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Cheap flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport from £300

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 28/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from London Heathrow to San Juan Luis Munoz Marin Intl are usually found in September or April, 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 25 March 2025.

Round-trip from

£507

One-way from

£300

Popular in

July

Cheapest in

September

Average price

£588
Finnair
  • Finnair
  • 9/9-24/9
  • 2 total stops
  • 31h 25m total
  • London to San Juan
Search Deals
28/4
  • 28/4
  • 2 total stops
  • 46h 07m total
  • London to San Juan
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£107 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 25 March 2025.

Wed 3/907:50LHR - SJU
1 stop15h 40mFinnair
Thu 18/913:55SJU - LHR
1 stop14h 30mFinnair
Deal found 24/3£508
Tue 9/908:15LHR - SJU
1 stop22h 30mIcelandair
Tue 23/903:15SJU - LHR
1 stop12h 30mIcelandair
Deal found 24/3£509
Mon 3/1108:25LHR - SJU
1 stop18h 35mJetBlue
Tue 11/1101:59SJU - LHR
1 stop14h 46mJetBlue
Deal found 24/3£510
Wed 3/906:30LHR - SJU
2 stops17h 00mIberia
Thu 18/913:55SJU - LHR
1 stop14h 30mIberia
Deal found 24/3£575
Wed 28/507:05LHR - SJU
2 stops23h 54mMultiple Airlines
Sat 7/616:58SJU - LHR
2 stops45h 57mMultiple Airlines
Deal found 24/3£579
Thu 6/1112:25LHR - SJU
2 stops19h 55mTAP AIR PORTUGAL
Sat 15/1106:15SJU - LHR
2 stops25h 10mTAP AIR PORTUGAL
Deal found 24/3£670
Wed 23/412:15LHR - SJU
2 stops37h 23mUnited Airlines
Wed 30/413:25SJU - LHR
1 stop12h 50mUnited Airlines
Deal found 24/3£691

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 25 March 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 3/9

07:50-18:30

1 stop15h 40m

San Juan Luis Munoz Marin Intl

Thu 18/9

13:55-09:25

1 stop14h 30m

£508

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 9/9

08:15-01:45

1 stop22h 30m

San Juan Luis Munoz Marin Intl

Tue 23/9

03:15-20:45

1 stop12h 30m

£509

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 23/4

08:25-00:06

1 stop20h 41m

San Juan Luis Munoz Marin Intl

Tue 29/4

03:28-20:45

1 stop12h 17m

£520

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 3/9

06:30-18:30

2 stops17h 00m

San Juan Luis Munoz Marin Intl

Thu 18/9

13:55-09:25

1 stop14h 30m

£575

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 28/5

07:05-01:59

2 stops23h 54m

San Juan Luis Munoz Marin Intl

Sat 7/6

16:58-19:55

2 stops45h 57m

£579

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Wed 23/4

12:15-20:38

2 stops37h 23m

San Juan Luis Munoz Marin Intl

Wed 30/4

13:25-07:15

1 stop12h 50m

£691

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 25/4

14:05-13:50

2 stops28h 45m

San Juan Luis Munoz Marin Intl

Thu 1/5

01:05-06:30

2 stops24h 25m

£859

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 22/4

13:05-23:15

1 stop15h 10m

San Juan Luis Munoz Marin Intl

Tue 29/4

07:15-06:25

2 stops18h 10m

£872

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 1/9

06:15-18:30

1 stop17h 15m

San Juan Luis Munoz Marin Intl

Tue 9/9

11:55-09:40

2 stops16h 45m

£891

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Mon 28/4

22:15-15:22

2 stops46h 07m

£300

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 16 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 21 March 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 25 March 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.

Rainfall in Luis Munoz Marin Intl by month

Plan your trip to Luis Munoz Marin Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan Luis Munoz Marin Intl Airport ranges from 55.0 - 156.0 inches per month. November is typically the wettest month, when rainfall can reach 156.0 mm. March is typically the driest time to visit San Juan Luis Munoz Marin Intl Airport when rainfall is around 55.0 mm.

Temperature in Luis Munoz Marin Intl by month

Plan your trip to Luis Munoz Marin Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan Luis Munoz Marin Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 25.0 C).

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 25 March 2025.
Finnair
7.6
Good
1,266 reviews
Check prices

Food

6.7

Comfort

7.4

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
Finnair
7.6
Good
1,266 reviews
Finnair
7.6
Good
1,266 reviews
Check prices

Food

6.7

Comfort

7.4

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
United Airlines
7.4
Good
8,605 reviews
Finnair
7.6
Good
1,266 reviews
Check prices

Food

6.7

Comfort

7.4

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
Virgin Atlantic
7.4
Good
634 reviews
Finnair
7.6
Good
1,266 reviews
Check prices

Food

6.7

Comfort

7.4

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
JetBlue
7.3
Good
2,923 reviews
Finnair
7.6
Good
1,266 reviews
Check prices

Food

6.7

Comfort

7.4

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
WestJet
7.2
Good
2,785 reviews
Finnair
7.6
Good
1,266 reviews
Check prices

Food

6.7

Comfort

7.4

Crew

8.1

Overall

7.6

Boarding

7.6

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?

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, Finnair (£507), Iberia (£507), and Icelandair (£509) 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 23% 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 £515 on Iberia. Other airlines that offer cheap prices include JetBlue from £575 and Avianca from £575 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£437Average£574FlexibilityNo cancel feeOn-time76%
Search Finnair flights
JetBlueCheapest£455Average£691FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
IcelandairCheapest£465Average£570FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£520Average£693FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£582Average£765FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£876Average£1,170FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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