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$285+ 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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
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

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 August 18, 2025.

Round-trip from

$667
(Expedia)

One-way from

$285
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$807
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. 22% potential increase in price ($241 potential increase over avg. RT price).
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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 August 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 August 18, 2025.

This Expedia deal was found by Cheapflights users on 8/17. 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.
Wed 10/112:01 pmSJU - LHR
1 stop13h 54mBritish Airways
Wed 10/86:15 amLHR - SJU
1 stop17h 15mBritish Airways
Deal found 8/17$667
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/301:05 amSJU - LHR
1 stop14h 35mUnited Airlines
Wed 10/81:30 pmLHR - SJU
2 stops28h 04mUnited Airlines
Deal found 8/17$686
This JetBlue deal was found by Cheapflights users on 8/17. 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.
Wed 9/241:25 pmSJU - LHR
1 stop15h 05mJetBlue
Wed 10/18:15 amLHR - SJU
1 stop13h 40mJetBlue
Deal found 8/17$689
This United Airlines deal was found by Cheapflights users on 8/17. 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 9/231:05 amSJU - LHR
1 stop14h 35mUnited Airlines
Wed 10/11:00 pmLHR - SJU
1 stop15h 57mUnited Airlines
Deal found 8/17$698
This British Airways deal was found by Cheapflights users on 8/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:55 pmSJU - LHR
1 stop13h 40mBritish Airways
Sat 10/117:35 amLHR - SJU
1 stop15h 55mBritish Airways
Deal found 8/16$699
This United deal was found by Cheapflights users on 8/17. 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.
Wed 9/241:25 pmSJU - LHR
2 stops16h 15mMultiple Airlines
Wed 10/19:30 amLHR - SJU
2 stops19h 27mMultiple Airlines
Deal found 8/17$703
This Delta deal was found by Cheapflights users on 8/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:15 amSJU - LHR
2 stops21h 30mDelta
Thu 11/63:50 pmLHR - SJU
2 stops26h 22mDelta
Deal found 8/16$718
This United Airlines deal was found by Cheapflights users on 8/16. 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 10/74:55 pmSJU - LHR
1 stop12h 45mUnited Airlines
Sun 10/194:40 pmLHR - SJU
2 stops26h 05mUnited Airlines
Deal found 8/16$721
This United deal was found by Cheapflights users on 8/15. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/102:05 amSJU - LHR
1 stop14h 30mMultiple Airlines
Sat 11/2211:10 amLHR - SJU
1 stop31h 40mMultiple Airlines
Deal found 8/15$722
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Thu 9/181:05 amSJU - LHR
1 stop14h 35mUnited Airlines
Fri 9/261:00 pmLHR - SJU
1 stop15h 57mUnited Airlines
Deal found 8/17$730
This American Airlines deal was found by Cheapflights users on 8/17. 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.
Sat 9/61:40 pmSJU - LHR
1 stop15h 55mAmerican Airlines
Sat 9/137:35 amLHR - SJU
1 stop12h 35mAmerican Airlines
Deal found 8/17$731
This American Airlines deal was found by Cheapflights users on 8/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/241:37 pmSJU - LHR
1 stop14h 48mAmerican Airlines
Mon 9/296:35 amLHR - SJU
2 stops16h 55mAmerican Airlines
Deal found 8/16$732

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 August 18, 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 10/21

11:56 am-6:55 am

1 stop13h 59m

London Heathrow

Tue 10/28

11:25 am-7:55 pm

1 stop12h 30m

$667

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 10/1

12:01 pm-6:55 am

1 stop13h 54m

London Heathrow

Wed 10/8

6:15 am-6:30 pm

1 stop17h 15m

$667

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 9/23

1:05 am-8:40 pm

1 stop14h 35m

London Heathrow

Wed 10/1

1:30 pm-12:34 pm

2 stops28h 04m

$686

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 11/19

8:30 am-7:10 am

2 stops18h 40m

London Heathrow

Wed 12/3

7:30 am-10:22 pm

2 stops18h 52m

$686

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 10/21

1:30 pm-7:15 am

1 stop12h 45m

London Heathrow

Tue 10/28

9:30 am-11:36 pm

2 stops18h 06m

$686

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 10/1

1:30 pm-7:15 am

1 stop12h 45m

London Heathrow

Wed 10/8

1:30 pm-12:34 pm

2 stops28h 04m

$686

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 10/29

3:52 pm-11:15 am

1 stop15h 23m

London Heathrow

Thu 11/6

6:30 am-12:36 am

2 stops22h 06m

$686

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 11/11

8:30 am-7:10 am

2 stops18h 40m

London Heathrow

Thu 11/20

8:30 am-10:22 pm

2 stops17h 52m

$686

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 10/2

10:57 am-12:45 pm

2 stops20h 48m

$285

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 10/3

7:50 pm-10:20 am

2 stops33h 30m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 15 results
1
2

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 August 8, 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 $1,097). 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 August 18, 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 August 18, 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
7,981 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
8,925 reviews
Delta
8.0
Very good
7,981 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
657 reviews
Delta
8.0
Very good
7,981 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
10,000 reviews
Delta
8.0
Very good
7,981 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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
2,915 reviews
Delta
8.0
Very good
7,981 reviews

Crew

8.5

Entertainment

7.9

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

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.

  • 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 $1,097). 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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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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$764FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$625Average$887FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$637Average$1,024FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$649Average$799FlexibilityNo cancel feeOn-time69%
DeltaCheapest$652Average$797FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$654Average$778FlexibilityNo cancel feeOn-time72%
IberiaCheapest$696Average$1,288FlexibilityNo cancel feeOn-time77%

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