h 32m
United Airlines
Deal found 25/1£419
Tue 24/216:52
SJU
-
LHR
1 stop14h 23m
United Airlines
Tue 3/306:50
LHR
-
SJU
2 stops18h 10m
United Airlines
Deal found 27/1£421
Tue 24/207:30
SJU
-
LHR
1 stop18h 55m
Delta
Tue 3/306:30
LHR
-
SJU
2 stops21h 28m
Delta
Deal found 25/1£424
Tue 27/118:10
SJU
-
LGW
1 stop12h 40m
Multiple Airlines
Tue 3/210:00
LGW
-
SJU
1 stop13h 55m
Multiple Airlines
Deal found 26/1£430
Wed 11/317:22
SJU
-
LHR
1 stop12h 08m
JetBlue
Wed 18/312:20
LHR
-
SJU
1 stop14h 31m
JetBlue
Deal found 25/1£430
Tue 17/313:10
SJU
-
LHR
2 stops17h 40m
United Airlines
Tue 24/307:30
LHR
-
SJU
2 stops17h 52m
United Airlines
Deal found 25/1£431
Wed 22/413:25
SJU
-
LHR
2 stops16h 15m
United Airlines
Wed 29/407:30
LHR
-
SJU
2 stops18h 54m
United Airlines
Deal found 26/1£432
Mon 9/307:05
SJU
-
LHR
1 stop19h 35m
United Airlines
Fri 20/307:25
LHR
-
SJU
1 stop16h 35m
United Airlines
Deal found 26/1£433
Fri 1/519:05
SJU
-
LGW
1 stop33h 55m
Multiple Airlines
Tue 12/514:00
LGW
-
SJU
1 stop29h 28m
Multiple Airlines
Deal found 26/1£467
Sun 19/403:08
SJU
-
LGW
2 stops22h 12m
Multiple Airlines
Fri 24/413:05
LGW
-
SJU
1 stop26h 21m
Multiple Airlines
Deal found 26/1£473

Find flight deals from Puerto Rico to London

Keep the following information in mind while searching for Puerto Rico to London flight deals. Data was last updated 28 January 2026.

Round-trip from

£414

One-way from

£155

Popular in

June

Cheapest in

February

Average price

£456
Iberia
  • Iberia
  • 24/2-3/3
  • 2 total stops
  • 28h 35m total
  • Puerto Rico to London
Search Deals
23/3
  • 23/3
  • 1 total stop
  • 28h 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. 4% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Puerto Rico to London 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 28 January 2026.
Use the filters below to find and compare flights from Puerto Rico to London that are best for you.

Fly from

Puerto Rico

Fly to

London

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 11/3

16:50-10:50

1 stop14h 00m

London Heathrow

Wed 18/3

06:50-21:22

2 stops18h 32m

£419

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 24/2

07:30-06:25

1 stop18h 55m

London Heathrow

Tue 3/3

06:30-23:58

2 stops21h 28m

£424

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

13:25-09:20

1 stop14h 55m

London Heathrow

Wed 29/4

07:30-21:24

2 stops18h 54m

£435

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 19/3

17:10-10:15

1 stop13h 05m

London Heathrow

Thu 26/3

08:55-23:15

1 stop18h 20m

£435

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 15/4

15:56-11:45

1 stop14h 49m

London Heathrow

Thu 30/4

07:30-21:24

2 stops18h 54m

£439

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 18/2

05:15-21:40

1 stop12h 25m

London Heathrow

Thu 26/2

12:20-03:51

1 stop19h 31m

£440

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 14/3

16:50-06:40

1 stop33h 50m

London Heathrow

Sun 22/3

12:05-12:17

1 stop28h 12m

£440

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 19/3

13:14-06:50

1 stop13h 36m

London Heathrow

Thu 26/3

08:55-23:15

1 stop18h 20m

£442

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

13:25-08:50

1 stop14h 25m

London Heathrow

Wed 29/4

11:45-23:59

1 stop17h 14m

£448

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 31/3

07:40-09:00

1 stop20h 20m

London Heathrow

Fri 17/4

08:00-20:34

1 stop17h 34m

£452

Flights are sorted by cheapest return flights first.

Deals found on 26/1

Showing 1-10 of 49 results
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Best time to book a flight from Puerto Rico to London

Have a flexible travel schedule? Discover the best time to fly to London 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

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

Currently, September is the cheapest month in which you can book a flight from Puerto Rico to London (average of £74). Flying from Puerto Rico to London in June is currently the most expensive (average of £711). 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 London. 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?

    Airlines like United Airlines, Delta, and British Airways fly from Puerto Rico to London in about 12h 40m. The time it takes to get you to your destination can typically vary by up to 6h 15m. The distance from Puerto Rico to London is about 4201 mi. This flight may include one or multiple stops.

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

    When deciding which route to take from Puerto Rico to London consider San Juan Luis Munoz Marin Intl - London Heathrow, San Juan Luis Munoz Marin Intl - London Gatwick or San Juan Luis Munoz Marin Intl - London City as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Puerto Rico to London 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?

    Currently, September is the cheapest month in which you can book a flight from Puerto Rico to London (average of £74). Flying from Puerto Rico to London in June is currently the most expensive (average of £711). 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?

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Gatwick
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Hounslow
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Watford
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Kingston upon Thames
Eastbourne
Romford
Ipswich

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Alternative routes for Puerto Rico to London

See prices for flight routes from nearby airports that may be better suited for you.
Bridgetown to Heathrow flights
Luis Munoz Marin Intl to Heathrow flights
Nassau to Heathrow flights
Luis Munoz Marin Intl to Gatwick flights
Kingston to Heathrow flights
Bridgetown to Gatwick flights
Castries to Gatwick flights
Port of Spain to Heathrow flights
St. George's to Heathrow flights
Bridgetown to London City flights
Montego Bay to Heathrow flights
Castries to Heathrow flights
St. John's to Gatwick flights
Kingston to Gatwick flights
Punta Cana to Gatwick flights
Santo Domingo to Gatwick flights
St. John's to Heathrow flights
Port of Spain to Gatwick flights
St. George's to Gatwick flights
Santo Domingo to Heathrow flights
George Town to Heathrow flights
Bridgetown to Manchester flights
Punta Cana to Heathrow flights
Luis Munoz Marin Intl to Edinburgh flights
Road Town to Gatwick flights
Montego Bay to Gatwick flights
George Town to Gatwick flights
Nassau to Gatwick flights
Simpson Bay to Gatwick flights
Port of Spain to Stansted flights
Kingston to Stansted flights
Simpson Bay to Heathrow flights
Providenciales to Manchester flights
Providenciales to Gatwick flights
Montego Bay to London City flights
Providenciales to Heathrow flights
Saint Thomas Island to Heathrow flights
Havana to Heathrow flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Deals for Puerto Rico to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to London from Puerto Rico.

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

Certainly. Search results for flights to London from Puerto Rico shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Not ready to book yet? You can track prices for flights from Puerto Rico to London on Cheapflights with our Price Alert feature and get notified when better prices are available.

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