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Cheap flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport from £336

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 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
20 Aug — 27 Aug1
1 adult

Cheapflights Tip: The best prices from London Heathrow to San Juan Luis Munoz Marin Intl are usually found in November or January, booked 88 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap flight deals from Heathrow to Luis Munoz Marin Intl

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Luis Munoz Marin Intl (SJU). 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 15 August 2025.

Round-trip from

£496

One-way from

£336

Popular in

December

Cheapest in

November

Average price

£762
JetBlue
  • JetBlue
  • 12/11-21/11
  • 2 total stops
  • 39h 08m total
  • London to San Juan
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28/8
  • 28/8
  • 3 total stops
  • 56h 38m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£18 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Heathrow to Luis Munoz Marin Intl

Cheapest flights from Heathrow to Luis Munoz Marin Intl
Explore the most affordable flight options available from Heathrow to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2025.

Wed 12/1107:25LHR - SJU
1 stop24h 23mJetBlue
Fri 21/1102:00SJU - LHR
1 stop14h 45mJetBlue
Deal found 13/8£496
Tue 16/908:15LHR - SJU
1 stop13h 40mJetBlue
Sat 20/918:05SJU - LHR
1 stop21h 40mJetBlue
Deal found 14/8£499
Tue 9/908:15LHR - SJU
1 stop19h 17mIcelandair
Wed 24/906:00SJU - LHR
2 stops19h 30mIcelandair
Deal found 13/8£500
Wed 3/908:15LHR - SJU
1 stop18h 09mIcelandair
Thu 18/913:00SJU - LHR
1 stop12h 30mIcelandair
Deal found 14/8£501
Tue 4/1112:20LHR - SJU
1 stop19h 28mJetBlue
Tue 11/1109:30SJU - LHR
1 stop20h 00mJetBlue
Deal found 13/8£506
Tue 9/908:25LHR - SJU
2 stops19h 07mIcelandair
Sun 21/919:55SJU - LHR
1 stop29h 35mIcelandair
Deal found 14/8£510
Sat 27/908:25LHR - SJU
1 stop32h 55mJetBlue
Fri 3/1003:03SJU - LHR
1 stop12h 42mJetBlue
Deal found 13/8£513
Wed 12/1112:20LHR - SJU
2 stops33h 53mIcelandair
Fri 21/1104:00SJU - LHR
1 stop12h 45mIcelandair
Deal found 13/8£514
Fri 7/1107:25LHR - SJU
1 stop16h 05mIcelandair
Sat 15/1119:20SJU - LHR
1 stop21h 25mIcelandair
Deal found 13/8£515

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Luis Munoz Marin Intl 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 858,174 searches. Data last updated 15 August 2025.
Use the filters below to find and compare flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Heathrow

Fly to

Luis Munoz Marin Intl

Route

Depart

Return

Price

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 12/11

07:25-03:48

1 stop24h 23m

San Juan Luis Munoz Marin Intl

Fri 21/11

02:00-20:45

1 stop14h 45m

£496

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 15/1

09:20-04:20

1 stop23h 00m

San Juan Luis Munoz Marin Intl

Sun 25/1

21:35-20:45

1 stop19h 10m

£496

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 16/9

08:15-16:55

1 stop13h 40m

San Juan Luis Munoz Marin Intl

Sat 20/9

18:05-20:45

1 stop21h 40m

£499

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 8/11

07:25-21:54

1 stop18h 29m

San Juan Luis Munoz Marin Intl

Tue 18/11

09:30-09:30

1 stop20h 00m

£499

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 9/9

08:15-22:32

1 stop19h 17m

San Juan Luis Munoz Marin Intl

Wed 24/9

06:00-06:30

2 stops19h 30m

£500

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 5/2

07:25-00:37

1 stop21h 12m

San Juan Luis Munoz Marin Intl

Sun 15/2

21:10-06:55

1 stop29h 45m

£500

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/9

08:15-21:24

1 stop18h 09m

San Juan Luis Munoz Marin Intl

Thu 18/9

13:00-06:30

1 stop12h 30m

£501

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 28/8

15:30-19:08

3 stops56h 38m

£336

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 14/11

08:15-03:03

2 stops22h 48m

£337

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 15/11

13:05-17:54

2 stops32h 49m

£354

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 13 results
1
2

Best time to book a flight from Heathrow to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport

How far ahead should I book a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the optimal time to book a return flight from Heathrow to Luis Munoz Marin Intl. Price data was last updated on 8 August 2025.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport, you should look to book at least 88 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport (average of £631). Flying from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport in July is currently the most expensive (average of £1,027). 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 LHR to SJU?

Find hourly flight availability from Heathrow to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 August 2025.

A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport in the morning. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the evening.

What’s the top stopover airport for flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Share of one-stop return flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.

New York (JFK) – chosen by Cheapflights users on 56% of one-stop itineraries from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport on Cheapflights.

What’s the cheapest stopover airport for flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Average return fare for one-stop flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Boston (BOS) is the most affordable one-stop option, with an average return flight price of £585.

What’s the fastest stopover option from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Shortest average travel time for one-stop one-way flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Madrid (MAD) have the shortest average one-way travel time for one-stop routes: 13h 49m.

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Average stopover duration for one-stop one-way flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 33m.

Reviews of airlines servicing Luis Munoz Marin Intl

Get insights into the airlines that provide service to Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl. Reviews last updated 15 August 2025.
See what other customers who have flown with Finnair, JetBlue, andIcelandair from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,321 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Comfort

7.5

Overall

7.6

Crew

8.1

Food

6.7

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Finnair
7.6
Good
1,321 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Comfort

7.5

Overall

7.6

Crew

8.1

Food

6.7

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
JetBlue
7.2
Good
2,913 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Comfort

7.5

Overall

7.6

Crew

8.1

Food

6.7

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Icelandair
7.0
Good
526 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Comfort

7.5

Overall

7.6

Crew

8.1

Food

6.7

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Iberia
7.0
Good
2,882 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Comfort

7.5

Overall

7.6

Crew

8.1

Food

6.7

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
British Airways
6.7
Okay
7,267 reviews
Finnair
7.6
Good
1,321 reviews
Check prices

Boarding

7.6

Entertainment

6.9

Comfort

7.5

Overall

7.6

Crew

8.1

Food

6.7

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Luis Munoz Marin Intl. 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 London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport round-trip?

    According to our current data, Virgin Atlantic (£340), JetBlue (£442), and Finnair (£452) offers the cheapest pricing from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport. You may be able to fly from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport for 47% less than the average price by searching for these airlines.

  • Can I find deals for flights from Heathrow to Luis Munoz Marin Intl that include hotel bookings?

    Yes. In addition to deals on Heathrow to Luis Munoz Marin Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Luis Munoz Marin Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Luis Munoz Marin Intl.

  • Can I find deals for business class flights from Heathrow to Luis Munoz Marin Intl?

    Yes. Cheapflights offers flight deals from Heathrow to Luis Munoz Marin Intl 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 London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

    Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport (average of £631). Flying from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport in July is currently the most expensive (average of £1,027). 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

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Alternative routes for Heathrow to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Luis Munoz Marin Intl flights
London City to Luis Munoz Marin Intl flights
Stansted to Luis Munoz Marin Intl flights

Top 6 airlines flying from Heathrow to Luis Munoz Marin Intl

Discover the top 6 airlines that operate flights from Heathrow to Luis Munoz Marin Intl. 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 858,174 searches. Data last updated 15 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£340Average£1,112FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£442Average£589FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£452Average£558FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£452Average£575FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£506Average£724FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£533Average£698FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Luis Munoz Marin Intl?

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to Luis Munoz Marin Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Luis Munoz Marin Intl from Heathrow.

Can Cheapflights find flights from Heathrow to Luis Munoz Marin Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Luis Munoz Marin Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Luis Munoz Marin Intl become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Luis Munoz Marin Intl flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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