HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
London

$237+ Cheap flights from Puerto Rico to London (LON)

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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
Dec 11 — Dec 181
Thu 12/11
Thu 12/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Puerto Rico to London with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 November 11, 2025.

Round-trip from

$556
(Delta)

One-way from

$237
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$718
From Puerto Rico to London (LON)
Search Deals
One-way flight from Puerto Rico to London (LON)
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($163 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Puerto Rico to London

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 November 11, 2025.

This KLM deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/112:10 pmSJU - LHR
1 stop13h 55mKLM
Thu 11/208:55 amLHR - SJU
1 stop18h 18mKLM
Deal found 11/10$534
This Delta deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:15 amSJU - LHR
1 stop23h 00mDelta
Tue 11/186:30 amLHR - SJU
2 stops21h 26mDelta
Deal found 11/9$542
This KLM deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:10 pmSJU - LHR
1 stop16h 05mKLM
Thu 11/278:55 amLHR - SJU
1 stop18h 18mKLM
Deal found 11/10$543
This Delta deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:00 amSJU - LHR
1 stop20h 50mDelta
Tue 11/258:55 amLHR - SJU
1 stop18h 18mDelta
Deal found 11/9$548
This Delta deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:57 pmSJU - LHR
2 stops15h 23mDelta
Thu 11/208:55 amLHR - SJU
1 stop18h 18mDelta
Deal found 11/10$552
This United Airlines deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:05 amSJU - LHR
2 stops25h 05mUnited Airlines
Thu 11/208:30 amLHR - SJU
2 stops17h 52mUnited Airlines
Deal found 11/10$565
This KLM deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/82:10 pmSJU - LHR
1 stop16h 05mKLM
Mon 12/228:55 amLHR - SJU
1 stop16h 14mKLM
Deal found 11/9$568
This United Airlines deal was found by Cheapflights users on 11/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/162:05 amSJU - LHR
1 stop14h 30mUnited Airlines
Thu 11/277:30 amLHR - SJU
2 stops18h 52mUnited Airlines
Deal found 11/10$574
This United Airlines deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/178:30 amSJU - LHR
2 stops19h 55mUnited Airlines
Tue 11/258:30 amLHR - SJU
2 stops20h 06mUnited Airlines
Deal found 11/9$579
This Delta deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:00 amSJU - LHR
1 stop19h 25mDelta
Sun 11/236:30 amLHR - SJU
2 stops21h 26mDelta
Deal found 11/9$592
This KLM deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:57 pmSJU - LHR
1 stop15h 03mKLM
Mon 11/2410:45 amLHR - SJU
1 stop16h 28mKLM
Deal found 11/9$593
This Kiwi.com deal was found by Cheapflights users on 11/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/189:00 amSJU - LGW
1 stop17h 00mMultiple Airlines
Thu 11/202:00 pmLGW - SJU
1 stop14h 24mMultiple Airlines
Deal found 11/9$654

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated November 11, 2025.
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

Tue 2/10

7:00 am-6:20 am

1 stop19h 20m

London Heathrow

Wed 2/18

8:00 pm-1:07 pm

1 stop21h 07m

$556

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 2/9

7:30 am-11:40 am

1 stop24h 10m

London Heathrow

Wed 2/18

3:50 pm-1:00 pm

1 stop25h 10m

$556

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/11

7:00 am-10:15 am

1 stop23h 15m

London Heathrow

Wed 2/18

3:50 pm-1:00 pm

1 stop25h 10m

$556

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/10

7:00 am-10:15 am

1 stop23h 15m

London Heathrow

Tue 2/17

8:00 pm-2:16 pm

2 stops22h 16m

$560

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/11

2:05 am-8:35 pm

1 stop14h 30m

London Heathrow

Tue 2/17

6:50 am-10:22 pm

2 stops19h 32m

$572

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 2/12

2:10 pm-9:00 am

1 stop14h 50m

London Heathrow

Wed 2/18

3:50 pm-1:00 pm

1 stop25h 10m

$576

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 2/12

4:52 pm-11:15 am

1 stop14h 23m

London Heathrow

Thu 2/19

9:30 am-12:36 am

2 stops19h 06m

$583

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 1/21

2:05 am-8:35 pm

1 stop14h 30m

London Heathrow

Thu 1/29

8:30 am-10:22 pm

2 stops17h 52m

$583

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Thu 1/22

9:25 pm-7:00 pm

1 stop17h 35m

London Gatwick

Thu 1/29

11:45 am-7:55 pm

1 stop12h 10m

$765

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Wed 2/18

6:10 am-9:50 am

2 stops23h 40m

London Gatwick

Fri 2/27

10:40 am-3:50 am

2 stops21h 10m

$858

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/8

Showing 1-10 of 29 results
1
2
3

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 round-trip 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 $101). Flying from Puerto Rico to London in June is currently the most expensive (average of $982). 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.

What is the cheapest time of day to fly from PR to LON?

Find hourly flight availability from Puerto Rico to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 11, 2025.

It’s typically best to fly out from Puerto Rico to London in the morning. Doing so could potentially save you 23% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Puerto Rico to London?

Use this chart to determine the cheapest time to fly round-trip from Puerto Rico to London. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Puerto Rico to London flight should consider departing on Wednesday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated November 11, 2025.
See what other customers who have flown with Delta, Virgin Atlantic, and United Airlines from Puerto Rico to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Delta
7.9
Good
8,005 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
Virgin Atlantic
7.5
Good
673 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
United Airlines
7.4
Good
9,012 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
American Airlines
7.2
Good
11,047 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.
JetBlue
7.2
Good
2,907 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Boarding

8.1

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Lane,Nov 2025

MEM - ATL

The crew was very friendly, but they only came around and offered the better Delta Comfort snacks one time. I thought they would come around more frequently on a 5 hour flight. They did do two beverage services though, which was nice.

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?

    Delta, Iberia, and TAP AIR PORTUGAL can get you from Puerto Rico to London in just under 17h 35m. Your travel time can differ by up to 6h 05m. The distance from Puerto Rico to London is about 4188 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Puerto Rico to London?

    The most popular flight routes from Puerto Rico to London are San Juan Luis Munoz Marin Intl - London Heathrow, San Juan Luis Munoz Marin Intl - London Gatwick and Vieques - London Heathrow.

  • 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 vacation 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 $101). Flying from Puerto Rico to London in June is currently the most expensive (average of $982). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Gatwick
Borehamwood
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone
Eastbourne
Sutton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 7 airlines flying from Puerto Rico to London

Discover the top 7 airlines that operate flights from Puerto Rico to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$729FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$546Average$737FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$605Average$1,092FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$649Average$799FlexibilityNo cancel feeOn-time69%
DeltaCheapest$652Average$859FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$654Average$840FlexibilityNo cancel feeOn-time72%
IberiaCheapest$696Average$1,288FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.