HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$326+ 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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Luis Munoz Marin Intl to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 21, 2026.

This British Airways deal was found by Cheapflights users on 1/20. 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.
Tue 2/172:23 pm
SJU
-
LHR
1 stop14h 12m
British Airways
Mon 3/27:05 pm
LHR
-
SJU
1 stop28h 50m
British Airways
Deal found 1/20$534
This British Airways deal was found by Cheapflights users on 1/20. 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 4/151:25 pm
SJU
-
LHR
1 stop12h 25m
British Airways
Thu 4/308:50 am
LHR
-
SJU
2 stops18h 15m
British Airways
Deal found 1/20$541
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Wed 2/188:05 am
SJU
-
LHR
1 stop18h 35m
United Airlines
Sat 2/286:50 am
LHR
-
SJU
2 stops19h 32m
United Airlines
Deal found 1/20$550
This British Airways deal was found by Cheapflights users on 1/20. 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.
Tue 3/311:23 pm
SJU
-
LHR
1 stop16h 42m
British Airways
Tue 4/77:35 pm
LHR
-
SJU
2 stops31h 30m
British Airways
Deal found 1/20$551
This Finnair deal was found by Cheapflights users on 1/19. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/182:23 pm
SJU
-
LHR
1 stop14h 12m
Finnair
Fri 2/2710:35 am
LHR
-
SJU
1 stop16h 56m
Finnair
Deal found 1/19$554
This United Airlines deal was found by Cheapflights users on 1/19. 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.
Wed 4/157:40 am
SJU
-
LHR
1 stop18h 05m
United Airlines
Thu 4/237:25 am
LHR
-
SJU
2 stops18h 59m
United Airlines
Deal found 1/19$557
This United Airlines deal was found by Cheapflights users on 1/20. 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 2/172:05 am
SJU
-
LHR
1 stop14h 30m
United Airlines
Fri 2/279:30 am
LHR
-
SJU
2 stops19h 06m
United Airlines
Deal found 1/20$561
This United Airlines deal was found by Cheapflights users on 1/20. 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 3/52:05 am
SJU
-
LHR
1 stop15h 15m
United Airlines
Fri 3/136:50 am
LHR
-
SJU
2 stops18h 32m
United Airlines
Deal found 1/20$568
This United Airlines deal was found by Cheapflights users on 1/19. 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.
Wed 3/42:05 am
SJU
-
LHR
1 stop14h 30m
United Airlines
Thu 3/126:50 am
LHR
-
SJU
2 stops18h 32m
United Airlines
Deal found 1/19$569
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Fri 2/277:40 am
SJU
-
LHR
2 stops18h 40m
United Airlines
Tue 3/106:50 am
LHR
-
SJU
2 stops18h 32m
United Airlines
Deal found 1/20$573

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 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$534
(British Airways)

One-way from

$326
(JetBlue)

Popular in

June

Cheapest in

September

Average price

$771
Provider with most accurate pricing for San Juan Luis Munoz Marin Intl-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Juan Luis Munoz Marin Intl-London Heathrow flights.
Search Deals
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. 23% potential increase in price ($254 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 21, 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

Tue 2/17

2:23 pm-8:35 am

1 stop14h 12m

London Heathrow

Mon 3/2

7:05 pm-7:55 pm

1 stop28h 50m

$534

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 4/15

1:25 pm-6:50 am

1 stop12h 25m

London Heathrow

Thu 4/30

8:50 am-10:05 pm

2 stops18h 15m

$541

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

8:05 am-6:40 am

1 stop18h 35m

London Heathrow

Sat 2/28

6:50 am-10:22 pm

2 stops19h 32m

$550

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 3/31

11:46 am-11:05 am

1 stop18h 19m

London Heathrow

Tue 4/7

9:10 pm-10:05 pm

2 stops29h 55m

$551

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

2:23 pm-8:35 am

1 stop14h 12m

London Heathrow

Fri 2/27

10:35 am-11:31 pm

1 stop16h 56m

$554

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 2/17

8:30 am-5:55 am

1 stop17h 25m

London Heathrow

Mon 3/2

8:30 am-10:22 pm

2 stops17h 52m

$561

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 2/18

7:40 am-10:15 am

1 stop22h 35m

London Heathrow

Fri 2/27

9:30 am-12:36 am

2 stops19h 06m

$561

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 3/7

11:40 pm-8:45 pm

1 stop17h 05m

$326

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 2/27

7:10 am-12:40 pm

2 stops25h 30m

$344

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 4/22

1:31 pm-9:00 am

1 stop14h 29m

$352

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 14 results
1
2
  • 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 January 16, 2026.

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 $977). 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.

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 January 21, 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
8,085 reviews

Food

7.2

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

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
8,085 reviews
Delta
7.9
Good
8,085 reviews

Food

7.2

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

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
8,085 reviews

Food

7.2

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

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
9,190 reviews
Delta
7.9
Good
8,085 reviews

Food

7.2

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

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
11,172 reviews
Delta
7.9
Good
8,085 reviews

Food

7.2

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

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
2,890 reviews
Delta
7.9
Good
8,085 reviews

Food

7.2

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Entertainment

7.8

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 12m. Fly via British Airways or 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. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 Virgin Atlantic and United 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, 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 $977). 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
Croydon
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Luis Munoz Marin Intl to Heathrow

Discover the top 5 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 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$864FlexibilityNo cancel feeOn-time62%
Virgin AtlanticCheapest$584Average$750FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$600Average$799FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$605Average$997FlexibilityNo cancel feeOn-time71%
DeltaCheapest$652Average$794FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.