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Cheap flights from Puerto Rico to London from £203

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 16/11. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
8 Sep — 15 Sep1
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 9 August 2026.

Tue 15/908:55 -
2 stops23h 35m
Tue 22/907:40 -
2 stops29h 21m
Deal found 7/8£495
Sun 18/1002:58 -
1 stop26h 02m
Wed 28/1010:10 -
1 stop19h 40m
Deal found 7/8£508
Wed 21/1002:58 -
1 stop26h 02m
Wed 28/1010:10 -
1 stop19h 40m
Deal found 7/8£510
Sat 24/1006:05 -
1 stop22h 55m
Fri 6/1112:35 -
1 stop18h 15m
Deal found 9/8£516
Mon 19/1006:05 -
1 stop22h 55m
Thu 29/1011:00 -
1 stop18h 50m
Deal found 7/8£519
Mon 19/1006:05 -
1 stop22h 55m
Fri 30/1012:35 -
1 stop17h 15m
Deal found 7/8£520
Sun 18/1009:03 -
1 stop19h 57m
Wed 28/1010:10 -
1 stop19h 40m
Deal found 7/8£528
Sun 18/1009:03 -
1 stop19h 57m
Thu 29/1011:00 -
1 stop18h 50m
Deal found 7/8£538
Sun 18/1009:03 -
1 stop19h 57m
Fri 30/1012:35 -
1 stop17h 15m
Deal found 7/8£539
Thu 22/1009:03 -
1 stop19h 57m
Thu 29/1011:00 -
1 stop18h 50m
Deal found 7/8£546
Thu 22/1009:03 -
1 stop19h 57m
Fri 30/1012:35 -
1 stop17h 15m
Deal found 7/8£547
Mon 10/822:48 -
1 stop30h 12m
Wed 9/914:00 -
1 stop16h 52m
Deal found 5/8£551

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 9 August 2026.

Round-trip from

£495

One-way from

£203

Popular in

June

Cheapest in

February

Average price

£695
15/9-22/9
  • 15/9-22/9
  • 4 total stops
  • 59h 01m total
  • Puerto Rico to London
Search Deals
Iberia
  • Iberia
  • 16/11
  • 1 total stop
  • 13h 10m total
  • Puerto Rico to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£113 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 9 August 2026.
Use the filters below to find and compare flights from Puerto Rico to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PonceLondon

PSE Ponce Mercedita - LHR London Heathrow

PSELHR

Ponce Mercedita

Tue 15/9

08:55-13:30

2 stops23h 35m

London Heathrow

Tue 22/9

07:40-08:01

2 stops29h 21m

£495

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Mon 16/11

21:35-14:20

1 stop12h 45m

London Heathrow

Fri 20/11

08:45-23:57

2 stops19h 12m

£615

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Thu 5/11

07:00-06:55

1 stop19h 55m

London Heathrow

Tue 10/11

09:20-00:25

1 stop19h 05m

£624

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Sun 11/10

13:15-08:50

1 stop14h 35m

London Heathrow

Sun 18/10

11:45-23:44

2 stops16h 59m

£654

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Mon 28/12

18:05-20:10

1 stop22h 05m

London Heathrow

Fri 8/1

09:05-23:50

2 stops18h 45m

£668

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Wed 30/12

16:55-05:55

1 stop33h 00m

London Heathrow

Fri 8/1

06:50-00:36

2 stops21h 46m

£673

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Tue 15/9

01:00-06:30

2 stops24h 30m

London Heathrow

Thu 24/9

06:50-23:50

2 stops22h 00m

£677

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Sun 6/9

13:04-09:30

1 stop15h 26m

London Heathrow

Tue 8/9

11:55-23:01

1 stop16h 06m

£705

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Thu 24/9

13:16-07:15

1 stop12h 59m

London Heathrow

Mon 28/9

06:30-23:49

2 stops22h 19m

£705

San JuanLondon

SJU San Juan Luis Munoz Marin Intl - LHR London Heathrow

SJULHR

San Juan Luis Munoz Marin Intl

Sat 14/11

14:35-21:20

1 stop26h 45m

London Heathrow

Sun 29/11

13:00-11:50

2 stops50h 50m

£711

Flights are sorted by cheapest return flights first.

Deals found on 5/8

Showing 1-10 of 51 resultsSorted by cheapest first
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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, January is the cheapest month in which you can book a flight from Puerto Rico to London (average of £464). Flying from Puerto Rico to London in June is currently the most expensive (average of £857). 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.

How far ahead should I book a flight from Puerto Rico to London?

Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Puerto Rico to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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, JetBlue, and Delta fly from Puerto Rico to London in about 15h 20m. The time it takes to get you to your destination can typically vary by up to 8h 10m. 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, January is the cheapest month in which you can book a flight from Puerto Rico to London (average of £464). Flying from Puerto Rico to London in June is currently the most expensive (average of £857). 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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