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Cheap flights from Puerto Rico to London from £198

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Puerto Rico to London departing on 5/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Puerto Rico to London

Recent return flight deals from Puerto Rico to London

Enter your travel dates to find the best prices.
Iberia Logo
14:05 - 09:00
SJU
-
LHR
13h 55m
1 stop
Iberia Logo
12:15 - 23:59
LHR
-
SJU
16h 44m
1 stop
£521Iberia
Sun, 20 Sep - Sat, 26 Sep
Iberia Logo
14:00 - 09:00
SJU
-
LHR
14h 00m
1 stop
Iberia Logo
06:15 - 15:25
LHR
-
SJU
14h 10m
1 stop
£571Iberia
Sun, 18 Oct - Sat, 24 Oct
Iberia Logo
20:25 - 19:10
SJU
-
LHR
17h 45m
1 stop
Iberia Logo
11:30 - 18:50
LHR
-
SJU
12h 20m
1 stop
£598Iberia
Wed, 12 Aug - Wed, 26 Aug
Iberia Logo
20:25 - 17:15
SJU
-
LHR
15h 50m
1 stop
Iberia Logo
09:15 - 18:50
LHR
-
SJU
14h 35m
1 stop
£600Iberia
Wed, 12 Aug - Wed, 26 Aug
American Airlines Logo
15:47 - 12:50
SJU
-
LHR
16h 03m
1 stop
American Airlines Logo
11:30 - 18:50
LHR
-
SJU
12h 20m
1 stop
£601American Airlines
Wed, 12 Aug - Wed, 26 Aug
American Airlines Logo
15:47 - 12:50
SJU
-
LHR
16h 03m
1 stop
American Airlines Logo
06:15 - 18:50
LHR
-
SJU
17h 35m
1 stop
£602American Airlines
Wed, 12 Aug - Wed, 26 Aug
American Airlines Logo
15:47 - 12:50
SJU
-
LHR
16h 03m
1 stop
American Airlines Logo
06:15 - 18:50
LHR
-
SJU
17h 35m
1 stop
£603American Airlines
Wed, 12 Aug - Wed, 26 Aug
Delta Logo
13:32 - 10:20
SJU
-
LHR
15h 48m
1 stop
Delta Logo
06:30 - 23:56
LHR
-
SJU
22h 26m
2 stops
£606Delta
Wed, 30 Sep - Tue, 6 Oct
United Airlines Logo
14:55 - 09:20
SJU
-
LHR
13h 25m
1 stop
United Airlines Logo
09:30 - 23:50
LHR
-
SJU
19h 20m
2 stops
£608United Airlines
Wed, 12 Aug - Wed, 26 Aug
United Airlines Logo
16:55 - 10:40
SJU
-
LHR
12h 45m
1 stop
United Airlines Logo
09:30 - 23:50
LHR
-
SJU
19h 20m
2 stops
£608United Airlines
Wed, 12 Aug - Wed, 26 Aug

British Airways flights from Puerto Rico to London Heathrow Airport

Our best British Airways deals on Puerto Rico to London Heathrow Airport flight tickets
British Airways
14 Aug
SJU10:33San Juan Luis Munoz Marin Intl
15h 22m
1 stop
LHR06:55London Heathrow
28 Aug
LHR09:15London Heathrow
14h 35m
1 stop
SJU18:50San Juan Luis Munoz Marin Intl
£633
British Airways
16 May
SJU13:25San Juan Luis Munoz Marin Intl
13h 25m
1 stop
LHR07:50London Heathrow
7 Jun
LHR11:30London Heathrow
12h 30m
1 stop
SJU19:00San Juan Luis Munoz Marin Intl
£710
British Airways
22 May
SJU14:56San Juan Luis Munoz Marin Intl
13h 29m
1 stop
LHR09:25London Heathrow
5 Jun
LHR12:15London Heathrow
14h 43m
1 stop
SJU21:58San Juan Luis Munoz Marin Intl
£785

KLM flights from Puerto Rico to London Heathrow Airport

Our best KLM deals on Puerto Rico to London Heathrow Airport flight tickets
KLM
19 Aug
SJU14:59San Juan Luis Munoz Marin Intl
15h 21m
1 stop
LHR11:20London Heathrow
23 Aug
LHR09:20London Heathrow
18h 09m
1 stop
SJU22:29San Juan Luis Munoz Marin Intl
£660
KLM
5 Nov
SJU14:06San Juan Luis Munoz Marin Intl
13h 59m
1 stop
LHR08:05London Heathrow
10 Nov
LHR10:45London Heathrow
16h 28m
1 stop
SJU23:13San Juan Luis Munoz Marin Intl
£660

momondo Fare Finder

 
Customise your flight search to find flights from Puerto Rico to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 12 May 2026.
Use the filters below to find and compare flights from Puerto Rico to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 20/9

14:05-09:00

1 stop13h 55m

London Heathrow

Sat 26/9

12:15-23:59

1 stop16h 44m

£521
Fastest return journey

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 18/10

14:00-09:00

1 stop14h 00m

London Heathrow

Sat 24/10

06:15-15:25

1 stop14h 10m

£571

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

20:25-19:10

1 stop17h 45m

London Heathrow

Wed 26/8

11:30-18:50

1 stop12h 20m

£598

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

20:25-17:15

1 stop15h 50m

London Heathrow

Wed 26/8

09:15-18:50

1 stop14h 35m

£600

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

15:47-12:50

1 stop16h 03m

London Heathrow

Wed 26/8

11:30-18:50

1 stop12h 20m

£601

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

15:47-12:50

1 stop16h 03m

London Heathrow

Wed 26/8

06:15-18:50

1 stop17h 35m

£602

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

15:47-12:50

1 stop16h 03m

London Heathrow

Wed 26/8

06:15-18:50

1 stop17h 35m

£603

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 30/9

13:32-10:20

1 stop15h 48m

London Heathrow

Tue 6/10

06:30-23:56

2 stops22h 26m

£606

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

14:55-09:20

1 stop13h 25m

London Heathrow

Wed 26/8

09:30-23:50

2 stops19h 20m

£608

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

16:55-10:40

1 stop12h 45m

London Heathrow

Wed 26/8

09:30-23:50

2 stops19h 20m

£608

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to London from

How to get the cheapest flight ticket from Puerto Rico to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

In general, September is the cheapest month to fly from Puerto Rico to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £74. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Puerto Rico averaging around £74.

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

You are more likely to see cheaper flights to London Heathrow Airport from Puerto Rico when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £610 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Puerto Rico for as low as £488 on momondo.

Cheap Puerto Rico to London Heathrow Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Puerto Rico to London Heathrow Airport

Fastest flight time

12h 45m

Direct flights

None
The fastest flight from Puerto Rico to London Heathrow Airport takes 12h 45m
There are no direct flights from Puerto Rico to London Heathrow Airport. There are no popular flight routes from Puerto Rico to London Heathrow Airport.
Search flight deals

Frequently asked questions about flying from Puerto Rico to London Heathrow Airport

  • When did momondo last update prices for flights from Puerto Rico to London Heathrow Airport?

    Prices for flights from Puerto Rico to London Heathrow Airport were last updated today.

  • How many operators does momondo search for flights from Puerto Rico to London Heathrow Airport?

  • How old do you have to be to fly from Puerto Rico to London Heathrow Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Puerto Rico to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Puerto Rico to London Heathrow Airport

Compare and see reviews for airlines that fly from Puerto Rico to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom £564Free CancellationRating
7.1
2,973 reviews
Search JetBlue flights

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Why use momondo?

Why should I use momondo to find a flight deal from Puerto Rico to London?

It is quick and easy to find Puerto Rico to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

Can I find flights from Puerto Rico to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Puerto Rico to London flights to just show those with flexible booking policies.

How can momondo help me find flights from Puerto Rico to London?

momondo helps you find the best flight between Puerto Rico and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Puerto Rico to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Puerto Rico and alert you when they change.

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