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Cheap flights from Puerto Rico to London 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 — LON
9 Mar — 16 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 7 February 2026.

Mon 4/507:40
SJU
-
LHR
1 stop18h 05m
United Airlines
Wed 13/506:50
LHR
-
SJU
2 stops19h 34m
United Airlines
Deal found 6/2£437
Tue 21/401:00
SJU
-
LHR
1 stop14h 40m
United Airlines
Wed 29/407:30
LHR
-
SJU
2 stops18h 54m
United Airlines
Deal found 7/2£438
Mon 9/314:44
SJU
-
LHR
1 stop14h 16m
KLM
Fri 20/315:50
LHR
-
SJU
1 stop22h 55m
KLM
Deal found 7/2£438
Thu 19/313:14
SJU
-
LHR
1 stop13h 36m
KLM
Tue 24/312:40
LHR
-
SJU
1 stop15h 19m
KLM
Deal found 7/2£445
Tue 17/211:00
SJU
-
LHR
1 stop15h 55m
JetBlue
Mon 2/308:05
LHR
-
SJU
1 stop20h 24m
JetBlue
Deal found 5/2£446
Tue 3/311:22
SJU
-
LGW
2 stops19h 33m
Multiple Airlines
Tue 10/311:55
LGW
-
SJU
2 stops35h 11m
Multiple Airlines
Deal found 3/2£447
Sun 29/313:14
SJU
-
LHR
1 stop12h 31m
KLM
Wed 8/409:20
LHR
-
SJU
1 stop15h 58m
KLM
Deal found 7/2£451
Thu 19/313:14
SJU
-
LHR
1 stop13h 36m
Delta
Tue 24/320:00
LHR
-
SJU
2 stops21h 27m
Delta
Deal found 7/2£454
Tue 31/313:14
SJU
-
LHR
1 stop12h 31m
KLM
Tue 7/413:25
LHR
-
SJU
1 stop14h 50m
KLM
Deal found 7/2£457
Wed 4/318:10
SJU
-
LGW
1 stop12h 40m
Multiple Airlines
Wed 11/310:00
LGW
-
SJU
1 stop13h 55m
Multiple Airlines
Deal found 4/2£480
Sun 1/303:53
SJU
-
LGW
1 stop26h 07m
Multiple Airlines
Thu 5/314:00
LGW
-
SJU
1 stop16h 53m
Multiple Airlines
Deal found 5/2£523
Wed 18/221:25
SJU
-
LGW
1 stop17h 35m
Iberia
Thu 26/211:45
LGW
-
SJU
1 stop12h 10m
Iberia
Deal found 5/2£548

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 7 February 2026.

Round-trip from

£425

One-way from

£228

Popular in

June

Cheapest in

February

Average price

£429
United Airlines
  • United Airlines
  • 3/3-10/3
  • 3 total stops
  • 54h 16m 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 (£103 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 February 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 7 February 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

Mon 4/5

07:40-06:45

1 stop18h 05m

London Heathrow

Wed 13/5

06:50-21:24

2 stops19h 34m

£437

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 8/3

17:10-10:15

1 stop13h 05m

London Heathrow

Sun 15/3

08:55-20:18

1 stop15h 23m

£438

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 9/3

06:40-10:15

1 stop23h 35m

London Heathrow

Fri 20/3

08:00-21:22

2 stops17h 22m

£438

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 17/3

14:07-08:45

1 stop14h 38m

London Heathrow

Thu 26/3

10:10-23:59

1 stop17h 49m

£445

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 22/4

17:34-13:15

1 stop14h 41m

London Heathrow

Wed 29/4

09:20-23:13

1 stop18h 53m

£451

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 31/3

13:14-06:45

1 stop12h 31m

London Heathrow

Tue 7/4

09:20-23:15

1 stop18h 55m

£458

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 31/3

14:07-13:15

2 stops18h 08m

London Heathrow

Tue 7/4

20:05-16:18

2 stops25h 13m

£466

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Tue 3/3

06:00-10:55

3 stops24h 55m

London Gatwick

Tue 10/3

11:55-19:06

2 stops35h 11m

£514

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Mon 4/5

07:00-10:00

1 stop22h 00m

London Gatwick

Fri 8/5

14:00-08:47

1 stop23h 47m

£580

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Wed 18/3

03:08-10:00

1 stop26h 52m

London Gatwick

Wed 25/3

20:30-19:50

2 stops27h 20m

£635

Flights are sorted by cheapest return flights first.

Deals found on 7/2

Showing 1-10 of 51 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 £679). 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, KLM, and TAP AIR PORTUGAL fly from Puerto Rico to London in about 14h 38m. The time it takes to get you to your destination can typically vary by up to 9h 02m. The distance from Puerto Rico to London is about 4179 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 £679). 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

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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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