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$276+ 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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
Mar 13 — Mar 201
Thu 3/13
Thu 3/20
1 adult, Economy
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1. Tell us where you want to go
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The best prices from San Juan Luis Munoz Marin Intl to London Heathrow are usually found in March or February, booked 26 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 March 8, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$647
(KLM)

One-way from

$276
(JetBlue)

Popular in

June

Cheapest in

March

Average price

$665
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. 16% potential increase in price ($154 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 8, 2025.

This Air Canada deal was found by Cheapflights users on 3/5. 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.
Tue 10/281:05 amSJU - LHR
2 stops26h 05mAir Canada
Fri 11/72:30 pmLHR - SJU
2 stops28h 15mAir Canada
Deal found 3/5$646
This KLM deal was found by Cheapflights users on 3/6. 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.
Mon 5/191:12 pmSJU - LHR
1 stop14h 38mKLM
Thu 5/291:05 pmLHR - SJU
1 stop14h 42mKLM
Deal found 3/6$647
This JetBlue deal was found by Cheapflights users on 3/6. 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.
Sun 3/169:45 pmSJU - LHR
1 stop19h 00mJetBlue
Tue 3/257:25 amLHR - SJU
1 stop16h 10mJetBlue
Deal found 3/6$650
This United Airlines deal was found by Cheapflights users on 3/6. 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 4/291:05 amSJU - LHR
1 stop14h 35mUnited Airlines
Tue 5/62:05 pmLHR - SJU
2 stops28h 40mUnited Airlines
Deal found 3/6$651
This Delta deal was found by Cheapflights users on 3/7. 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 5/191:39 pmSJU - LHR
1 stop13h 26mDelta
Thu 5/2910:55 amLHR - SJU
2 stops16h 52mDelta
Deal found 3/7$659
This American Airlines deal was found by Cheapflights users on 3/7. 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 9/1011:55 amSJU - LHR
1 stop14h 00mAmerican Airlines
Thu 9/186:30 amLHR - SJU
2 stops17h 00mAmerican Airlines
Deal found 3/7$660
This British Airways deal was found by Cheapflights users on 3/6. 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.
Thu 5/81:35 pmSJU - LHR
1 stop13h 30mBritish Airways
Thu 5/2912:30 pmLHR - SJU
1 stop15h 00mBritish Airways
Deal found 3/6$667
This Aeromexico deal was found by Cheapflights users on 3/6. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/241:16 pmSJU - LHR
1 stop17h 54mAir France
Mon 3/317:45 pmLHR - SJU
2 stops32h 31mAir France
Deal found 3/6$692
This Lufthansa deal was found by Cheapflights users on 3/5. 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.
Wed 3/121:10 pmSJU - LHR
2 stops25h 35mLufthansa
Tue 3/189:30 amLHR - SJU
2 stops18h 06mLufthansa
Deal found 3/5$794
This Mytrip deal was found by Cheapflights users on 3/5. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1112:30 amSJU - LHR
3 stops30h 20mMultiple Airlines
Wed 3/1912:15 pmLHR - SJU
3 stops33h 05mMultiple Airlines
Deal found 3/5$859

Find flights from Luis Munoz Marin Intl to Heathrow within your budget

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 March 8, 2025.

Fly from

Luis Munoz Marin Intl

Fly to

Heathrow

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 5/19

1:12 pm-8:50 am

1 stop14h 38m

London Heathrow

Thu 5/29

1:05 pm-10:47 pm

1 stop14h 42m

$647

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 4/29

1:05 am-8:40 pm

1 stop14h 35m

London Heathrow

Tue 5/6

3:20 pm-11:57 pm

1 stop13h 37m

$651

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 4/3

12:52 am-8:45 pm

1 stop14h 53m

London Heathrow

Fri 4/11

8:25 am-12:06 am

1 stop20h 41m

$654

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 5/19

1:39 pm-8:05 am

1 stop13h 26m

London Heathrow

Thu 5/29

10:55 am-10:47 pm

2 stops16h 52m

$659

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 5/8

1:35 pm-8:05 am

1 stop13h 30m

London Heathrow

Thu 5/29

12:30 pm-10:30 pm

1 stop15h 00m

$667

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 3/24

1:16 pm-11:10 am

1 stop17h 54m

London Heathrow

Mon 3/31

7:45 pm-11:16 pm

2 stops32h 31m

$692

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 4/10

1:05 am-9:00 pm

2 stops38h 55m

London Heathrow

Sat 4/19

12:05 pm-1:50 pm

1 stop30h 45m

$720

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 4/3

3:05 am-11:55 am

2 stops27h 50m

London Heathrow

Fri 4/11

7:40 am-11:52 pm

3 stops21h 12m

$912

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 8/5

3:00 pm-10:55 am

1 stop14h 55m

London Heathrow

Tue 8/12

7:55 am-6:30 pm

2 stops15h 35m

$929

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 3/16

9:45 pm-8:45 pm

1 stop19h 00m

$276

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 16 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 March.
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.

Travel insights for flights from Luis Munoz Marin Intl to Heathrow

Get recent, data-driven insights about flights from Luis Munoz Marin Intl to Heathrow including ideal travel times, pricing trends, and more.

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 February 28, 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 26 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 $1,128). 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 March 8, 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.

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 March 8, 2025.
To help decide which airline to fly from San Juan to London, see what other customers have to say about Delta, KLM and Air France. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,024 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,024 reviews
Delta
8.0
Very good
8,024 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,322 reviews
Delta
8.0
Very good
8,024 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Air France
7.4
Good
1,431 reviews
Delta
8.0
Very good
8,024 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,649 reviews
Delta
8.0
Very good
8,024 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

JetBlue
7.3
Good
2,986 reviews
Delta
8.0
Very good
8,024 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Boarding

8.2

Crew

8.5

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    KLM, at $647, 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 United Airlines and JetBlue. KLM is priced at 20% 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 $276. United Airlines flights start at $452 while deals on Air Canada start at $603 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, 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 $1,128). 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 San Juan Luis Munoz Marin Intl Airport?

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Luton
Wembley
Harrow
Horley
Canterbury
Northampton
Gatwick
Milton Keynes
Dover
Orpington
Watford
Stratford-upon-Avon
Croydon
Borehamwood
Bromley
Folkestone
Ilford

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Luis Munoz Marin Intl to Heathrow

Discover the top 6 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 March 8, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$587Average$855FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$622Average$786FlexibilityNo cancel feeOn-time62%
IberiaCheapest$639Average$1,242FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$651Average$780FlexibilityNo cancel feeOn-time70%
DeltaCheapest$651Average$797FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$654Average$820FlexibilityNo cancel feeOn-time72%
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