Latest deals
Insights
FAQs
Price Alerts

Cheap flights from Puerto Rico to London from £178

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 22/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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.
Delta Logo
07:30 - 11:40SJU-LHR
24h 10m1 stop
Delta Logo
15:50 - 13:00LHR-SJU
25h 10m1 stop
£422Delta
Find Deal
Mon, 9 Feb - Wed, 18 Feb
Delta Logo
07:00 - 06:50SJU-LHR
19h 50m2 stops
Delta Logo
20:00 - 14:16LHR-SJU
22h 16m2 stops
£425Delta
Find Deal
Mon, 9 Feb - Tue, 17 Feb
KLM Logo
14:10 - 10:15SJU-LHR
16h 05m1 stop
KLM Logo
08:55 - 21:09LHR-SJU
16h 14m1 stop
£431KLM
Find Deal
Mon, 8 Dec - Mon, 22 Dec
United Airlines Logo
02:05 - 20:35SJU-LHR
14h 30m1 stop
United Airlines Logo
06:50 - 22:22LHR-SJU
19h 32m2 stops
£434United Airlines
Find Deal
Wed, 11 Feb - Tue, 17 Feb
KLM Logo
15:10 - 08:45SJU-LHR
13h 35m1 stop
KLM Logo
12:30 - 23:20LHR-SJU
14h 50m1 stop
£436KLM
Find Deal
Thu, 4 Dec - Thu, 11 Dec
Air France Logo
15:55 - 11:40SJU-LHR
15h 45m1 stop
Air France Logo
08:55 - 20:57LHR-SJU
16h 02m1 stop
£437Air France
Find Deal
Thu, 22 Jan - Thu, 29 Jan
Delta Logo
14:23 - 06:50SJU-LHR
12h 27m1 stop
Delta Logo
10:45 - 13:00LHR-SJU
30h 15m1 stop
£441Delta
Find Deal
Thu, 12 Feb - Wed, 18 Feb
United Airlines Logo
02:05 - 21:20SJU-LHR
15h 15m1 stop
United Airlines Logo
07:30 - 22:22LHR-SJU
18h 52m2 stops
£442United Airlines
Find Deal
Tue, 17 Feb - Fri, 27 Feb
Air Canada Logo
02:05 - 07:10SJU-LHR
25h 05m2 stops
Air Canada Logo
15:00 - 13:55LHR-SJU
26h 55m1 stop
£445Air Canada
Find Deal
Fri, 13 Feb - Sat, 21 Feb
Air Canada Logo
02:05 - 07:10SJU-LHR
25h 05m2 stops
Air Canada Logo
11:10 - 12:49LHR-SJU
29h 39m2 stops
£454Air Canada
Find Deal
Fri, 13 Feb - Sat, 21 Feb

Delta flights from Puerto Rico to London Heathrow Airport

Our best Delta deals on Puerto Rico to London Heathrow Airport flight tickets
Delta
16 Nov
SJU07:15San Juan Luis Munoz Marin Intl
23h 00m
1 stop
LHR10:15London Heathrow
26 Nov
LHR13:05London Heathrow
28h 10m
1 stop
SJU13:15San Juan Luis Munoz Marin Intl
£416
Find similar
Delta
17 Nov
SJU15:32San Juan Luis Munoz Marin Intl
15h 18m
2 stops
LHR10:50London Heathrow
25 Nov
LHR10:45London Heathrow
16h 28m
1 stop
SJU23:13San Juan Luis Munoz Marin Intl
£419
Find similar
Delta
9 Feb
SJU07:30San Juan Luis Munoz Marin Intl
24h 10m
1 stop
LHR11:40London Heathrow
18 Feb
LHR15:50London Heathrow
25h 10m
1 stop
SJU13:00San Juan Luis Munoz Marin Intl
£422
Find similar

KLM flights from Puerto Rico to London Heathrow Airport

Our best KLM deals on Puerto Rico to London Heathrow Airport flight tickets
KLM
17 Nov
SJU14:10San Juan Luis Munoz Marin Intl
16h 05m
1 stop
LHR10:15London Heathrow
27 Nov
LHR08:55London Heathrow
18h 18m
1 stop
SJU23:13San Juan Luis Munoz Marin Intl
£412
Find similar
KLM
8 Dec
SJU14:10San Juan Luis Munoz Marin Intl
16h 05m
1 stop
LHR10:15London Heathrow
22 Dec
LHR08:55London Heathrow
16h 14m
1 stop
SJU21:09San Juan Luis Munoz Marin Intl
£431
Find similar
KLM
4 Dec
SJU15:10San Juan Luis Munoz Marin Intl
13h 35m
1 stop
LHR08:45London Heathrow
11 Dec
LHR12:30London Heathrow
14h 50m
1 stop
SJU23:20San Juan Luis Munoz Marin Intl
£436
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 11 November 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

Mon 9/2

07:30-11:40

1 stop24h 10m

London Heathrow

Wed 18/2

15:50-13:00

1 stop25h 10m

£422

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 9/2

07:00-06:50

2 stops19h 50m

London Heathrow

Tue 17/2

20:00-14:16

2 stops22h 16m

£425

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 8/12

14:10-10:15

1 stop16h 05m

London Heathrow

Mon 22/12

08:55-21:09

1 stop16h 14m

£431

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 11/2

02:05-20:35

1 stop14h 30m

London Heathrow

Tue 17/2

06:50-22:22

2 stops19h 32m

£434

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 4/12

15:10-08:45

1 stop13h 35m

London Heathrow

Thu 11/12

12:30-23:20

1 stop14h 50m

£436

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 22/1

15:55-11:40

1 stop15h 45m

London Heathrow

Thu 29/1

08:55-20:57

1 stop16h 02m

£437

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 12/2

14:23-06:50

1 stop12h 27m

London Heathrow

Wed 18/2

10:45-13:00

1 stop30h 15m

£441

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 17/2

02:05-21:20

1 stop15h 15m

London Heathrow

Fri 27/2

07:30-22:22

2 stops18h 52m

£442

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 13/2

02:05-07:10

2 stops25h 05m

London Heathrow

Sat 21/2

15:00-13:55

1 stop26h 55m

£445

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 13/2

02:05-07:10

2 stops25h 05m

London Heathrow

Sat 21/2

11:10-12:49

2 stops29h 39m

£454

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 £469. The month of March is another great option to travel to London Heathrow Airport, with average flight prices from Puerto Rico averaging around £503.

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 £478. 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 £1,078.

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 £549. 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 £1,076 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 £637 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 £485 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.
Search flight deals

  • 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
Milton Keynes
Luton
Gatwick
Maidstone
Slough
Northampton
Swindon
Canterbury
Stratford-upon-Avon
Southend-on-Sea
Ipswich
Ilford
Poole
Guildford
Swanage
Dover
Colchester
Chelmsford
Hayes

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.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 11/12
Thu 18/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London