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$254+ 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
ago. 5 — ago. 121
mar. 8/5
mar. 8/12
1 adult, Economy
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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 julio 31, 2025.

Round-trip from

$533
(KLM)

One-way from

$254
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$962
From Puerto Rico to London (LON)
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One-way flight from Puerto Rico to London (LON)
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Highest demand for flights based on searches. 16% potential increase in price ($160 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 julio 31, 2025.

This KLM deal was found by Cheapflights users on 7/31. 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.
mié. 8/271:34 pmSJU - LGW
1 stop15h 26mKLM
vie. 9/512:00 pmLGW - SJU
1 stop16h 51mKLM
Deal found 7/31$533
This United Airlines deal was found by Cheapflights users on 7/31. 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.
sáb. 8/91:05 amSJU - LHR
1 stop29h 20mUnited Airlines
mar. 8/266:50 amLHR - SJU
2 stops22h 07mUnited Airlines
Deal found 7/31$554
This KLM deal was found by Cheapflights users on 7/31. 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.
mié. 8/271:16 pmSJU - LHR
1 stop12h 29mKLM
vie. 9/510:55 amLHR - SJU
1 stop17h 56mKLM
Deal found 7/31$566
This Delta deal was found by Cheapflights users on 7/31. 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.
mar. 8/261:16 pmSJU - LHR
1 stop16h 14mDelta
mar. 9/96:30 amLHR - SJU
2 stops22h 21mDelta
Deal found 7/31$574
This British Airways deal was found by Cheapflights users on 7/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/243:55 pmSJU - LHR
1 stop12h 30mBritish Airways
mié. 10/11:40 pmLHR - SJU
1 stop26h 31mBritish Airways
Deal found 7/30$576
This Norse deal was found by Cheapflights users on 7/29. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/178:00 pmSJU - LGW
1 stop29h 55mMultiple Airlines
dom. 8/2410:00 amLGW - SJU
1 stop28h 05mMultiple Airlines
Deal found 7/29$622
This Air Canada deal was found by Cheapflights users on 7/31. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/241:05 amSJU - LHR
2 stops24h 30mAir Canada
vie. 10/105:40 pmLHR - SJU
2 stops35h 17mAir Canada
Deal found 7/31$649
This Priceline deal was found by Cheapflights users on 7/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/246:00 amSJU - LGW
1 stop22h 35mJetBlue
jue. 8/2812:10 pmLGW - SJU
1 stop18h 12mJetBlue
Deal found 7/29$689
This Priceline deal was found by Cheapflights users on 7/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/194:50 pmSJU - LGW
1 stop13h 00mIberia
mar. 8/268:40 pmLGW - SJU
1 stop26h 50mIberia
Deal found 7/30$789
This TAP AIR PORTUGAL deal was found by Cheapflights users on 7/30. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/73:55 pmSJU - LGW
2 stops23h 30mTAP AIR PORTUGAL
dom. 10/1912:05 pmLGW - SJU
2 stops28h 57mTAP AIR PORTUGAL
Deal found 7/30$854
This United Airlines deal was found by Cheapflights users on 7/30. 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.
jue. 11/138:45 amVQS - LHR
2 stops22h 05mUnited Airlines
lun. 11/1712:05 pmLHR - VQS
2 stops33h 55mUnited Airlines
Deal found 7/30$2,180

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 julio 31, 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 - LGW

SJULGW

San Juan Luis Munoz Marin Intl

mié. 8/27

1:34 pm-10:00 am

1 stop15h 26m

London Gatwick

vie. 9/5

12:00 pm-11:51 pm

1 stop16h 51m

$533

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

mié. 8/27

1:16 pm-6:45 am

1 stop12h 29m

London Heathrow

vie. 9/5

10:55 am-11:51 pm

1 stop17h 56m

$566

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

mar. 8/26

1:16 pm-10:30 am

1 stop16h 14m

London Heathrow

mar. 9/9

6:30 am-11:51 pm

2 stops22h 21m

$574

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

mar. 9/23

1:05 am-8:40 pm

1 stop14h 35m

London Heathrow

mié. 10/1

9:30 am-11:57 pm

2 stops19h 27m

$575

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

dom. 8/17

8:00 pm-6:55 am

1 stop29h 55m

London Gatwick

dom. 8/24

10:00 am-9:05 am

1 stop28h 05m

$622

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

mié. 9/24

1:05 am-6:35 am

2 stops24h 30m

London Heathrow

vie. 10/10

5:40 pm-11:57 pm

2 stops35h 17m

$649

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

dom. 8/17

6:00 am-12:00 pm

2 stops25h 00m

London Heathrow

dom. 8/24

1:40 pm-11:59 pm

1 stop15h 19m

$685

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

dom. 8/24

6:00 am-9:35 am

1 stop22h 35m

London Gatwick

jue. 8/28

12:10 pm-1:22 am

1 stop18h 12m

$689

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

mar. 8/19

4:50 pm-10:50 am

1 stop13h 00m

London Gatwick

mar. 8/26

8:40 pm-6:30 pm

1 stop26h 50m

$789

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

mar. 10/7

3:55 pm-8:25 pm

2 stops23h 30m

London Gatwick

dom. 10/19

12:05 pm-12:02 pm

2 stops28h 57m

$854

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 26 results
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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 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, November is the cheapest month in which you can book a flight from Puerto Rico to London (average of $661). Flying from Puerto Rico to London in June is currently the most expensive (average of $1,097). 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 julio 31, 2025.

When flying from Puerto Rico to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 julio 31, 2025.
See what other customers who have flown with Delta, KLM, 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
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Turkish Airlines
7.3
Good
3,933 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
JetBlue
7.3
Good
2,914 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

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.

  • What are the cheapest airlines to fly from Puerto Rico to London one-way?

    $355 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on United Airlines and KLM, with prices starting from $372 and $436, respectively.

  • 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 Gatwick, San Juan Luis Munoz Marin Intl - London Heathrow 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, November is the cheapest month in which you can book a flight from Puerto Rico to London (average of $661). Flying from Puerto Rico to London in June is currently the most expensive (average of $1,097). 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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Browse thousands of different options on Cheapflights for your next trip

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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 julio 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$754FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$625Average$765FlexibilityNo cancel feeOn-time70%
IberiaCheapest$632Average$1,200FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$649Average$795FlexibilityNo cancel feeOn-time69%
DeltaCheapest$651Average$797FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$654Average$820FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$654Average$1,024FlexibilityNo cancel feeOn-time71%

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