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Cheap flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport from £256

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 28/2. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
8 1월 — 15 1월1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from San Juan Luis Munoz Marin Intl to London Heathrow are usually found in September or February, booked 69 days in advance, depart on a Tuesday or Monday and return on a Monday

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 9 12월 2025.

수 31/1208:30SJU - LHR
1 stop18h 10mUnited Airlines
수 7/112:00LHR - SJU
2 stops38h 22mUnited Airlines
Deal found 7/12£584
수 31/1214:08SJU - LHR
1 stop12h 42mKLM
수 7/112:40LHR - SJU
1 stop15h 17mKLM
Deal found 8/12£645
금 26/1215:46SJU - LHR
1 stop35h 44mUnited Airlines
금 9/116:20LHR - SJU
1 stop24h 57mUnited Airlines
Deal found 8/12£686
수 17/1201:59SJU - LHR
1 stop15h 41mJetBlue
목 25/1209:20LHR - SJU
1 stop18h 36mJetBlue
Deal found 6/12£715
수 31/1206:14SJU - LHR
2 stops21h 51mMultiple Airlines
수 7/115:15LHR - SJU
2 stops38h 07mMultiple Airlines
Deal found 7/12£752
화 30/1211:40SJU - LHR
1 stop17h 50mJetBlue
수 7/112:20LHR - SJU
1 stop15h 30mJetBlue
Deal found 7/12£757
화 30/1208:10SJU - LHR
1 stop17h 45mUnited Airlines
수 7/110:25LHR - SJU
2 stops18h 11mUnited Airlines
Deal found 7/12£784
목 18/1208:10SJU - LHR
1 stop19h 45mUnited Airlines
목 25/1213:25LHR - SJU
2 stops36h 01mUnited Airlines
Deal found 6/12£794

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 9 12월 2025.

Round-trip from

£396

One-way from

£256

Popular in

June

Cheapest in

September

Average price

£828
Iberia
  • Iberia
  • 13/2-21/2
  • 2 total stops
  • 28h 42m total
  • San Juan to London
Search Deals
28/2
  • 28/2
  • 3 total stops
  • 23h 50m total
  • San Juan to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£139 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 9 12월 2025.
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

Luis Munoz Marin Intl

Fly to

Heathrow

Route

Depart

Return

Price

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

목 22/1

13:58-09:15

1 stop15h 17m

London Heathrow

목 29/1

11:25-19:55

1 stop12h 30m

£430

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

월 16/2

02:05-21:20

1 stop15h 15m

London Heathrow

화 24/2

06:50-21:00

2 stops18h 10m

£431

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

금 23/1

14:15-09:10

1 stop14h 55m

London Heathrow

월 26/1

06:50-21:00

2 stops18h 10m

£431

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

토 14/2

14:10-09:10

1 stop15h 00m

London Heathrow

토 21/2

06:30-22:22

2 stops19h 52m

£433

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

금 13/2

14:10-08:25

1 stop14h 15m

London Heathrow

토 21/2

06:30-22:22

2 stops19h 52m

£433

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

수 18/2

17:50-10:50

1 stop13h 00m

London Heathrow

목 26/2

08:30-22:22

2 stops17h 52m

£440

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

금 30/1

14:15-09:10

1 stop14h 55m

London Heathrow

월 2/2

08:30-22:22

2 stops17h 52m

£440

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

수 21/1

02:05-21:20

1 stop15h 15m

London Heathrow

목 29/1

08:30-22:22

2 stops17h 52m

£440

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

목 15/1

02:05-21:20

1 stop15h 15m

London Heathrow

월 26/1

08:30-22:22

2 stops17h 52m

£440

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

토 14/2

13:10-09:00

1 stop15h 50m

London Heathrow

토 21/2

10:10-23:56

1 stop17h 46m

£446

Flights are sorted by cheapest return flights first.

Deals found on 8/12

Showing 1-10 of 16 results
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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?

Use this chart to determine the optimal time to book a return flight from Luis Munoz Marin Intl to Heathrow. Price data was last updated on 5 December 2025.

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 69 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, September 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 £76). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £737). 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?

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 £431, American Airlines can have you in London Heathrow Airport from San Juan Luis Munoz Marin Intl Airport in 15h 15m. 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, September 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 £76). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £737). 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
Milton Keynes
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Northampton
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Gatwick
Wembley
Ilford
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Colchester
Watford
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Deal
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Chichester

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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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