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$320+ 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 11/22. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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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 October, booked 69 days in advance, depart on a Wednesday or Sunday and return on a Tuesday

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 November 17, 2025.

This American Airlines deal was found by Cheapflights users on 11/14. 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.
Tue 12/25:59 pmSJU - LHR
1 stop14h 01mAmerican Airlines
Wed 12/107:35 amLHR - SJU
1 stop13h 00mAmerican Airlines
Deal found 11/14$563
This United Airlines deal was found by Cheapflights users on 11/14. 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 stop14h 30mUnited Airlines
Wed 12/106:50 amLHR - SJU
2 stops18h 10mUnited Airlines
Deal found 11/14$564
This Delta deal was found by Cheapflights users on 11/14. 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.
Mon 11/173:32 pmSJU - LHR
1 stop13h 28mDelta
Wed 12/310:00 amLHR - SJU
2 stops17h 59mDelta
Deal found 11/14$571
This United Airlines deal was found by Cheapflights users on 11/16. 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 12/302:05 amSJU - LHR
1 stop15h 15mUnited Airlines
Fri 1/912:05 pmLHR - SJU
1 stop29h 12mUnited Airlines
Deal found 11/16$592
This United Airlines deal was found by Cheapflights users on 11/14. 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 11/182:20 pmSJU - LHR
1 stop14h 50mUnited Airlines
Wed 12/312:50 pmLHR - SJU
1 stop15h 46mUnited Airlines
Deal found 11/14$593
This United Airlines deal was found by Cheapflights users on 11/14. 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.
Sun 11/162:05 amSJU - LHR
1 stop15h 15mUnited Airlines
Wed 12/38:00 amLHR - SJU
2 stops18h 22mUnited Airlines
Deal found 11/14$598
This Delta deal was found by Cheapflights users on 11/14. 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.
Mon 11/177:00 amSJU - LHR
2 stops19h 50mDelta
Fri 11/289:40 amLHR - SJU
1 stop31h 35mDelta
Deal found 11/14$603
This United Airlines deal was found by Cheapflights users on 11/15. 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 11/182:05 amSJU - LHR
1 stop14h 30mUnited Airlines
Mon 11/247:30 amLHR - SJU
2 stops18h 52mUnited Airlines
Deal found 11/15$625
This Kiwi.com deal was found by Cheapflights users on 11/16. 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 12/3010:15 amSJU - LHR
1 stop17h 15mLufthansa
Wed 1/712:50 pmLHR - SJU
1 stop15h 46mLufthansa
Deal found 11/16$633

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 November 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$563
(American Airlines)

One-way from

$320
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$725
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
Search Deals
One-way flight from San Juan Luis Munoz Marin Intl to London Heathrow
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($237 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 17, 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

Tue 12/2

2:10 pm-9:10 am

1 stop15h 00m

London Heathrow

Wed 12/10

6:50 am-9:00 pm

2 stops18h 10m

$564

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 1/17

2:05 am-8:35 pm

1 stop14h 30m

London Heathrow

Sun 1/25

6:50 am-9:00 pm

2 stops18h 10m

$572

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 1/21

2:05 am-9:20 pm

1 stop15h 15m

London Heathrow

Thu 1/29

8:30 am-10:22 pm

2 stops17h 52m

$583

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/17

2:05 am-9:20 pm

1 stop15h 15m

London Heathrow

Thu 2/26

8:30 am-10:22 pm

2 stops17h 52m

$584

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/17

2:05 am-9:20 pm

1 stop15h 15m

London Heathrow

Fri 2/27

9:30 am-12:36 am

2 stops19h 06m

$584

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 12/30

2:05 am-9:20 pm

1 stop15h 15m

London Heathrow

Fri 1/9

12:05 pm-1:17 pm

1 stop29h 12m

$592

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 1/22

2:15 pm-9:00 am

1 stop14h 45m

London Heathrow

Thu 1/29

8:55 am-8:57 pm

1 stop16h 02m

$600

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 2/12

2:05 am-9:20 pm

1 stop15h 15m

London Heathrow

Sat 2/21

12:45 pm-12:36 am

1 stop15h 51m

$600

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 3/6

11:59 pm-10:00 pm

1 stop18h 01m

$326

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 11/22

7:10 am-9:35 pm

2 stops34h 25m

$359

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/15

Showing 1-10 of 17 results
1
2

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 November.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Juan Luis Munoz Marin Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 November 14, 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, September 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 $101). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $982). 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 November 17, 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 10% 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 Monday 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.

How much does it cost to fly round-trip from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

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 November 17, 2025.
Read through reviews of airlines operating flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport, such as Delta, Virgin Atlantic, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,007 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.9

Food

7.3

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
7.9
Good
8,007 reviews
Delta
7.9
Good
8,007 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.9

Food

7.3

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
7.5
Good
673 reviews
Delta
7.9
Good
8,007 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.9

Food

7.3

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
9,012 reviews
Delta
7.9
Good
8,007 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.9

Food

7.3

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
11,049 reviews
Delta
7.9
Good
8,007 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.9

Food

7.3

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
2,904 reviews
Delta
7.9
Good
8,007 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.9

Entertainment

7.9

Food

7.3

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 15h. 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 88% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport one-way?

    To fly one-way, consider booking your trip with JetBlue, which is currently one of the cheapest options available, starting at $326. United Airlines flights start at $372 while deals on Air Canada start at $378 one-way.

  • 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, September 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 $101). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of $982). 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?

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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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$729FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$546Average$737FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$605Average$1,092FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$649Average$799FlexibilityNo cancel feeOn-time69%
DeltaCheapest$652Average$859FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$654Average$840FlexibilityNo cancel feeOn-time72%
IberiaCheapest$696Average$1,288FlexibilityNo cancel feeOn-time77%

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