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$288+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
Jan 31 — Feb 71
Sat 1/31
Sat 2/7
1 adult, Economy
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Cheap 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 January 1, 2026.

This JetBlue deal was found by Cheapflights users on 12/30. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3011:40 amSJU - LHR
1 stop17h 50mJetBlue
Wed 1/77:25 amLHR - SJU
1 stop14h 29mJetBlue
Deal found 12/30$1,087
This Delta deal was found by Cheapflights users on 12/30. 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.
Tue 12/306:01 pmSJU - LHR
1 stop22h 09mDelta
Wed 1/78:00 pmLHR - SJU
2 stops25h 17mDelta
Deal found 12/30$1,643
This Air Canada deal was found by Cheapflights users on 12/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:15 pmSJU - LHR
2 stops39h 05mAir Canada
Wed 1/712:00 pmLHR - SJU
2 stops30h 40mAir Canada
Deal found 12/30$1,679
This Cathay Pacific deal was found by Cheapflights users on 12/30. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:10 amSJU - LHR
2 stops41h 15mMultiple Airlines
Wed 1/77:20 amLHR - SJU
3 stops40h 06mMultiple Airlines
Deal found 12/30$12,553

Find 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 January 1, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$576
(Iberia)

One-way from

$288
(Trip.com)

Popular in

June

Cheapest in

September

Average price

$762
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. 22% potential increase in price ($245 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 January 2026
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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 January 1, 2026.
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

Sat 1/31

4:52 pm-11:15 am

1 stop14h 23m

London Heathrow

Sun 2/8

6:50 am-10:22 pm

2 stops19h 32m

$577

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

2:10 pm-8:25 am

1 stop14h 15m

London Heathrow

Fri 2/27

8:30 am-12:36 am

2 stops20h 06m

$588

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 2/14

2:05 am-8:35 pm

1 stop14h 30m

London Heathrow

Sun 2/22

9:30 am-6:11 am

2 stops24h 41m

$588

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 4/22

7:20 am-6:55 am

1 stop18h 35m

London Heathrow

Thu 4/30

6:50 am-12:34 pm

2 stops34h 44m

$592

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 2/14

10:15 am-7:55 am

2 stops17h 40m

London Heathrow

Sat 2/21

7:30 am-10:22 pm

2 stops18h 52m

$592

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 4/14

6:15 am-6:45 am

1 stop19h 30m

London Heathrow

Wed 4/29

6:30 am-11:43 pm

2 stops22h 13m

$599

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 2/15

2:24 pm-6:50 am

1 stop12h 26m

London Heathrow

Sun 2/22

10:45 am-11:58 pm

1 stop17h 13m

$605

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 4/15

5:15 pm-1:15 pm

1 stop15h 00m

London Heathrow

Wed 4/29

11:45 am-11:43 pm

1 stop16h 58m

$612

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 3/31

3:40 pm-11:05 am

1 stop14h 25m

London Heathrow

Tue 4/7

12:30 pm-10:05 pm

1 stop14h 35m

$621

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 4/13

7:20 am-6:55 am

1 stop18h 35m

London Heathrow

Thu 4/30

8:00 am-8:34 pm

1 stop17h 34m

$621

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/30

Showing 1-10 of 15 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 January.
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 December 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, 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.

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 January 1, 2026.
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
8,013 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

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
8,013 reviews
Delta
7.9
Good
8,013 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

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
678 reviews
Delta
7.9
Good
8,013 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

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
9,128 reviews
Delta
7.9
Good
8,013 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

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
11,070 reviews
Delta
7.9
Good
8,013 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

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
2,903 reviews
Delta
7.9
Good
8,013 reviews

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.2

Entertainment

7.8

Boarding

8.1

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 14h 23m. 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 Virgin Atlantic. 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, 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?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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 January 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$780FlexibilityNo cancel feeOn-time62%
British AirwaysCheapest$546Average$707FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$584Average$750FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$600Average$799FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$605Average$1,041FlexibilityNo cancel feeOn-time71%
DeltaCheapest$652Average$859FlexibilityNo cancel feeOn-timeN/A

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