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Cheap flights from London Heathrow Airport to San Juan Luis Munoz Marin Intl Airport from £355

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 14/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SJU
18 Jun — 25 Jun1
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 13 June 2025.

Round-trip from

£470

One-way from

£355

Popular in

December

Cheapest in

September

Average price

£629
23/9-30/9
  • 23/9-30/9
  • 4 total stops
  • 58h 38m total
  • London to San Juan
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14/8
  • 14/8
  • 3 total stops
  • 57h 21m 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).
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Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
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Average for round-trip flights in June 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 13 June 2025.

Tue 23/909:50LHR - SJU
2 stops29h 04mMultiple Airlines
Tue 30/921:26SJU - LHR
2 stops29h 34mMultiple Airlines
Deal found 10/6£470
Tue 9/908:25LHR - SJU
1 stop32h 42mIcelandair
Sun 21/912:50SJU - LHR
1 stop26h 55mIcelandair
Deal found 11/6£503
Tue 4/1108:25LHR - SJU
1 stop18h 35mJetBlue
Thu 13/1106:15SJU - LHR
1 stop19h 40mJetBlue
Deal found 12/6£506
Thu 6/1108:15LHR - SJU
2 stops23h 02mTAP AIR PORTUGAL
Sat 15/1107:10SJU - LHR
2 stops24h 15mTAP AIR PORTUGAL
Deal found 12/6£647

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 13 June 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 23/9

09:50-09:54

2 stops29h 04m

San Juan Luis Munoz Marin Intl

Tue 30/9

21:26-08:00

2 stops29h 34m

£470

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 9/9

08:25-12:07

1 stop32h 42m

San Juan Luis Munoz Marin Intl

Sun 21/9

12:50-20:45

1 stop26h 55m

£503

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 4/11

12:20-00:37

1 stop16h 17m

San Juan Luis Munoz Marin Intl

Wed 12/11

01:59-20:45

1 stop14h 46m

£506

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 6/11

08:15-03:17

2 stops23h 02m

San Juan Luis Munoz Marin Intl

Sat 15/11

07:10-11:25

2 stops24h 15m

£647

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 4/11

06:30-23:31

2 stops21h 01m

San Juan Luis Munoz Marin Intl

Wed 12/11

05:55-11:30

1 stop25h 35m

£757

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Thu 14/8

20:50-01:11

3 stops57h 21m

£355

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Tue 24/6

22:05-16:50

1 stop23h 45m

£546

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 29/8

11:30-18:30

1 stop12h 00m

£550

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Sat 23/8

08:15-19:19

1 stop16h 04m

£571

LondonSan Juan

LHR - SJU

LHRSJU

London Heathrow

Fri 29/8

08:00-09:55

2 stops30h 55m

£606

Flights are sorted by cheapest return flights first.

Deals found on 11/6

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 9 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 13 June 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 13 June 2025.
Read through reviews of airlines operating flights from London to San Juan, such as United Airlines, Virgin Atlantic and JetBlue. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,790 reviews
Check prices

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
United Airlines
7.4
Good
8,790 reviews
United Airlines
7.4
Good
8,790 reviews
Check prices

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Virgin Atlantic
7.4
Good
652 reviews
United Airlines
7.4
Good
8,790 reviews
Check prices

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
JetBlue
7.3
Good
2,923 reviews
United Airlines
7.4
Good
8,790 reviews
Check prices

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
TAP AIR PORTUGAL
7.1
Good
1,885 reviews
United Airlines
7.4
Good
8,790 reviews
Check prices

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.
Icelandair
7.0
Good
499 reviews
United Airlines
7.4
Good
8,790 reviews
Check prices

Entertainment

7.0

Boarding

7.7

Comfort

7.3

Food

6.6

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Apr 2025

TPE - SFO

The boarding experience was okay. The dietary food choices were limited, the midway snacks were hard and dry. The seat was uncomfortable - stiff seat cushion, seat back kept springing back to the upright position, narrow seat width. Love the app and the ability to track my luggage. Flight crew was efficient.

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 (£503), JetBlue (£506), and TAP AIR PORTUGAL (£647) 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 £546 on Avianca. Other airlines that offer cheap prices include Iberia from £550 and JetBlue from £571 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 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£355Average£1,114FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
JetBlueCheapest£408Average£593FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£412Average£546FlexibilityNo cancel feeOn-time76%
Search Finnair flights
IcelandairCheapest£447Average£564FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£506Average£714FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£532Average£689FlexibilityNo 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?

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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