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Cheap flights from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport from £241

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 20/1. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — LHR
25 Dec — 1 Jan1
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 March, booked 69 days in advance, depart on a Tuesday or Monday and return on a Monday

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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 25 November 2025.

Tue 30/1210:15SJU - LHR
1 stop20h 00mUnited Airlines
Sun 11/112:50LHR - SJU
1 stop15h 46mUnited Airlines
Deal found 24/11£451
Mon 29/1202:05SJU - LHR
2 stops23h 50mUnited Airlines
Sat 10/110:00LHR - SJU
1 stop24h 11mUnited Airlines
Deal found 24/11£455
Tue 2/1218:42SJU - LHR
1 stop13h 23mIberia
Tue 9/1209:15LHR - SJU
1 stop14h 40mIberia
Deal found 22/11£504
Tue 30/1210:15SJU - LHR
1 stop20h 00mLufthansa
Thu 8/112:45LHR - SJU
1 stop15h 51mLufthansa
Deal found 24/11£518
Wed 24/1208:10SJU - LHR
1 stop17h 45mUnited Airlines
Sat 10/110:00LHR - SJU
1 stop24h 11mUnited Airlines
Deal found 24/11£521
Wed 24/1214:15SJU - LHR
1 stop14h 55mUnited Airlines
Fri 9/116:20LHR - SJU
2 stops26h 20mUnited Airlines
Deal found 24/11£525
Tue 30/1203:45SJU - LHR
1 stop22h 35mDelta
Fri 9/110:45LHR - SJU
2 stops34h 05mDelta
Deal found 24/11£529
Mon 29/1203:45SJU - LHR
1 stop22h 35mDelta
Sat 10/111:05LHR - SJU
1 stop32h 13mDelta
Deal found 24/11£531
Thu 4/1214:10SJU - LHR
1 stop15h 00mLufthansa
Wed 10/1212:00LHR - SJU
1 stop16h 36mLufthansa
Deal found 22/11£547
Tue 30/1203:45SJU - LHR
1 stop22h 35mDelta
Wed 7/116:35LHR - SJU
2 stops25h 56mDelta
Deal found 24/11£560
Tue 2/1208:30SJU - LHR
2 stops18h 40mUnited Airlines
Tue 9/1206:50LHR - SJU
2 stops19h 32mUnited Airlines
Deal found 22/11£569

Cheap 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 25 November 2025.

Round-trip from

£429

One-way from

£241

Popular in

June

Cheapest in

September

Average price

£553
Iberia
  • Iberia
  • 4/2-8/2
  • 2 total stops
  • 30h 54m total
  • San Juan to London
Search Deals
JetBlue
  • JetBlue
  • 20/1
  • 1 total stop
  • 21h 15m total
  • San Juan to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£138 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 November 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 25 November 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

Fri 13/2

02:05-21:20

1 stop15h 15m

London Heathrow

Sat 21/2

07:30-22:22

2 stops18h 52m

£437

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 4/2

14:45-10:50

2 stops16h 05m

London Heathrow

Sun 8/2

06:50-22:22

2 stops19h 32m

£440

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 21/1

02:05-20:35

1 stop14h 30m

London Heathrow

Thu 29/1

08:30-22:22

2 stops17h 52m

£443

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Thu 15/1

02:05-21:20

1 stop15h 15m

London Heathrow

Mon 26/1

08:30-22:22

2 stops17h 52m

£443

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 17/2

02:05-21:20

1 stop15h 15m

London Heathrow

Thu 26/2

08:30-22:22

2 stops17h 52m

£443

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Wed 18/2

14:10-09:10

1 stop15h 00m

London Heathrow

Fri 27/2

09:30-00:36

2 stops19h 06m

£443

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Fri 6/3

23:59-22:00

1 stop18h 01m

£249

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Sat 7/3

23:40-20:45

1 stop17h 05m

£249

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Tue 14/4

09:52-11:55

2 stops21h 03m

£271

San JuanLondon

SJU - LHR

SJULHR

San Juan Luis Munoz Marin Intl

Mon 13/4

01:59-20:45

1 stop13h 46m

£271

Flights are sorted by cheapest return flights first.

Deals found on 22/11

Showing 1-10 of 12 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 21 November 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 £77). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £750). 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 SJU to LHR?

Find hourly flight availability from Luis Munoz Marin Intl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 November 2025.

It’s optimal to fly from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in the morning. By choosing this option you can save up to 59% on the cost of your flight, compared to a flight in the evening.

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 £437, United 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.

  • 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 £77). Flying from San Juan Luis Munoz Marin Intl Airport to London Heathrow Airport in June is currently the most expensive (average of £750). 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
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Gatwick
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Luton
Ilford
Wembley
Deal
Hayes
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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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