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Cheap flights from Puerto Rico to London from £196

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 26/10. 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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Find the cheapest flights from Puerto Rico to London

Recent return flight deals from Puerto Rico to London

KLM Logo
14:10 - 08:05SJU-LHR
13h 55m1 stop
KLM Logo
12:30 - 23:13LHR-SJU
14h 43m1 stop
£420KLM
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Tue, 11 Nov - Thu, 20 Nov
Delta Logo
17:41 - 07:15SJU-LHR
32h 34m1 stop
Delta Logo
09:55 - 23:56LHR-SJU
19h 01m2 stops
£425Delta
Find Deal
Sat, 4 Oct - Tue, 14 Oct
United Airlines Logo
07:00 - 07:40SJU-LHR
19h 40m1 stop
United Airlines Logo
09:30 - 23:57LHR-SJU
19h 27m2 stops
£426United Airlines
Find Deal
Wed, 8 Oct - Wed, 15 Oct
United Airlines Logo
16:50 - 10:50SJU-LHR
14h 00m1 stop
United Airlines Logo
09:10 - 22:22LHR-SJU
17h 12m2 stops
£430United Airlines
Find Deal
Wed, 29 Oct - Tue, 4 Nov
Logo
14:35 - 06:35SJU-LHR
12h 00m1 stop
Logo
09:55 - 19:55LHR-SJU
15h 00m1 stop
£439
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Mon, 12 Jan - Fri, 17 Apr
Air Canada Logo
16:55 - 06:30SJU-LHR
32h 35m2 stops
Air Canada Logo
09:30 - 12:00LHR-SJU
31h 30m2 stops
£460Air Canada
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Sat, 4 Oct - Tue, 14 Oct
British Airways Logo
12:50 - 06:50SJU-LHR
14h 00m1 stop
British Airways Logo
13:10 - 23:40LHR-SJU
14h 30m1 stop
£464British Airways
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Thu, 22 Jan - Thu, 29 Jan
Logo
06:22 - 07:15SJU-LHR
19h 53m1 stop
Logo
20:25 - 15:24LHR-SJU
23h 59m1 stop
£468
Find Deal
Sat, 11 Oct - Sat, 18 Oct
Air Canada Logo
01:05 - 21:35SJU-LHR
39h 30m2 stops
Air Canada Logo
13:25 - 12:49LHR-SJU
27h 24m2 stops
£478Air Canada
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Fri, 24 Oct - Sun, 2 Nov
British Airways Logo
07:00 - 09:25SJU-LHR
21h 25m1 stop
British Airways Logo
12:30 - 23:59LHR-SJU
16h 29m1 stop
£484British Airways
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Thu, 9 Oct - Thu, 16 Oct

United Airlines flights from Puerto Rico to London Heathrow Airport

Our best United Airlines deals on Puerto Rico to London Heathrow Airport flight tickets
United Airlines
8 Oct
SJU07:00San Juan Luis Munoz Marin Intl
19h 40m
1 stop
LHR07:40London Heathrow
15 Oct
LHR09:30London Heathrow
19h 27m
2 stops
SJU23:57San Juan Luis Munoz Marin Intl
£426
Find similar
United Airlines
29 Oct
SJU16:50San Juan Luis Munoz Marin Intl
14h 00m
1 stop
LHR10:50London Heathrow
4 Nov
LHR09:10London Heathrow
17h 12m
2 stops
SJU22:22San Juan Luis Munoz Marin Intl
£430
Find similar
United Airlines
29 Oct
SJU13:20San Juan Luis Munoz Marin Intl
17h 30m
2 stops
LHR10:50London Heathrow
4 Nov
LHR07:40London Heathrow
20h 56m
2 stops
SJU00:36San Juan Luis Munoz Marin Intl
£430
Find similar

Delta flights from Puerto Rico to London Heathrow Airport

Our best Delta deals on Puerto Rico to London Heathrow Airport flight tickets
Delta
4 Oct
SJU17:41San Juan Luis Munoz Marin Intl
32h 34m
1 stop
LHR07:15London Heathrow
14 Oct
LHR09:55London Heathrow
19h 01m
2 stops
SJU23:56San Juan Luis Munoz Marin Intl
£425
Find similar
Delta
29 Oct
SJU07:15San Juan Luis Munoz Marin Intl
21h 30m
2 stops
LHR08:45London Heathrow
6 Nov
LHR14:30London Heathrow
14h 26m
1 stop
SJU00:56San Juan Luis Munoz Marin Intl
£433
Find similar
Delta
29 Oct
SJU07:15San Juan Luis Munoz Marin Intl
21h 30m
2 stops
LHR08:45London Heathrow
6 Nov
LHR20:00London Heathrow
20h 56m
1 stop
SJU12:56San Juan Luis Munoz Marin Intl
£434
Find similar

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 September 2025.
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

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 11/11

14:10-08:05

1 stop13h 55m

London Heathrow

Thu 20/11

12:30-23:13

1 stop14h 43m

£420

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 4/10

17:41-07:15

1 stop32h 34m

London Heathrow

Tue 14/10

09:55-23:56

2 stops19h 01m

£425

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 8/10

07:00-07:40

1 stop19h 40m

London Heathrow

Wed 15/10

09:30-23:57

2 stops19h 27m

£426

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 29/10

16:50-10:50

1 stop14h 00m

London Heathrow

Tue 4/11

09:10-22:22

2 stops17h 12m

£430

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 12/1

14:35-06:35

1 stop12h 00m

London Heathrow

Fri 17/4

09:55-19:55

1 stop15h 00m

£439

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 4/10

16:55-06:30

2 stops32h 35m

London Heathrow

Tue 14/10

09:30-12:00

2 stops31h 30m

£460

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 22/1

12:50-06:50

1 stop14h 00m

London Heathrow

Thu 29/1

13:10-23:40

1 stop14h 30m

£464

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 11/10

06:22-07:15

1 stop19h 53m

London Heathrow

Sat 18/10

20:25-15:24

1 stop23h 59m

£468

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 24/10

01:05-21:35

2 stops39h 30m

London Heathrow

Sun 2/11

13:25-12:49

2 stops27h 24m

£478

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 9/10

07:00-09:25

1 stop21h 25m

London Heathrow

Thu 16/10

12:30-23:59

1 stop16h 29m

£484

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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, October 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 £480. The month of September is another great option to travel to London Heathrow Airport, with average flight prices from Puerto Rico averaging around £501.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from Puerto Rico is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £465. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £1,048.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from Puerto Rico to London Heathrow Airport at midday for as low as £534. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £1,046 on average. Flights to London Heathrow Airport from Puerto Rico in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight 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 £609 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 £417 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

Direct flights

None
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.
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  • 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 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Luton
Milton Keynes
Maidstone
Northampton
Gatwick
Slough
Swindon
Canterbury
Stratford-upon-Avon
Southend-on-Sea
Ipswich
Ilford
Guildford
Swanage
Poole
Colchester
Worthing
Salisbury
Dover

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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