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$256+ Cheap flights from Luis Munoz Marin Intl (SJU) 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
Oct 31 — Nov 71
Fri 10/31
Fri 11/7
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from San Juan Luis Munoz Marin Intl to London Heathrow are usually found in September or March, booked 69 days in advance, depart on a Wednesday or Sunday and return on a Tuesday

Cheap flight deals from Luis Munoz Marin Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Luis Munoz Marin Intl (SJU) 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 October 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$615
(Virgin Atlantic)

One-way from

$256
(JetBlue)

Popular in

June

Cheapest in

September

Average price

$690
Provider with most accurate pricing for San Juan Luis Munoz Marin Intl-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for San Juan Luis Munoz Marin Intl-London Heathrow flights.
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From San Juan Luis Munoz Marin Intl to London Heathrow
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One-way flight from San Juan Luis Munoz Marin Intl to London Heathrow
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Highest demand for flights based on searches. 23% potential increase in price ($254 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Luis Munoz Marin Intl to Heathrow

Cheapest flights from Luis Munoz Marin Intl to Heathrow
Explore the most affordable flight options available from Luis Munoz Marin Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 1, 2025.

This Virgin Atlantic deal was found by Cheapflights users on 10/1. 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.
Thu 11/61:46 pmSJU - LHR
1 stop15h 14mVirgin Atlantic
Sat 11/226:20 amLHR - SJU
2 stops21h 36mVirgin Atlantic
Deal found 10/1$615
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Mon 12/12:05 amSJU - LHR
1 stop15h 15mUnited Airlines
Thu 12/117:30 amLHR - SJU
2 stops18h 52mUnited Airlines
Deal found 10/1$628
This KLM deal was found by Cheapflights users on 10/1. 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.
Sun 11/91:57 pmSJU - LHR
1 stop13h 53mKLM
Thu 11/2012:30 pmLHR - SJU
1 stop14h 43mKLM
Deal found 10/1$637
This KLM deal was found by Cheapflights users on 10/1. 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.
Tue 12/21:57 pmSJU - LHR
1 stop15h 03mKLM
Thu 12/118:55 amLHR - SJU
1 stop18h 25mKLM
Deal found 10/1$646
This Delta deal was found by Cheapflights users on 10/1. 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.
Sun 11/97:00 amSJU - LHR
1 stop20h 50mDelta
Thu 11/203:50 pmLHR - SJU
2 stops26h 20mDelta
Deal found 10/1$656
This American Airlines deal was found by Cheapflights users on 9/29. 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.
Wed 10/294:45 pmSJU - LHR
1 stop12h 30mAmerican Airlines
Tue 11/47:30 amLHR - SJU
1 stop13h 05mAmerican Airlines
Deal found 9/29$665
This American Airlines deal was found by Cheapflights users on 10/1. 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 10/294:45 pmSJU - LHR
1 stop12h 30mAmerican Airlines
Wed 11/56:15 amLHR - SJU
1 stop14h 20mAmerican Airlines
Deal found 10/1$666
This United Airlines deal was found by Cheapflights users on 9/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/115:50 pmSJU - LHR
1 stop13h 00mUnited Airlines
Wed 11/266:50 amLHR - SJU
2 stops19h 32mUnited Airlines
Deal found 9/30$667
This United Airlines deal was found by Cheapflights users on 10/1. 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 10/287:10 amSJU - LHR
2 stops19h 10mUnited Airlines
Thu 11/66:50 amLHR - SJU
2 stops19h 32mUnited Airlines
Deal found 10/1$671
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/211:05 amSJU - LHR
1 stop14h 35mUnited Airlines
Wed 10/297:30 amLHR - SJU
2 stops17h 52mUnited Airlines
Deal found 9/29$677
This United Airlines deal was found by Cheapflights users on 9/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/32:05 amSJU - LHR
1 stop15h 15mUnited Airlines
Wed 11/198:30 amLHR - SJU
2 stops20h 06mUnited Airlines
Deal found 9/30$678

Cheapflights Fare Finder

 
Customize your flight search to find flights from Luis Munoz Marin Intl 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 October 1, 2025.
Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport that are best for you.

Fly from

Luis Munoz Marin Intl

Fly to

Heathrow

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 2/12

2:05 am-7:10 am

2 stops25h 05m

London Heathrow

Sun 2/22

6:50 am-10:22 pm

2 stops19h 32m

$617

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 12/4

2:05 am-8:35 pm

1 stop14h 30m

London Heathrow

Mon 12/8

7:55 am-9:00 pm

1 stop17h 05m

$646

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

8:35 am-5:55 am

1 stop17h 20m

London Heathrow

Thu 2/26

9:10 am-10:22 pm

2 stops17h 12m

$651

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 10/28

7:10 am-6:20 am

2 stops19h 10m

London Heathrow

Thu 11/6

6:50 am-10:22 pm

2 stops19h 32m

$671

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 10/29

1:20 pm-6:20 am

1 stop13h 00m

London Heathrow

Tue 11/4

8:30 am-12:36 am

2 stops20h 06m

$677

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 10/29

4:50 pm-10:50 am

1 stop14h 00m

London Heathrow

Thu 11/6

8:30 am-12:36 am

2 stops20h 06m

$677

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 11/4

2:20 pm-8:25 am

1 stop14h 05m

London Heathrow

Tue 11/18

8:30 am-10:22 pm

2 stops17h 52m

$678

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 10/25

1:25 pm-10:30 am

1 stop16h 05m

London Heathrow

Sat 11/1

9:20 am-11:43 pm

1 stop18h 23m

$680

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 1/22

11:15 am-9:30 am

1 stop18h 15m

London Heathrow

Thu 1/29

9:20 am-11:56 pm

1 stop18h 36m

$680

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 10/22

7:00 am-5:55 am

2 stops17h 55m

London Heathrow

Wed 10/29

7:30 am-9:22 pm

2 stops17h 52m

$682

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/29

Showing 1-10 of 15 results
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Compare providers for flights from Luis Munoz Marin Intl to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Luis Munoz Marin Intl to Heathrow in October.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Juan Luis Munoz Marin Intl Airport-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Juan Luis Munoz Marin Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Juan Luis Munoz Marin Intl Airport-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Juan Luis Munoz Marin Intl Airport-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Juan Luis Munoz Marin Intl Airport-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Luis Munoz Marin Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Luis Munoz Marin Intl 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 Luis Munoz Marin Intl Airport to London Heathrow Airport

How far ahead should I book a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Luis Munoz Marin Intl to Heathrow. Price data was last updated on September 26, 2025.

The price you pay for your flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 69 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport (average of $661). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,096). 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 Luis Munoz Marin Intl 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 October 1, 2025.

One of the essential ways to save on airfare from San Juan Luis Munoz Marin Intl Airport 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 Luis Munoz Marin Intl Airport to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Luis Munoz Marin Intl to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Juan Luis Munoz Marin Intl Airport 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 October 1, 2025.
Read through reviews of airlines operating flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport, such as Delta, United Airlines, and Virgin Atlantic. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
United Airlines
7.4
Good
8,929 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Virgin Atlantic
7.4
Good
665 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
11,030 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
JetBlue
7.2
Good
2,912 reviews
Delta
8.0
Very good
7,961 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

Find useful and relevant information for your journey from Luis Munoz Marin Intl to Heathrow. 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 San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

    There are many flights that can get you from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in 25h 05m. Fly via United Airlines to get the fastest option. The distance from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport is about 4179 mi.

  • What are the cheapest airlines flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport round-trip?

    JetBlue, at $101, was found to be the cheapest airline from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport.Alternate airlines to your destination round-trip include British Airways and American Airlines. JetBlue is priced at 87% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Luis Munoz Marin Intl to Heathrow that include hotel bookings?

    Yes. In addition to deals on Luis Munoz Marin Intl to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Luis Munoz Marin Intl to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Luis Munoz Marin Intl to Heathrow.

  • Can I find deals for business class flights from Luis Munoz Marin Intl to Heathrow?

    Yes. Cheapflights offers flight deals from Luis Munoz Marin Intl to Heathrow 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 Luis Munoz Marin Intl Airport to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport (average of $661). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,096). 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 Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
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Hayes
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Harrow
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Top 7 airlines flying from Luis Munoz Marin Intl to Heathrow

Discover the top 7 airlines that operate flights from Luis Munoz Marin Intl 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 October 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$745FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$546Average$737FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$605Average$1,030FlexibilityNo cancel feeOn-time71%
DeltaCheapest$652Average$797FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$654Average$778FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$678Average$799FlexibilityNo cancel feeOn-time69%
IberiaCheapest$696Average$1,288FlexibilityNo cancel feeOn-time77%

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