$284+ Cheap flights from San Juan to Heathrow (LHR)
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 7/31. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from San Juan to Heathrow 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 Heathrow are usually found in October or February, booked 34 days in advance, depart on a Wednesday or Sunday and return on a Tuesday
Cheap flight deals from San Juan to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to Heathrow (LHR). 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 June 12, 2025.
Round-trip from | $648 (JetBlue) |
|---|---|
One-way from | $284 (Mytrip) |
Popular in | June |
Cheapest in | October |
Average price | $1,185 |
Find flight deals from San Juan to Heathrow
Cheapest flights from San Juan to HeathrowExplore the most affordable flight options available from San Juan to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
Explore the most affordable flight options available from San Juan to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
This JetBlue deal was found by Cheapflights users on 6/12. 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 British Airways deal was found by Cheapflights users on 6/10. 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 Iberia deal was found by Cheapflights users on 6/11. 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.
This United Airlines deal was found by Cheapflights users on 6/10. 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 American Airlines deal was found by Cheapflights users on 6/11. 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 6/10. 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 KLM deal was found by Cheapflights users on 6/11. 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 6/12. 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 TAP AIR PORTUGAL deal was found by Cheapflights users on 6/11. 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.
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Lufthansa deal was found by Cheapflights users on 6/10. 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 Lufthansa 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 Heathrow 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 June 12, 2025.
Use the filters below to find and compare flights from San Juan to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 10/28
12:59 am-8:45 pm
1 stop15h 46m
London Heathrow
Thu 11/6
12:20 pm-2:45 am
1 stop18h 25m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 9/24
1:36 pm-9:25 am
1 stop14h 49m
London Heathrow
Wed 10/1
7:50 am-6:30 pm
1 stop15h 40m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 8/5
6:04 am-9:25 am
1 stop22h 21m
London Heathrow
Wed 1/28
6:15 am-4:30 pm
1 stop14h 15m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 11/18
8:30 am-7:10 am
2 stops18h 40m
London Heathrow
Wed 11/26
8:30 am-12:36 am
2 stops20h 06m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 9/10
4:42 pm-12:45 pm
1 stop15h 03m
London Heathrow
Thu 9/18
7:45 am-6:35 pm
2 stops15h 50m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Thu 9/25
6:40 pm-6:30 am
2 stops30h 50m
London Heathrow
Fri 10/10
5:40 pm-11:57 pm
2 stops35h 17m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Fri 8/22
1:16 pm-6:45 am
1 stop12h 29m
London Heathrow
Mon 9/1
10:55 am-11:51 pm
1 stop17h 56m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 10/29
2:28 pm-12:15 pm
2 stops17h 47m
London Heathrow
Fri 11/7
12:30 pm-11:17 pm
1 stop14h 47m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 11/18
7:10 am-12:40 pm
2 stops25h 30m
London Heathrow
Wed 11/26
6:00 am-4:20 am
2 stops26h 20m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 10/29
6:45 am-5:55 am
2 stops19h 10m
London Heathrow
Fri 11/7
6:50 am-10:22 pm
2 stops19h 32m
Best time to book a flight from San Juan to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Juan with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from San Juan to London Heathrow Airport
How far ahead should I book a flight from San Juan to London Heathrow Airport?
Use this chart to determine the optimal time to book a round-trip flight from San Juan to Heathrow. Price data was last updated on June 9, 2025.
To ensure you get the cheapest price possible for a flight from San Juan to London Heathrow Airport, you should look to book at least 34 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from San Juan to London Heathrow Airport?
Currently, November is the cheapest month in which you can book a flight from San Juan to London Heathrow Airport (average of $661). Flying from San Juan to London Heathrow Airport in June is currently the most expensive (average of $1,108). 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 LHR?
Find hourly flight availability from San Juan to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
One of the essential ways to save on airfare from San Juan to London Heathrow Airport is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.
What is the cheapest day to fly from San Juan to London Heathrow Airport?
Use this chart to determine the cheapest time to fly round-trip from San Juan to Heathrow. Price data was last updated on December 16, 2024.
Travelers seeking maximum savings on their San Juan to London Heathrow Airport flight should consider departing on Thursday evenings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Rainfall in Heathrow by month
Plan your trip to Heathrow by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 1.6 in.
Temperature in Heathrow by month
Plan your trip to Heathrow by taking into account the average temperature totals by month.
If weather is an important factor for your trip to London Heathrow Airport, 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 Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated June 12, 2025.
See what other customers who have flown with Delta, KLM and United Airlines from San Juan to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Aaron,Oct 2024
LAX - LHR
Entertainment
Boarding
Comfort
Food
Overall
Crew
Reviews
Aaron,Oct 2024
LAX - LHR
Related info for your journey
Find useful and relevant information for your journey from San Juan to Heathrow. 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 Heathrow
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from San Juan to Heathrow
Discover the top 7 airlines that operate flights from San Juan to Heathrow. 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 June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$622 | Average$775 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$639 | Average$1,200 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$649 | Average$795 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$651 | Average$780 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$652 | Average$797 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$654 | Average$840 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$681 | Average$1,005 | FlexibilityNo cancel fee | On-time71% |