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Cheap flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport from £343

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
7 Jul — 14 Jul1
1 adult

Cheapflights Tip: The best prices from London Heathrow to San Juan Luis Munoz Marin Intl are usually found in September or January, booked 76 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 2 July 2025.

Round-trip from

£495

One-way from

£343

Popular in

December

Cheapest in

September

Average price

£785
Icelandair
  • Icelandair
  • 9/9-24/9
  • 3 total stops
  • 53h 47m total
  • London to San Juan
Search Deals
13/9
  • 13/9
  • 3 total stops
  • 34h 08m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£19 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 July 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 2 July 2025.

Tue 9/908:25LHR - SJU
1 stop32h 42mIcelandair
Wed 24/907:25SJU - LHR
2 stops21h 05mIcelandair
Deal found 30/6£495
Sat 20/908:15LHR - SJU
1 stop13h 27mJetBlue
Tue 30/914:05SJU - LHR
1 stop14h 25mJetBlue
Deal found 1/7£525
Wed 1/1009:30LHR - SJU
3 stops33h 28mMultiple Airlines
Tue 14/1002:06SJU - LHR
3 stops23h 24mMultiple Airlines
Deal found 30/6£533
Mon 15/922:05LHR - SJU
1 stop18h 50mAvianca
Wed 17/918:15SJU - LHR
1 stop16h 20mAvianca
Deal found 1/7£581
Thu 6/1106:00LHR - SJU
2 stops25h 17mTAP AIR PORTUGAL
Sat 15/1106:15SJU - LHR
2 stops35h 20mTAP AIR PORTUGAL
Deal found 30/6£634

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 2 July 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

Tue 9/9

08:25-12:07

1 stop32h 42m

San Juan Luis Munoz Marin Intl

Wed 24/9

07:25-09:30

2 stops21h 05m

£495

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 20/9

08:15-16:42

1 stop13h 27m

San Juan Luis Munoz Marin Intl

Tue 30/9

14:05-09:30

1 stop14h 25m

£525

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 1/10

09:30-13:58

3 stops33h 28m

San Juan Luis Munoz Marin Intl

Tue 14/10

02:06-06:30

3 stops23h 24m

£533

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 15/9

22:05-11:55

1 stop18h 50m

San Juan Luis Munoz Marin Intl

Wed 17/9

18:15-15:35

1 stop16h 20m

£581

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 6/11

06:00-03:17

2 stops25h 17m

San Juan Luis Munoz Marin Intl

Sat 15/11

06:15-21:35

2 stops35h 20m

£634

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 13/9

20:50-01:58

3 stops34h 08m

£343

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 28/8

22:05-16:50

1 stop23h 45m

£527

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 29/8

19:50-00:49

2 stops33h 59m

£576

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 14/8

08:15-23:34

1 stop20h 19m

£716

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 20/11

06:15-02:10

2 stops23h 55m

£1,369

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 12 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 27 June 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 76 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 2 July 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 is the cheapest day to fly from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the cheapest time to fly return from Heathrow to Luis Munoz Marin Intl. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Monday mornings when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost for a return flight from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport?

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 2 July 2025.
See what other customers who have flown with Delta, United Airlines, andJetBlue 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.
Delta
8.0
Very Good
7,975 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Delta
8.0
Very Good
7,975 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
United Airlines
7.4
Good
8,858 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
JetBlue
7.3
Good
2,918 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
TAP AIR PORTUGAL
7.1
Good
1,912 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good
Icelandair
7.0
Good
514 reviews
Delta
8.0
Very Good
7,975 reviews
Check prices

Boarding

8.2

Crew

8.5

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
6.0
Good

Colin,Sept 2024

LHR - BOS

Delta One is very poor quality seating for first class. On multiple trips pieces have come off the seat. Staff and food have been good

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, Icelandair (£495), JetBlue (£525), and Avianca (£581) 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 21% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport one-way?

    One-way options have recently been found by users for as low as £527 on Avianca. Other airlines that offer cheap prices include TAP AIR PORTUGAL from £576 and JetBlue from £716 one-way.

  • 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 2 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£351Average£1,101FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£403Average£585FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£408Average£539FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£441Average£557FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£500Average£707FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£526Average£677FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Luis Munoz Marin Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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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