$340+ 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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from San Juan 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.Cheapflights Tip: The best prices from San Juan to London are usually found in September or October, booked 84 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 29, 2025.
Round-trip from | $685 (Delta) |
|---|---|
One-way from | $340 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $709 |
Find flight deals from San Juan to London
Cheapest flights from San Juan to LondonExplore 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 29, 2025.
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 29, 2025.
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.
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This KLM deal was found by Cheapflights users on 4/28. 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.
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This United Airlines deal was found by Cheapflights users on 4/28. 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.
This United deal was found by Cheapflights users on 4/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Air Canada deal was found by Cheapflights users on 4/28. 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.
This JetBlue deal was found by Cheapflights users on 4/27. 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.
This Norse deal was found by Cheapflights users on 4/28. 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.
This KLM deal was found by Cheapflights users on 4/28. 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.
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 29, 2025.
Use the filters below to find and compare flights from San Juan to London that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Sat 7/19
6:14 pm-8:00 pm
1 stop20h 46m
London Heathrow
Tue 8/19
8:10 pm-11:29 am
1 stop20h 19m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Fri 5/2
6:00 am-6:30 am
1 stop19h 30m
London Heathrow
Thu 5/22
11:55 am-1:49 am
1 stop18h 54m
San JuanLondon
SJU - LGW
SJULGW
San Juan Luis Munoz Marin Intl
Sat 7/19
7:00 am-10:00 am
1 stop22h 00m
London Gatwick
Tue 8/19
12:00 pm-11:46 pm
1 stop16h 46m
San JuanLondon
SJU - LGW
SJULGW
San Juan Luis Munoz Marin Intl
Thu 6/12
12:55 pm-9:35 am
1 stop15h 40m
London Gatwick
Thu 6/19
12:10 pm-12:49 am
1 stop17h 39m
San JuanLondon
SJU - LGW
SJULGW
San Juan Luis Munoz Marin Intl
Thu 6/5
6:20 am-6:20 am
1 stop19h 00m
London Gatwick
Mon 6/16
10:00 am-8:54 pm
1 stop15h 54m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Fri 5/2
2:40 pm-7:20 pm
2 stops23h 40m
London Heathrow
Sun 5/4
7:25 am-11:52 pm
2 stops21h 27m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Sat 7/19
7:00 am-6:20 am
2 stops18h 20m
London Heathrow
Tue 8/19
8:30 am-11:57 pm
2 stops20h 27m
San JuanLondon
SJU - LGW
SJULGW
San Juan Luis Munoz Marin Intl
Tue 7/22
1:34 pm-10:00 am
1 stop15h 26m
London Gatwick
Tue 8/5
12:00 pm-11:59 pm
1 stop16h 59m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 7/22
2:39 pm-11:10 am
1 stop15h 31m
London Heathrow
Fri 8/1
10:55 am-11:59 pm
1 stop18h 04m
San JuanLondon
SJU - LGW
SJULGW
San Juan Luis Munoz Marin Intl
Sun 7/6
6:03 am-6:35 am
2 stops19h 32m
London Gatwick
Wed 7/16
2:30 pm-11:04 am
2 stops25h 34m
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.
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 25, 2025.
The best time to book flights from San Juan to London is 44 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 29, 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 29, 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.
Entertainment
Boarding
Comfort
Food
Crew
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Crew
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Crew
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Crew
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Crew
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Crew
Overall
Reviews
Aaron,Oct 2024
LAX - LHR
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.
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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 29, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$622 | Average$781 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$639 | Average$1,010 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$649 | Average$758 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$651 | Average$780 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$652 | Average$780 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$654 | Average$820 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$691 | Average$926 | FlexibilityNo cancel fee | On-time71% |