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$315+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Round-trip from

$656
(American Airlines)

One-way from

$315
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$842
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. 15% potential increase in price ($147 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/111:55 amSJU - LHR
1 stop16h 30mAmerican Airlines
Sat 10/117:35 amLHR - SJU
1 stop12h 35mAmerican Airlines
Deal found 4/30$656
This British Airways deal was found by Cheapflights users on 4/30. 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.
Mon 8/251:35 pmSJU - LHR
1 stop16h 00mBritish Airways
Mon 9/86:15 amLHR - SJU
1 stop17h 15mBritish Airways
Deal found 4/30$659
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/21:25 pmSJU - LHR
1 stop12h 20mDelta
Tue 9/99:20 amLHR - SJU
1 stop17h 48mDelta
Deal found 4/30$660
This JetBlue deal was found by Cheapflights users on 4/29. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/158:55 pmSJU - LHR
1 stop19h 50mJetBlue
Thu 11/278:25 amLHR - SJU
1 stop18h 35mJetBlue
Deal found 4/29$661
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/134:05 pmSJU - LHR
1 stop13h 15mMultiple Airlines
Mon 10/208:00 pmLHR - SJU
1 stop24h 10mMultiple Airlines
Deal found 4/30$673
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2312:56 pmSJU - LGW
2 stops16h 04mDelta
Fri 9/512:00 pmLGW - SJU
1 stop16h 46mDelta
Deal found 4/30$695
This KLM deal was found by Cheapflights users on 4/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/113:28 pmSJU - LHR
1 stop15h 07mKLM
Thu 11/2010:00 amLHR - SJU
2 stops17h 50mKLM
Deal found 4/29$712
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 10/61:05 amSJU - LHR
1 stop14h 35mUnited Airlines
Sun 10/199:30 amLHR - SJU
2 stops19h 27mUnited Airlines
Deal found 4/30$718
This KLM deal was found by Cheapflights users on 4/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/21:34 pmSJU - LGW
1 stop15h 26mKLM
Sun 8/1712:00 pmLGW - SJU
1 stop16h 46mKLM
Deal found 4/30$732
This Air Canada deal was found by Cheapflights users on 4/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/281:05 amSJU - LHR
2 stops26h 05mAir Canada
Fri 11/76:00 pmLHR - SJU
2 stops34h 36mAir Canada
Deal found 4/29$741
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/192:05 pmSJU - LGW
1 stop35h 50mMultiple Airlines
Mon 6/2310:00 amLGW - SJU
1 stop15h 54mMultiple Airlines
Deal found 4/30$768
This Air France deal was found by Cheapflights users on 4/30. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3012:43 pmSJU - LGW
1 stop16h 17mAir France
Sun 9/712:00 pmLGW - SJU
1 stop16h 46mAir France
Deal found 4/30$791

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 May 1, 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

Wed 10/1

11:55 am-9:25 am

1 stop16h 30m

London Heathrow

Sat 10/11

7:35 am-3:10 pm

1 stop12h 35m

$656

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 8/25

1:35 pm-10:35 am

1 stop16h 00m

London Heathrow

Mon 9/8

6:15 am-6:30 pm

1 stop17h 15m

$659

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 9/2

1:25 pm-6:45 am

1 stop12h 20m

London Heathrow

Tue 9/9

9:20 am-10:08 pm

1 stop17h 48m

$660

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 9/24

3:15 am-8:45 pm

1 stop12h 30m

London Heathrow

Fri 10/10

11:55 am-1:45 am

1 stop18h 50m

$671

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 10/13

4:05 pm-10:20 am

1 stop13h 15m

London Heathrow

Mon 10/20

8:00 pm-3:10 pm

1 stop24h 10m

$673

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Sat 8/23

12:56 pm-10:00 am

2 stops16h 04m

London Gatwick

Fri 9/5

12:00 pm-11:46 pm

1 stop16h 46m

$695

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 8/27

2:39 pm-11:10 am

1 stop15h 31m

London Heathrow

Tue 9/9

9:55 am-10:08 pm

2 stops17h 13m

$712

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 10/6

1:05 am-8:40 pm

1 stop14h 35m

London Heathrow

Sun 10/19

9:30 am-11:57 pm

2 stops19h 27m

$718

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Sat 8/2

1:34 pm-10:00 am

1 stop15h 26m

London Gatwick

Sun 8/17

12:00 pm-11:46 pm

1 stop16h 46m

$732

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Thu 6/19

2:05 pm-6:55 am

1 stop35h 50m

London Gatwick

Mon 6/23

10:00 am-8:54 pm

1 stop15h 54m

$768

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 39 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 $1,103). 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 May 1, 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.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 May 1, 2025.
See what other customers who have flown with Delta, KLM and Air France 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
7,934 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,446 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
643 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    $415 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $456 and $460, 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 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, 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 $1,103). 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 Puerto Rico?

Book flights to Puerto Rico if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Luton
Horley
Canterbury
Harrow
Wembley
Dover
Gatwick
Orpington
Watford
Croydon
Borehamwood
Folkestone
Ilford
Aylesbury
Sutton
Chelmsford
Brentwood

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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$622Average$781FlexibilityNo cancel feeOn-time62%
IberiaCheapest$639Average$1,010FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$649Average$758FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$651Average$780FlexibilityNo cancel feeOn-time70%
DeltaCheapest$652Average$780FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$654Average$820FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$691Average$926FlexibilityNo cancel feeOn-time71%

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