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$326+ 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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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 January 8, 2026.

Round-trip from

$542
(British Airways)

One-way from

$326
(JetBlue)

Popular in

June

Cheapest in

February

Average price

$626
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. 19% potential increase in price ($188 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This British Airways deal was found by Cheapflights users on 1/7. 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.
Wed 4/221:31 pmSJU - LHR
1 stop18h 04mBritish Airways
Thu 4/308:50 amLHR - SJU
2 stops18h 15mBritish Airways
Deal found 1/7$542
This British Airways deal was found by Cheapflights users on 1/7. 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 3/96:00 amSJU - LHR
1 stop26h 05mBritish Airways
Fri 3/209:45 amLHR - SJU
1 stop29h 11mBritish Airways
Deal found 1/7$546
This United Airlines deal was found by Cheapflights users on 1/8. 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.
Tue 2/105:50 pmSJU - LHR
1 stop13h 00mUnited Airlines
Wed 2/186:50 amLHR - SJU
2 stops19h 32mUnited Airlines
Deal found 1/8$552
This British Airways deal was found by Cheapflights users on 1/8. 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.
Tue 3/316:00 amSJU - LHR
1 stop22h 00mBritish Airways
Tue 4/79:10 pmLHR - SJU
2 stops29h 55mBritish Airways
Deal found 1/8$553
This KLM deal was found by Cheapflights users on 1/8. 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.
Wed 2/183:55 pmSJU - LHR
1 stop15h 45mKLM
Thu 2/268:55 amLHR - SJU
1 stop19h 01mKLM
Deal found 1/8$555
This Delta deal was found by Cheapflights users on 1/8. 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.
Mon 2/166:37 pmSJU - LHR
1 stop13h 03mDelta
Mon 3/26:30 amLHR - SJU
2 stops21h 26mDelta
Deal found 1/8$558
This United Airlines deal was found by Cheapflights users on 1/7. 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.
Wed 2/184:52 pmSJU - LHR
1 stop14h 23mUnited Airlines
Fri 2/279:30 amLHR - SJU
2 stops19h 06mUnited Airlines
Deal found 1/7$562
This United Airlines deal was found by Cheapflights users on 1/8. 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.
Wed 2/184:52 pmSJU - LHR
1 stop14h 23mUnited Airlines
Thu 2/268:30 amLHR - SJU
2 stops17h 52mUnited Airlines
Deal found 1/8$563
This KLM deal was found by Cheapflights users on 1/7. 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.
Wed 4/221:15 pmSJU - LHR
1 stop14h 35mKLM
Thu 4/301:40 pmLHR - SJU
1 stop15h 03mKLM
Deal found 1/7$571
This Iberia deal was found by Cheapflights users on 1/6. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/225:51 pmSJU - LHR
1 stop14h 29mIberia
Thu 1/298:50 pmLHR - SJU
2 stops31h 09mIberia
Deal found 1/6$574
This British Airways deal was found by Cheapflights users on 1/7. 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.
Fri 1/236:10 pmSJU - LGW
1 stop20h 50mBritish Airways
Tue 1/2711:45 amLGW - SJU
1 stop12h 10mBritish Airways
Deal found 1/7$580
This Kiwi.com deal was found by Cheapflights users on 1/8. 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.
Mon 2/169:25 pmSJU - LGW
1 stop17h 35mMultiple Airlines
Mon 3/25:20 pmLGW - SJU
2 stops54h 46mMultiple Airlines
Deal found 1/8$615

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 January 8, 2026.
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 4/22

1:31 pm-12:35 pm

1 stop18h 04m

London Heathrow

Thu 4/30

8:50 am-10:05 pm

2 stops18h 15m

$542

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 3/31

6:00 am-9:00 am

1 stop22h 00m

London Heathrow

Tue 4/7

9:10 pm-10:05 pm

2 stops29h 55m

$553

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

2:24 pm-6:50 am

1 stop12h 26m

London Heathrow

Fri 2/27

12:30 pm-11:58 pm

1 stop15h 28m

$555

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

2:23 pm-8:35 am

1 stop14h 12m

London Heathrow

Fri 2/27

10:35 am-11:31 pm

1 stop16h 56m

$555

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

3:55 pm-11:40 am

1 stop15h 45m

London Heathrow

Thu 2/26

10:10 am-11:56 pm

1 stop17h 46m

$555

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 4/21

1:00 am-8:40 pm

1 stop14h 40m

London Heathrow

Wed 4/29

10:25 am-9:24 pm

2 stops15h 59m

$562

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/17

2:05 am-8:35 pm

1 stop14h 30m

London Heathrow

Thu 2/26

8:30 am-10:22 pm

2 stops17h 52m

$563

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Fri 1/23

6:10 pm-7:00 pm

1 stop20h 50m

London Gatwick

Tue 1/27

11:45 am-7:55 pm

1 stop12h 10m

$580

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 2/12

7:40 am-7:30 am

1 stop19h 50m

London Heathrow

Sun 2/15

6:30 am-10:22 pm

2 stops19h 52m

$588

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 2/27

4:52 pm-11:15 am

1 stop14h 23m

London Heathrow

Sat 3/7

9:30 am-12:36 am

2 stops19h 06m

$588

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 32 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, 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 $977). 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.

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 January 8, 2026.
See what other customers who have flown with Delta, United Airlines, and American 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
8,025 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Food

7.2

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
8,025 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Food

7.2

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
9,139 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Food

7.2

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
11,097 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Food

7.2

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
2,893 reviews
Delta
7.9
Good
8,025 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Crew

8.5

Food

7.2

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?

    British Airways, KLM, and Finnair can get you from Puerto Rico to London in just under 12h 26m. Your travel time can differ by up to 5h 38m. The distance from Puerto Rico to London is about 4179 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 $977). 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
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Harrow
Eastleigh
Gatwick
Dartford
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Eastbourne
Sutton

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Puerto Rico to London

Discover the top 6 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$788FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$546Average$707FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$584Average$750FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$600Average$799FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$605Average$1,005FlexibilityNo cancel feeOn-time71%
DeltaCheapest$652Average$859FlexibilityNo cancel feeOn-timeN/A

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