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Cheap flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport from £204

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 16/11. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
22 Aug — 29 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Luis Munoz Marin Intl to Heathrow

Enter your travel dates to find the best prices.

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 23 July 2026.

Sun 15/1116:55
SJU
-
LHR
1 stop35h 00m
United Airlines
Wed 18/1106:50
LHR
-
SJU
2 stops21h 46m
United Airlines
Deal found 21/7£554
Mon 16/1113:18
SJU
-
LHR
1 stop13h 32m
Iberia
Fri 20/1109:45
LHR
-
SJU
1 stop15h 42m
Iberia
Deal found 19/7£582
Thu 26/1115:35
SJU
-
LHR
1 stop13h 25m
Virgin Atlantic
Thu 3/1215:50
LHR
-
SJU
1 stop29h 30m
Virgin Atlantic
Deal found 19/7£587
Tue 8/913:16
SJU
-
LHR
1 stop14h 34m
Virgin Atlantic
Tue 15/909:20
LHR
-
SJU
1 stop17h 59m
Virgin Atlantic
Deal found 19/7£593
Wed 11/1121:35
SJU
-
LHR
1 stop13h 20m
Iberia
Tue 24/1110:45
LHR
-
SJU
1 stop13h 15m
Iberia
Deal found 21/7£607
Wed 11/1113:53
SJU
-
LHR
1 stop13h 27m
American Airlines
Tue 24/1106:05
LHR
-
SJU
1 stop17h 55m
American Airlines
Deal found 23/7£610
Sun 15/1110:32
SJU
-
LHR
2 stops21h 33m
Iberia
Wed 18/1107:35
LHR
-
SJU
1 stop13h 05m
Iberia
Deal found 21/7£614

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 23 July 2026.

Round-trip from

£554

One-way from

£204

Popular in

June

Cheapest in

October

Average price

£834
United Airlines
  • United Airlines
  • 15/11-18/11
  • 3 total stops
  • 56h 46m total
  • San Juan to London
Search Deals
Iberia
  • Iberia
  • 16/11
  • 1 total stop
  • 13h 10m total
  • San Juan to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£89 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
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Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 23 July 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

Fly to

Route

Depart

Return

Price

Cheapest return flight

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 20/10

07:00-07:55

1 stop19h 55m

London Heathrow

Tue 27/10

06:50-23:36

2 stops20h 46m

£616

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 11/10

13:06-08:50

1 stop14h 44m

London Heathrow

Sun 18/10

11:45-23:56

2 stops17h 11m

£661

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 17/1

07:30-06:20

2 stops18h 50m

London Heathrow

Sat 30/1

12:30-23:50

1 stop15h 20m

£682

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 22/11

13:00-21:20

1 stop28h 20m

London Heathrow

Mon 30/11

12:05-21:26

1 stop37h 21m

£688

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 29/12

02:05-21:20

1 stop15h 15m

London Heathrow

Fri 8/1

06:50-00:36

2 stops21h 46m

£733

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 29/8

12:56-12:05

2 stops18h 09m

London Heathrow

Tue 8/9

20:05-16:49

2 stops25h 44m

£734

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

07:30-06:20

1 stop17h 50m

London Heathrow

Sun 16/8

08:20-23:52

1 stop20h 32m

£741
Fastest return journey

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 26/11

15:10-08:45

1 stop13h 35m

London Heathrow

Mon 30/11

08:55-23:13

1 stop18h 18m

£745

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 12/8

12:56-12:05

2 stops18h 09m

London Heathrow

Mon 17/8

08:20-22:29

2 stops19h 09m

£757

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sun 13/12

07:00-08:45

2 stops21h 45m

London Heathrow

Wed 23/12

16:10-14:15

2 stops26h 05m

£969

Flights are sorted by cheapest return flights first.

Deals found on 21/7

Showing 1-10 of 19 resultsSorted by cheapest first
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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 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 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?

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 68 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, October 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 £539). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £847). 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 for a return flight from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport?

Airfare is below average for this route at the moment.

San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport flights typically cost between £678 and £816 in November.
The cheapest return price found within the last 5 days was £554 on United Airlines (15 Nov–18 Nov).

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?

    For as low as £661, United Airlines can have you in London Heathrow Airport from San Juan Luis Munoz Marin Intl Airport in 14h 44m. Airlines will cover a distance of 4179 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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 holiday 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, October 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 £539). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £847). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Milton Keynes
Luton
Wembley
Gatwick
Slough
Ilford
Hayes
Croydon
Colchester
Brentford
Eastbourne
Northampton
Watford
Swindon
Southend-on-Sea
Poole
Kingston upon Thames
Southall
Aylesbury

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Alternative routes for Luis Munoz Marin Intl to Heathrow

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

Fly with Cheapflights

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

Deals for Luis Munoz Marin Intl to Heathrow flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Luis Munoz Marin Intl to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Certainly. Search results for flights to Heathrow from Luis Munoz Marin Intl shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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