$318+ 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 7/25. 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 30, 2025.
Round-trip from | $669 (American Airlines) |
|---|---|
One-way from | $318 (Kiwi.com) |
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 30, 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 30, 2025.
This American Airlines deal was found by Cheapflights users on 6/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Expedia deal was found by Cheapflights users on 6/30. 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 Expedia 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 6/27. 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 Airlines 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 6/27. 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 Orbitz deal was found by Cheapflights users on 6/28. 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 Orbitz 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 6/30. 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 Lufthansa 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 6/28. 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 Delta deal was found by Cheapflights users on 6/30. 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.
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 30, 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
Wed 9/24
1:36 pm-9:25 am
1 stop14h 49m
London Heathrow
Wed 10/8
6:15 am-3:10 pm
1 stop13h 55m
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
8:00 pm-6:15 pm
2 stops27h 15m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 8/12
3:05 am-8:45 pm
1 stop12h 40m
London Heathrow
Wed 8/20
8:15 am-12:14 am
1 stop20h 59m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 8/12
1:25 pm-10:40 am
2 stops16h 15m
London Heathrow
Tue 8/19
1:00 pm-11:57 pm
1 stop15h 57m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 9/24
3:55 pm-9:25 am
1 stop12h 30m
London Heathrow
Wed 10/1
6:15 am-3:10 pm
1 stop13h 55m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Wed 9/24
1:05 am-9:35 am
2 stops27h 30m
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
Sun 8/3
1:26 pm-6:45 am
1 stop12h 19m
London Heathrow
Tue 8/19
8:10 pm-4:36 pm
2 stops25h 26m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Tue 9/23
1:59 am-6:30 am
3 stops23h 31m
London Heathrow
Wed 10/1
2:05 pm-1:58 pm
3 stops28h 53m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Fri 7/25
9:30 pm-3:35 pm
2 stops37h 05m
San JuanLondon
SJU - LHR
SJULHR
San Juan Luis Munoz Marin Intl
Fri 8/22
3:05 am-8:45 pm
1 stop12h 40m
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 27, 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 $1,098). 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 30, 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.
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 30, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and United Airlines from San Juan to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
Comfort
Boarding
Entertainment
Crew
Food
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Comfort
Boarding
Entertainment
Crew
Food
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Comfort
Boarding
Entertainment
Crew
Food
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Comfort
Boarding
Entertainment
Crew
Food
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Comfort
Boarding
Entertainment
Crew
Food
Reviews
Aaron,Oct 2024
LAX - LHR
Overall
Comfort
Boarding
Entertainment
Crew
Food
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 30, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$622 | Average$777 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$632 | Average$1,200 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$649 | Average$795 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$651 | Average$887 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$652 | Average$797 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$654 | Average$820 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$654 | Average$1,030 | FlexibilityNo cancel fee | On-time71% |