London

$284+ Cheap flights from San Juan 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 7/11. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LON
Apr 29 — May 61
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Cheapflights Tip: The best prices from San Juan to London are usually found in September or October, booked 70 days in advance, depart on a Wednesday or Monday and return on a Tuesday

Cheap flight deals from San Juan to London

Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 24, 2025.

Round-trip from

$675
(JetBlue)

One-way from

$284
(Norse)

Popular in

June

Cheapest in

September

Average price

$709
From San Juan to London (LON)
One-way flight from San Juan to London (LON)
Highest demand for flights based on searches. 15% potential increase in price ($143 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Average for round-trip flights in April 2025

Find flight deals from San Juan to London

Cheapest flights from San Juan to London
Explore the most affordable flight options available from San Juan to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

This JetBlue deal was found by Cheapflights users on 4/22. 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.
Wed 4/306:00 amSJU - LHR
1 stop19h 30mJetBlue
Tue 5/68:25 amLHR - SJU
1 stop14h 40mJetBlue
Deal found 4/22$660
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 4/292:40 pmSJU - LGW
2 stops19h 00mMultiple Airlines
Tue 5/610:00 amLGW - SJU
1 stop29h 53mMultiple Airlines
Deal found 4/22$701
This American Airlines deal was found by Cheapflights users on 4/22. 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 8/2012:05 pmSJU - LHR
1 stop13h 50mAmerican Airlines
Wed 9/106:15 amLHR - SJU
1 stop17h 15mAmerican Airlines
Deal found 4/22$704
This KLM deal was found by Cheapflights users on 4/22. 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 8/272:39 pmSJU - LHR
1 stop15h 31mKLM
Tue 9/99:55 amLHR - SJU
2 stops17h 13mKLM
Deal found 4/22$712
This United Airlines deal was found by Cheapflights users on 4/22. 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 8/261:05 amSJU - LHR
1 stop14h 35mUnited Airlines
Tue 9/98:30 amLHR - SJU
2 stops20h 27mUnited Airlines
Deal found 4/22$725
This Air France deal was found by Cheapflights users on 4/22. 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.
Mon 9/112:43 pmSJU - LGW
1 stop16h 17mAir France
Sun 9/712:00 pmLGW - SJU
1 stop16h 46mAir France
Deal found 4/22$725
This British Airways deal was found by Cheapflights users on 4/22. 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.
Sun 8/244:05 pmSJU - LHR
1 stop13h 30mBritish Airways
Mon 9/86:15 amLHR - SJU
1 stop17h 15mBritish Airways
Deal found 4/22$736
This Delta deal was found by Cheapflights users on 4/22. 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.
Wed 8/202:39 pmSJU - LHR
2 stops15h 46mDelta
Wed 9/109:35 amLHR - SJU
2 stops17h 33mDelta
Deal found 4/22$743
This Virgin Atlantic deal was found by Cheapflights users on 4/22. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:15 amSJU - LHR
1 stop23h 55mVirgin Atlantic
Tue 5/68:40 amLHR - SJU
2 stops20h 08mVirgin Atlantic
Deal found 4/22$785
This Delta deal was found by Cheapflights users on 4/22. 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 8/212:56 pmSJU - LGW
2 stops16h 04mDelta
Sun 8/1712:00 pmLGW - SJU
1 stop16h 46mDelta
Deal found 4/22$841
This TAP AIR PORTUGAL deal was found by Cheapflights users on 4/23. 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.
Tue 11/112:05 pmSJU - LHR
2 stops23h 25mTAP AIR PORTUGAL
Thu 11/2012:25 pmLHR - SJU
2 stops18h 52mTAP AIR PORTUGAL
Deal found 4/23$866
This Mytrip deal was found by Cheapflights users on 4/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/292:40 pmSJU - LHR
2 stops24h 40mMultiple Airlines
Tue 5/67:40 amLHR - SJU
3 stops32h 05mMultiple Airlines
Deal found 4/22$869

Cheapflights Fare Finder

Customize your flight search to find flights from San Juan 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 April 24, 2025.
Use the filters below to find and compare flights from San Juan to London that are best for you.

Fly from

San Juan

Fly to

London

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 9/25

12:55 pm-6:30 am

1 stop12h 35m

London Heathrow

Fri 10/10

11:55 am-1:45 am

1 stop18h 50m

$675

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 8/20

12:05 pm-6:55 am

1 stop13h 50m

London Heathrow

Wed 9/10

6:15 am-6:30 pm

1 stop17h 15m

$704

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 - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Mon 5/5

9:30 pm-6:20 am

1 stop27h 50m

London Gatwick

Mon 5/12

10:00 am-10:53 am

1 stop29h 53m

$716

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 8/26

1:05 am-8:40 pm

1 stop14h 35m

London Heathrow

Tue 9/9

1:00 pm-11:57 pm

1 stop15h 57m

$725

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Mon 9/1

12:43 pm-10:00 am

1 stop16h 17m

London Gatwick

Sun 9/7

12:00 pm-11:46 pm

1 stop16h 46m

$725

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 8/24

4:05 pm-10:35 am

1 stop13h 30m

London Heathrow

Mon 9/8

6:15 am-6:30 pm

1 stop17h 15m

$736

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 8/20

2:39 pm-11:25 am

2 stops15h 46m

London Heathrow

Wed 9/10

9:35 am-10:08 pm

2 stops17h 33m

$743

San JuanLondon

SJU - LGW

SJULGW

San Juan Luis Munoz Marin Intl

Sat 8/2

12:56 pm-10:00 am

2 stops16h 04m

London Gatwick

Sun 8/17

12:00 pm-11:46 pm

1 stop16h 46m

$841

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 9/4

1:25 pm-12:50 pm

2 stops18h 25m

London Heathrow

Thu 9/18

9:30 am-11:57 pm

2 stops19h 27m

$883

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 34 results
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Best time to book a flight from San Juan to London

Have a flexible travel schedule? Discover the best time to fly to London from San Juan 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 San Juan to London

How far ahead should I book a flight from San Juan to London?

Use this chart to determine the optimal time to book a round-trip flight from San Juan to London. Price data was last updated on April 18, 2025.

The best time to book flights from San Juan to London is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from San Juan to London?

Currently, November is the cheapest month in which you can book a flight from San Juan to London (average of $661). Flying from San Juan to London in June is currently the most expensive (average of $1,110). 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 SJU to LON?

Find hourly flight availability from San Juan 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 April 24, 2025.

It’s typically best to fly out from San Juan to London at noon. Doing so could potentially save you 11% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from San Juan to London?

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

Travelers seeking maximum savings on their San Juan to London flight should consider departing on Sunday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 April 24, 2025.
See what other customers who have flown with Delta, KLM and Air France from San Juan to London have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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.
8.0
Very good
8.0
Very good

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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.
8.0
Very good

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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.
8.0
Very good

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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.
8.0
Very good

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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.
8.0
Very good

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Crew

8.5

Boarding

8.2

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 San Juan 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 flying from San Juan to London round-trip?

    Cheapflights users have booked flights from San Juan to London round-trip from $675. Other airlines that can offer you cheap pricing are American Airlines, from $704, and KLM, from $712. JetBlue is currently priced 15% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from San Juan to London one-way?

    The cheapest airlines for a one-way flight from San Juan to London are JetBlue ($396), Delta ($460), and United Airlines ($464).

  • Can I find deals for flights from San Juan to London that include hotel bookings?

    Yes. In addition to deals on San Juan to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Juan to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Juan to London.

  • Can I find deals for business class flights from San Juan to London?

    Yes. Cheapflights offers flight deals from San Juan 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 San Juan to London?

    Currently, November is the cheapest month in which you can book a flight from San Juan to London (average of $661). Flying from San Juan to London in June is currently the most expensive (average of $1,110). 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 San Juan?

Book flights to San Juan 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
Chelmsford
Sutton
Brentwood

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Juan to London

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from San Juan to London

Discover the top 7 airlines that operate flights from San Juan 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 April 24, 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$797FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$654Average$750FlexibilityNo cancel feeOn-time72%
American AirlinesCheapest$685Average$922FlexibilityNo cancel feeOn-time71%

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